Abdelmajid BENAMARA | ENIM : National Engineering School of Monastir - TUNISIE (original) (raw)
Books by Abdelmajid BENAMARA
The papers in this volume were selected for presentation at the 18th International Meshing Roundt... more The papers in this volume were selected for presentation at the 18th International Meshing Roundtable (IMR), held October 25-28, 2009 in Salt Lake City, UT, USA. The conference was started by Sandia National Laboratories in 1992 as a small meeting of organizations striving to establish a common focus for research and development in the field of mesh generation. Now after 18 consecutive years, the International Meshing Roundtable has become recognized as an international focal point annually attended by researchers and developers from dozens of countries around the world.
The 18th International Meshing Roundtable consists of technical presentations from contributed papers, research notes, keynote and invited talks, short course presentations, and a poster session and competition. The Program Committee
would like to express its appreciation to all who participate to make the IMR a successful and enriching experience.
The papers in these proceedings were selected from more than 40 paper submissions.
Based on input from peer reviews, the committee selected these papers for their perceived quality, originality, and appropriateness to the theme of the International Meshing Roundtable. We would like to thank all who submitted papers. We would also like to thank the colleagues who provided reviews of the submitted papers.
The names of the reviewers are acknowledged in the following pages.
We extend special thanks to Jacqueline Hunter for her time and effort to make
the 18th IMR another outstanding conference.
August 2009 18th IMR Program Committee
Papers by Abdelmajid BENAMARA
Dans le cadre de l'intégration de la méthode des éléments finis dans les systèmes CAO, nous p... more Dans le cadre de l'intégration de la méthode des éléments finis dans les systèmes CAO, nous présentons dans ce papier une technique permettant de détecter et de localiser de façon automatique les zones de modifications effectuées sur un modèle CAO existant. Cette méthode est basée sur l'abstraction de la géométrie en un espace vectoriel. A partir de cet espace vectoriel, un calcul tensoriel permettra de ramener la géométrie en équations. La comparaison des modèles CAO se réduit à une comparaison tensorielle. La présence d'un tel outil dans les systèmes CAO rend la mise à jour de certaines tâches de conception et d'analyse automatique et plus flexible, telle que la tâche du maillage et d'analyse. Abstruct: In the context of the integration of the finite elements method in CAD systems, we present in this paper a new techniques aims to detect and to localize automatically the modifications of existing CAD part. This method is based on the abstraction of the geometry...
At present, numeric simulation is at the heart of the product development cycle. To accelerate th... more At present, numeric simulation is at the heart of the product development cycle. To accelerate the design and simulation tasks, it is necessary to prepare the CAD model before the simulation process. This pre-processing task consists on cleaning the CAD geometry, performing a ...
Computer-Aided Design, 2015
h i g h l i g h t s • Tolerance integration in CAD model. • The realistic modeling of the parts a... more h i g h l i g h t s • Tolerance integration in CAD model. • The realistic modeling of the parts and assemblies. • Prediction of the tolerance impacts. • Updating the mating constraints.
The International Journal of Advanced Manufacturing Technology, 2018
The tolerancing integration in CAD model is among the major interests of most mechanical manufact... more The tolerancing integration in CAD model is among the major interests of most mechanical manufacturers. Several researches have been established approaches considering the geometrical and dimensional tolerances on the CAD modelers. However, the hypothesis of rigid parts is adopted in the digital mock-up. Thus, several physical factors are neglected; especially the deformations. In this regard, this paper presents a model for considering both tolerances and deformations in CAD model. The dimensional and geometrical tolerances are taken into account by the determination of assemblies configurations with defects basing on the worst case tolerancing. The finite elements (FE) computations are realized with realistic models. A method for modeling the realistic mating constraints, between rigid and non-rigid parts, is developed. Planar and cylindrical joints are considered. The proposed tolerance analysis method is highlighted throughout two cases study: the first comprises planar joints and the second comprises cylindrical parts in motion. Keywords CAD. GD&T. Realistic mating. Non-rigid component and tolerance analysis 2 State of the art This paper can be positioned under the research works belonging to two themes: (1) Tolerancing of rigid parts; (2) Tolerancing of non-rigid parts. 2.1 Tolerancing of rigid parts Based on models for the representation of a toleranced geometry [4, 5], several studies contributed to the development of * A.
