mahesh chudasama - Academia.edu (original) (raw)

Papers by mahesh chudasama

International Journal of Advanced Research in Science, Communication and Technology

This study has been undertaken to give a review of polyethylene terephthalate glycol (PETG) mater... more This study has been undertaken to give a review of polyethylene terephthalate glycol (PETG) material used in fused deposition modelling (FDM). It offers a review of the existing literature on PETG material. The objective of the paper is to providing guidance on different process parameters that can be used to improve strength of the part by performing various testing like tensile, compressive, flexural etc. This research targets to find new paths that can be used for further development of use of fiber reinforcement in PETG material.

Recent Advances in Manufacturing Modelling and Optimization

Annals of Pathology and Laboratory Medicine, 2022

Background: Infertility is of global health concern affecting one out of six couples worldwide, a... more Background: Infertility is of global health concern affecting one out of six couples worldwide, and Africa has reported the highest rates. Bacterial semen infections are considered to be one of the significant causes of infertility. Effective antimicrobial therapy is therefore essential in treatment of bacteriospermia. This study aimed to identify the bacterial pathogens present in semen and involved performing the antimicrobial susceptibility testing to improve the clinical management by identifying the antimicrobials that can be the best treatment option.Methods: Ninety semen specimens were collected from male patients having primary infertility who attended the clinic. Semen was cultured on Nutrient agar, Blood agar, MacConkey agar and Chocolate blood agar using standard bacteriological techniques. Bacterial isolates identification was done by studying the colony characteristics, performing gram staining reactions and biochemical testing. Modified Kirby-Bauer method was used in p...

Presented at Symposium on Hadron Collider Physics 2006 (HCP 2006), Durham, North Carolina, 22-26 May 2006, Jul 1, 2007

Recent results on searches for new physics at Run II of the Tevatron are reported. The searches c... more Recent results on searches for new physics at Run II of the Tevatron are reported. The searches cover many different final states and previous hints of signals, but all analyses have at this point led to negative results.

3-roller conical bending process is widely used in the industries for manufacturing of conical se... more 3-roller conical bending process is widely used in the industries for manufacturing of conical sections and shells. It involves static as well dynamic bending stages. Analytical models for prediction of bending force during static as well as dynamic bending stage are available in the literature. In this paper bending forces required for static bending stage and dynamic bending stages have been compared using the analytical models. It is concluded that force required for dynamic bending is very less as compared to the bending force required during the static bending stage.

Conical sections and shells of metal plates manufactured by 3-roller conical bending process are ... more Conical sections and shells of metal plates manufactured by 3-roller conical bending process are widely used in the industries. The process is completed by first bending the metal plates statically and then dynamic roller bending sequentially. It is required to have an analytical model to get maximum bending force, for optimum design of the machine, for static bending stage. Analytical models assuming various stress conditions are considered and these analytical models are compared considering various parameters and reported in this paper. It is concluded from the study that for higher bottom roller inclination, the shear stress affects greatly to the static bending force whereas for lower bottom roller inclination it can be neglected.

Conical sections and shells made from metal plates are widely used in various industrial applicat... more Conical sections and shells made from metal plates are widely used in various industrial applications. 3-roller conical bending process is preferably used to produce such conical sections and shells. Bending mechanics involved in the process is complex and little work is done in this area. In the present paper an analytical model is developed to predict bending force which will be acting during 3-roller conical bending process. To verify the developed model, conical bending experiments are performed. Analytical results and experimental results were compared. Force predicted by analytical model is in close proximity of the experimental results. The error in the prediction is ±10%. Hence the model gives quite satisfactory results. Present model is also compared with the previously published bending force prediction model and it is found that the present model gives better results. The developed model can be used to estimate the bending force during 3-roller bending process and can be ...

International Journal of Engineering, 2022

Solar thermal systems for heating have a high level of reliability. The usage of parabolic trough... more Solar thermal systems for heating have a high level of reliability. The usage of parabolic trough collectors (PTC) for domestic applications is still quite limited; furthermore, commercial utilization of nanofluids in these applications is rare. The influence of MWCNT nanofluid as a heat transfer fluid on the efficiency of a locally developed parabolic trough collector was experimentally examined. The effect of surfactant on nanofluid stability was also investigated, and it was revealed that nanoparticles could be evenly suspended in base fluid for at least 10 days and less than one month using Triton X-100. Experiments were also conducted to determine the optimal quantity of Triton X-100 surfactant; it is possible to make nanoparticles stable for 28 days in base fluid with the ratio of Triton X-100 to MWCNT as 0.5:1. At 2.0, 3.0, and 4.0 L/min flow rates, MWCNT/H2O is used at three-particle concentrations of 0.1, 0.2, and 0.3% by weight. The experiment is carried out under outdoor operating conditions. With 3 L/min at 0.2 wt.%, MWCNT nanofluid achieves a maximum thermal efficiency that is 22% greater than the water. The findings provide important information about the commercialization of a locally developed PTC.

In aerospace engineering, CFRP is a mostly used material for making different parts of aero plane... more In aerospace engineering, CFRP is a mostly used material for making different parts of aero planes. The CFRP material is a one of the composite material .Till now no any technique which is used to weld together of cfrp material.so that there is a only one technique is mostly used and that is a drill the hole and use the fasteners to join them. So that the quality of hole is very most important. Thus, the choice of optimized cutting parameters is very important for controlling the required hole quality. In this present work the aim is to optimized the cutting parameters through work piece hole size, circularity and delamination.in this research an experimental investigation of a full factorial design performed on thin CFRP laminated sheet using HSS drill with different point angle 90°,120°,150°and by varying different spindle speed (3500,4