The tolerancing step has a great importance in the design process. It characterises the relations... more The tolerancing step has a great importance in the design process. It characterises the relationship between the different sectors of the product life cycle: Design, Manufacturing and Control. We can distinguish several methods to assist the tolerancing process in the design. Based on arithmetic and statistical method, this paper presents a new approach of analysis and verification of tolerances. The chosen approach is based on the Worst Case Method as an arithmetic method and Monte Carlo method as a statistical method. In this paper, we compare these methods and we present our main approach, which is validated using an example of 1 D tolerancing.
The tolerancing step has a great importance in the design process. It characterises the relations... more The tolerancing step has a great importance in the design process. It characterises the relationship between the different sectors of the product life cycle: Design, Manufacturing and Control. We can distinguish several methods to assist the tolerancing process in the design. Based on arithmetic and statistical method, this paper presents a new approach of analysis and verification of tolerances. The chosen approach is based on the Worst Case Method as an arithmetic method and Monte Carlo method as a statistical method. In this paper, we compare these methods and we present our main approach, which is validated using an example of 1 D tolerancing.
Most of methodologies, concepts and tools, which integrate Computer Aided Design (CAD) and Life C... more Most of methodologies, concepts and tools, which integrate Computer Aided Design (CAD) and Life Cycle Assessment (LCA) systems and aim at ecodesigning, are generally oriented to the environmental assessment. The environmental improvement is treated only in a few works; however it is a pivotal phase in the eco-design process. In this paper, we propose a new environmental improvement process based on the remaining Degrees of Freedom (DoFs) for CAD designer on which he can act to eco-design his/her CAD model. The originality in this process is the expression of a CAD model environmental impacts in function of CAD designer DoFs, aiming at help non environment experiment designer to eco-design products in CAD phase. For this, first, we present the concept of DoFs and we use it to identify the CAD designer action zone. Second, we establish the impact matrix of DoFs in each life phase, then; we develop the global impact matrix .The assembly of EIs by linear summation of the matrix columns ...
Nous presentons dans ce papier la technique de vectorisation en vue de detecter de facon automati... more Nous presentons dans ce papier la technique de vectorisation en vue de detecter de facon automatique les modifications geometriques effectuees sur une piece en CAO. Cela permettra, dans un contexte de re-analyse, de ne remailler qu’au voisinage des modifications detectees. L’outil developpe, est base sur une representation vectorielle de la geometrie ce qui ramene la comparaison a un simple calcul tensoriel.
The integration of environmental aspects in the design process is getting more and more covered b... more The integration of environmental aspects in the design process is getting more and more covered by the scientific research. Owing to the issued regulations, industries tend to reduce their environmental impacts (EIs) while keeping a minimal manufacturing cost. The process plan operations order has an influence on the EIs and cost of a product. In this paper, we propose a new based scenarios methodology by using feature technology (FT) which allows the non-environmental expert designer to choose the most optimal manufacturing scenario with the best compromise EIs/Cost. First, we present an overview of works using the FT in CAD phase to reduce EIs and cost of a manufacturing process. Secondly, we propose a new methodology based on both FT and scenarisation which helps inexperienced eco-designers. Finally, a case study is considered to validate the proposed approach.
Nowadays, the integration of different mechanical design process stages (Design, analysis and man... more Nowadays, the integration of different mechanical design process stages (Design, analysis and manufacturing) of is a necessity so as to reduce the time of design and optimization. This tendency of integration CAD/CAM/Analysis and automation of the corresponding processes requires shared data between the various tasks using an integrated product model. Our research is oriented to CAD/CAM/Analysis integration by rebuilding the CAD model (BREP) starting from the CAE results (deformed mesh).
Nowadays, due to the increasing of the customer requirements, mechanical products become more and... more Nowadays, due to the increasing of the customer requirements, mechanical products become more and more complex. Computer Aided Design (CAD) / Computer Aided Engineering (CAE) tools should provide functionalities to assist the designers in the choice and validation of the proposed solutions of the product. This paper presents a new method for generating disassembly sequence plan (DS) of mechanical product. This method is based on the concept of subassembly. Thus, a DS of the product into subassemblies is proposed. Then, for each identified subassembly, a DS is generated. To carry the proposals, a SolidworksMatlab co-simulation solution is detailed. A concrete example is presented in order to highlight the feasibility and effectiveness of the proposed approach. Mots clefs : Mots clefs Interopérabilité, Séquence de désassemblage, Sous-assemblage, Co-simulation, CAO, CAE.
a. Mechanical Engineering Laboratory, National Engineering School of Monastir, Monastir Universit... more a. Mechanical Engineering Laboratory, National Engineering School of Monastir, Monastir University, Av. Ibn Eljazzar, 5019 Monastir, Tunisia. a, b. LIPPS, ETS, 1100, Notre-Dame Ouest, Montreal, H3C1K3, Quebec, Canada. Borhen.louhichi@etsmtl.ca, abdelmajid.benamara@enim.rnu.tn Abstract: The part and assembly requirements are specified by the tolerances. In the Digital Mock-Up (DMU), the product is designed on nominal configuration and the tolerances are formally allocated to the CAD model. Thus, the impacts of the tolerance stack-up on the advanced phase of the product design (Dynamic computation, F.E Analysis...) are neglected. The DMU improvement requires the tolerance integration in CAD model. A developed model allows obtaining the components with defects according to dimensional and geometrical tolerances specified in the nominal model. In CAD model, the assembly of the components with dimensional and geometrical defects requires the updating of the assembly mating constraints. T...
La simplification de la géométrie CAO est une étape de préparation du modèle CAO, qui se place en... more La simplification de la géométrie CAO est une étape de préparation du modèle CAO, qui se place en amont de la phase de simulation de comportement d’une pièce ou d’un système mécanique. Entre autres le concepteur est appelé à effectuer plusieurs calculs pour valider les solutions proposées, l’objectif de ce papier c’est de présenter une méthode, multi-objectifs et multi-critères basée sur un algorithme original pour la génération des modèles de calcul par idéalisation de modèle CAO. Une validation de la méthode sur des exemples de pièces mécaniques est également présentée.
Design and Modeling of Mechanical Systems—III
Nowadays, mechanical products which respond to customer requirements become more and more complex... more Nowadays, mechanical products which respond to customer requirements become more and more complex. Concurrent engineering environment requires that various computer-aided tools be used concurrently for design, analysis, and validation of complex product. Computer-aided design (CAD) and computer-aided engineering (CAE) tools should have the capacity of integration or easy interoperability. However, many of them are often unconnected systems that are not intended for collaborative use. Engineering designers and analysts tend to use specific CAD software for design and other CAE software for analysis. Consequently, the triplet (Cost/Delay/Quality) of a complex product cannot be improved. In this paper, a disassembly plan (DP) generation based on a coupling between Solidworks and Matlab is detailed. Base on an encapsulation of parts into a subassemblies bloc, the proposed approach aims to automatically integrate the both softwares in a concurrent engineering context in order to identify and generate a feasible and optimal DP. A comparative example is presented in order to highlight the feasibility and efficiency of the proposed approach.
The International Journal of Advanced Manufacturing Technology
Following the environmental crises of recent decades, a turning point in the awareness of the fra... more Following the environmental crises of recent decades, a turning point in the awareness of the fragility of ecosystems has been marked, i.e., environmental awareness. This has contributed to the development of various environmental laws and regulations such as the “Waste Electrical and Electronic Equipment,” the “Restriction of Hazardous Substances,” and the “Registration, Evaluation, Authorization and Restriction of Chemicals” regulations and the “Energy Using Products” Directives. Our work contributes to the development of eco-friendly product manufacturing processes. In order to estimate and optimize the environmental impacts of a product, most of the methodologies, concepts, and tools that integrate computer-aided design (CAD) and life cycle assessment systems generally exploit the feature technology at the level of each feature independently of the others, i.e., “microplanning.” The feature interaction technology (FIT) is treated only in few studies, but it is pivotal in the eco-manufacturing process. In this paper, we propose a new manufacturing-scenarios-based methodology by using FIT and a Multi-criteria Decision Support Method (MCDSM), which helps manufacturers maintain their marketplaces by producing goods in an eco-friendly way. In fact, this methodology helps designers choose from the CAD design phase the most ecological manufacturing process from possible existent scenarios in real time.
Journal of Computing and Information Science in Engineering
In the design step, the realistic modeling of the product represents an industrial requirement an... more In the design step, the realistic modeling of the product represents an industrial requirement and a digital muck up (DMU) improvement. Thus, the tolerance integration in the computer aided design (CAD) model with the neglect of important physical factors, such as the components’ deformations during the mounting and assembly operation, causes a deviation between the numerical and the realistic models. In this regard, this paper presents a new model for the tolerance analysis of CAD assemblies based on the consideration of both manufacturing defects and deformations. The dimensional and geometrical tolerances are considered by the determination of assemblies’ configurations with defects based on the worst case tolerancing. The finite elements (FEs) simulation is realized with realistic models. An algorithm for updating the realistic mating constraints, between rigid and nonrigid parts, is developed. The case study of an assembly with planar and cylindrical joints is presented.
Procedia CIRP
Abstract Currently, the tolerancing integration in CAD model is among the major interests of most... more Abstract Currently, the tolerancing integration in CAD model is among the major interests of most mechanical manufacturers. Several studies and researches have been established to consider the geometrical and dimensional tolerances on the CAD modelers. However, the hypothesis of rigid parts is adopted in the digital mock-up. Thus, several physical factors are neglected; especially the deformations. In this regard, this paper presents a model for considering both tolerances and deformations in CAD model. The dimensional and geometrical tolerances are taken into account by the determination of assemblies configurations with defects basing on the worst case tolerancing. The Finite Elements (FE) computations are realized with realistic models. A method for modeling the realistic mating constraints, between rigid and non-rigid parts, is developed. The case study of an assembly with planar joint is presented.
Revue Internationale D Ingenierie Numerique, 2005
RÉSUMÉ. Dans un contexte d'ingénierie simultanée, l'intégration entre les diffé... more RÉSUMÉ. Dans un contexte d'ingénierie simultanée, l'intégration entre les différentes étapes de modélisation devient de plus en plus une nécessité. En effet, les problèmes d'intégration s'avèrent les premiers responsables de perte de temps durant la phase d'optimisation. Le ...
The papers in this volume were selected for presentation at the 18th International Meshing Roundt... more The papers in this volume were selected for presentation at the 18th International Meshing Roundtable (IMR), held October 25-28, 2009 in Salt Lake City, UT, USA. The conference was started by Sandia National Laboratories in 1992 as a small meeting of organizations striving to establish a common focus for research and development in the field of mesh generation. Now after 18 consecutive years, the International Meshing Roundtable has become recognized as an international focal point annually attended by researchers and developers from dozens of countries around the world.
The 18th International Meshing Roundtable consists of technical presentations from contributed papers, research notes, keynote and invited talks, short course presentations, and a poster session and competition. The Program Committee
would like to express its appreciation to all who participate to make the IMR a successful and enriching experience.
The papers in these proceedings were selected from more than 40 paper submissions.
Based on input from peer reviews, the committee selected these papers for their perceived quality, originality, and appropriateness to the theme of the International Meshing Roundtable. We would like to thank all who submitted papers. We would also like to thank the colleagues who provided reviews of the submitted papers.
The names of the reviewers are acknowledged in the following pages.
We extend special thanks to Jacqueline Hunter for her time and effort to make
the 18th IMR another outstanding conference.
August 2009 18th IMR Program Committee
Dans le cadre de l'intégration de la méthode des éléments finis dans les systèmes CAO, nous p... more Dans le cadre de l'intégration de la méthode des éléments finis dans les systèmes CAO, nous présentons dans ce papier une technique permettant de détecter et de localiser de façon automatique les zones de modifications effectuées sur un modèle CAO existant. Cette méthode est basée sur l'abstraction de la géométrie en un espace vectoriel. A partir de cet espace vectoriel, un calcul tensoriel permettra de ramener la géométrie en équations. La comparaison des modèles CAO se réduit à une comparaison tensorielle. La présence d'un tel outil dans les systèmes CAO rend la mise à jour de certaines tâches de conception et d'analyse automatique et plus flexible, telle que la tâche du maillage et d'analyse. Abstruct: In the context of the integration of the finite elements method in CAD systems, we present in this paper a new techniques aims to detect and to localize automatically the modifications of existing CAD part. This method is based on the abstraction of the geometry...
At present, numeric simulation is at the heart of the product development cycle. To accelerate th... more At present, numeric simulation is at the heart of the product development cycle. To accelerate the design and simulation tasks, it is necessary to prepare the CAD model before the simulation process. This pre-processing task consists on cleaning the CAD geometry, performing a ...
Computer-Aided Design, 2015
h i g h l i g h t s • Tolerance integration in CAD model. • The realistic modeling of the parts a... more h i g h l i g h t s • Tolerance integration in CAD model. • The realistic modeling of the parts and assemblies. • Prediction of the tolerance impacts. • Updating the mating constraints.
The International Journal of Advanced Manufacturing Technology, 2018
The tolerancing integration in CAD model is among the major interests of most mechanical manufact... more The tolerancing integration in CAD model is among the major interests of most mechanical manufacturers. Several researches have been established approaches considering the geometrical and dimensional tolerances on the CAD modelers. However, the hypothesis of rigid parts is adopted in the digital mock-up. Thus, several physical factors are neglected; especially the deformations. In this regard, this paper presents a model for considering both tolerances and deformations in CAD model. The dimensional and geometrical tolerances are taken into account by the determination of assemblies configurations with defects basing on the worst case tolerancing. The finite elements (FE) computations are realized with realistic models. A method for modeling the realistic mating constraints, between rigid and non-rigid parts, is developed. Planar and cylindrical joints are considered. The proposed tolerance analysis method is highlighted throughout two cases study: the first comprises planar joints and the second comprises cylindrical parts in motion. Keywords CAD. GD&T. Realistic mating. Non-rigid component and tolerance analysis 2 State of the art This paper can be positioned under the research works belonging to two themes: (1) Tolerancing of rigid parts; (2) Tolerancing of non-rigid parts. 2.1 Tolerancing of rigid parts Based on models for the representation of a toleranced geometry [4, 5], several studies contributed to the development of * A.
The tolerancing step has a great importance in the design process. It characterises the relations... more The tolerancing step has a great importance in the design process. It characterises the relationship between the different sectors of the product life cycle: Design, Manufacturing and Control. We can distinguish several methods to assist the tolerancing process in the design. Based on arithmetic and statistical method, this paper presents a new approach of analysis and verification of tolerances. The chosen approach is based on the Worst Case Method as an arithmetic method and Monte Carlo method as a statistical method. In this paper, we compare these methods and we present our main approach, which is validated using an example of 1 D tolerancing.
The tolerancing step has a great importance in the design process. It characterises the relations... more The tolerancing step has a great importance in the design process. It characterises the relationship between the different sectors of the product life cycle: Design, Manufacturing and Control. We can distinguish several methods to assist the tolerancing process in the design. Based on arithmetic and statistical method, this paper presents a new approach of analysis and verification of tolerances. The chosen approach is based on the Worst Case Method as an arithmetic method and Monte Carlo method as a statistical method. In this paper, we compare these methods and we present our main approach, which is validated using an example of 1 D tolerancing.
Most of methodologies, concepts and tools, which integrate Computer Aided Design (CAD) and Life C... more Most of methodologies, concepts and tools, which integrate Computer Aided Design (CAD) and Life Cycle Assessment (LCA) systems and aim at ecodesigning, are generally oriented to the environmental assessment. The environmental improvement is treated only in a few works; however it is a pivotal phase in the eco-design process. In this paper, we propose a new environmental improvement process based on the remaining Degrees of Freedom (DoFs) for CAD designer on which he can act to eco-design his/her CAD model. The originality in this process is the expression of a CAD model environmental impacts in function of CAD designer DoFs, aiming at help non environment experiment designer to eco-design products in CAD phase. For this, first, we present the concept of DoFs and we use it to identify the CAD designer action zone. Second, we establish the impact matrix of DoFs in each life phase, then; we develop the global impact matrix .The assembly of EIs by linear summation of the matrix columns ...
Nous presentons dans ce papier la technique de vectorisation en vue de detecter de facon automati... more Nous presentons dans ce papier la technique de vectorisation en vue de detecter de facon automatique les modifications geometriques effectuees sur une piece en CAO. Cela permettra, dans un contexte de re-analyse, de ne remailler qu’au voisinage des modifications detectees. L’outil developpe, est base sur une representation vectorielle de la geometrie ce qui ramene la comparaison a un simple calcul tensoriel.
The integration of environmental aspects in the design process is getting more and more covered b... more The integration of environmental aspects in the design process is getting more and more covered by the scientific research. Owing to the issued regulations, industries tend to reduce their environmental impacts (EIs) while keeping a minimal manufacturing cost. The process plan operations order has an influence on the EIs and cost of a product. In this paper, we propose a new based scenarios methodology by using feature technology (FT) which allows the non-environmental expert designer to choose the most optimal manufacturing scenario with the best compromise EIs/Cost. First, we present an overview of works using the FT in CAD phase to reduce EIs and cost of a manufacturing process. Secondly, we propose a new methodology based on both FT and scenarisation which helps inexperienced eco-designers. Finally, a case study is considered to validate the proposed approach.
Nowadays, the integration of different mechanical design process stages (Design, analysis and man... more Nowadays, the integration of different mechanical design process stages (Design, analysis and manufacturing) of is a necessity so as to reduce the time of design and optimization. This tendency of integration CAD/CAM/Analysis and automation of the corresponding processes requires shared data between the various tasks using an integrated product model. Our research is oriented to CAD/CAM/Analysis integration by rebuilding the CAD model (BREP) starting from the CAE results (deformed mesh).
Nowadays, due to the increasing of the customer requirements, mechanical products become more and... more Nowadays, due to the increasing of the customer requirements, mechanical products become more and more complex. Computer Aided Design (CAD) / Computer Aided Engineering (CAE) tools should provide functionalities to assist the designers in the choice and validation of the proposed solutions of the product. This paper presents a new method for generating disassembly sequence plan (DS) of mechanical product. This method is based on the concept of subassembly. Thus, a DS of the product into subassemblies is proposed. Then, for each identified subassembly, a DS is generated. To carry the proposals, a SolidworksMatlab co-simulation solution is detailed. A concrete example is presented in order to highlight the feasibility and effectiveness of the proposed approach. Mots clefs : Mots clefs Interopérabilité, Séquence de désassemblage, Sous-assemblage, Co-simulation, CAO, CAE.
a. Mechanical Engineering Laboratory, National Engineering School of Monastir, Monastir Universit... more a. Mechanical Engineering Laboratory, National Engineering School of Monastir, Monastir University, Av. Ibn Eljazzar, 5019 Monastir, Tunisia. a, b. LIPPS, ETS, 1100, Notre-Dame Ouest, Montreal, H3C1K3, Quebec, Canada. Borhen.louhichi@etsmtl.ca, abdelmajid.benamara@enim.rnu.tn Abstract: The part and assembly requirements are specified by the tolerances. In the Digital Mock-Up (DMU), the product is designed on nominal configuration and the tolerances are formally allocated to the CAD model. Thus, the impacts of the tolerance stack-up on the advanced phase of the product design (Dynamic computation, F.E Analysis...) are neglected. The DMU improvement requires the tolerance integration in CAD model. A developed model allows obtaining the components with defects according to dimensional and geometrical tolerances specified in the nominal model. In CAD model, the assembly of the components with dimensional and geometrical defects requires the updating of the assembly mating constraints. T...
La simplification de la géométrie CAO est une étape de préparation du modèle CAO, qui se place en... more La simplification de la géométrie CAO est une étape de préparation du modèle CAO, qui se place en amont de la phase de simulation de comportement d’une pièce ou d’un système mécanique. Entre autres le concepteur est appelé à effectuer plusieurs calculs pour valider les solutions proposées, l’objectif de ce papier c’est de présenter une méthode, multi-objectifs et multi-critères basée sur un algorithme original pour la génération des modèles de calcul par idéalisation de modèle CAO. Une validation de la méthode sur des exemples de pièces mécaniques est également présentée.
Design and Modeling of Mechanical Systems—III
Nowadays, mechanical products which respond to customer requirements become more and more complex... more Nowadays, mechanical products which respond to customer requirements become more and more complex. Concurrent engineering environment requires that various computer-aided tools be used concurrently for design, analysis, and validation of complex product. Computer-aided design (CAD) and computer-aided engineering (CAE) tools should have the capacity of integration or easy interoperability. However, many of them are often unconnected systems that are not intended for collaborative use. Engineering designers and analysts tend to use specific CAD software for design and other CAE software for analysis. Consequently, the triplet (Cost/Delay/Quality) of a complex product cannot be improved. In this paper, a disassembly plan (DP) generation based on a coupling between Solidworks and Matlab is detailed. Base on an encapsulation of parts into a subassemblies bloc, the proposed approach aims to automatically integrate the both softwares in a concurrent engineering context in order to identify and generate a feasible and optimal DP. A comparative example is presented in order to highlight the feasibility and efficiency of the proposed approach.
The International Journal of Advanced Manufacturing Technology
Following the environmental crises of recent decades, a turning point in the awareness of the fra... more Following the environmental crises of recent decades, a turning point in the awareness of the fragility of ecosystems has been marked, i.e., environmental awareness. This has contributed to the development of various environmental laws and regulations such as the “Waste Electrical and Electronic Equipment,” the “Restriction of Hazardous Substances,” and the “Registration, Evaluation, Authorization and Restriction of Chemicals” regulations and the “Energy Using Products” Directives. Our work contributes to the development of eco-friendly product manufacturing processes. In order to estimate and optimize the environmental impacts of a product, most of the methodologies, concepts, and tools that integrate computer-aided design (CAD) and life cycle assessment systems generally exploit the feature technology at the level of each feature independently of the others, i.e., “microplanning.” The feature interaction technology (FIT) is treated only in few studies, but it is pivotal in the eco-manufacturing process. In this paper, we propose a new manufacturing-scenarios-based methodology by using FIT and a Multi-criteria Decision Support Method (MCDSM), which helps manufacturers maintain their marketplaces by producing goods in an eco-friendly way. In fact, this methodology helps designers choose from the CAD design phase the most ecological manufacturing process from possible existent scenarios in real time.
Journal of Computing and Information Science in Engineering
In the design step, the realistic modeling of the product represents an industrial requirement an... more In the design step, the realistic modeling of the product represents an industrial requirement and a digital muck up (DMU) improvement. Thus, the tolerance integration in the computer aided design (CAD) model with the neglect of important physical factors, such as the components’ deformations during the mounting and assembly operation, causes a deviation between the numerical and the realistic models. In this regard, this paper presents a new model for the tolerance analysis of CAD assemblies based on the consideration of both manufacturing defects and deformations. The dimensional and geometrical tolerances are considered by the determination of assemblies’ configurations with defects based on the worst case tolerancing. The finite elements (FEs) simulation is realized with realistic models. An algorithm for updating the realistic mating constraints, between rigid and nonrigid parts, is developed. The case study of an assembly with planar and cylindrical joints is presented.
Procedia CIRP
Abstract Currently, the tolerancing integration in CAD model is among the major interests of most... more Abstract Currently, the tolerancing integration in CAD model is among the major interests of most mechanical manufacturers. Several studies and researches have been established to consider the geometrical and dimensional tolerances on the CAD modelers. However, the hypothesis of rigid parts is adopted in the digital mock-up. Thus, several physical factors are neglected; especially the deformations. In this regard, this paper presents a model for considering both tolerances and deformations in CAD model. The dimensional and geometrical tolerances are taken into account by the determination of assemblies configurations with defects basing on the worst case tolerancing. The Finite Elements (FE) computations are realized with realistic models. A method for modeling the realistic mating constraints, between rigid and non-rigid parts, is developed. The case study of an assembly with planar joint is presented.
Revue Internationale D Ingenierie Numerique, 2005
RÉSUMÉ. Dans un contexte d'ingénierie simultanée, l'intégration entre les diffé... more RÉSUMÉ. Dans un contexte d'ingénierie simultanée, l'intégration entre les différentes étapes de modélisation devient de plus en plus une nécessité. En effet, les problèmes d'intégration s'avèrent les premiers responsables de perte de temps durant la phase d'optimisation. Le ...
Sujet : Contribution à l'intégration de la composante calcul dans une démarche de conception fonc... more Sujet : Contribution à l'intégration de la composante calcul dans une démarche de conception fonctionnelle intégrée, application aux mécanismes.
Ces notes sont un support du cours de conception des systèmes mécaniques (15H). C'est une présent... more Ces notes sont un support du cours de conception des systèmes mécaniques (15H). C'est une présentation succincte et condensée du contenu réel du module et qui ne prétend pas être un ouvrage détaillé dans la matière. Pour bien comprendre le contenu de ce document, il est impératif d'assister aux séances de cours Ce fascicule de cours est un recueil des principales approches d'analyse cinématique des systèmes mécaniques et plus particulièrement les mécanismes plans. Dans un premier chapitre on s'intéressera aux notions de base de la conception des systèmes mécaniques en insistant sur la terminologie et les définitions. Dans le second chapitre nous aborderons la problème de modélisation des mécanismes en vue d'introduire la notion de modèle mécanique et les hypothèses y afférant. Nous resterons dans le cadre des hypothèses de liaison parfaite et de solide indéformable et nous nous détaillons en particulier la notion de graphe de liaisons ainsi que les torseurs associés aux liaisons. Nous consacrerons ensuite le quatrième chapitre à l'étude de la mobilité et de l'hyperstatisme des systèmes mécaniques avec leurs différentes configurations (chaînes cinématiques ouvertes, liaisons parallèles, chaînes complexes, etc. L'analyse cinématique des mécanismes plan fera l'objet du quatrième chapitre de ce document. Après avoir détaillé le paramétrage des mécanismes plans, nous introduisons ensuite les outils d'analyse (analytique et graphique) des vitesses et des accélérations. Le dernier chapitre de ce document sera consacré à l'étude des mécanismes à cames. 2
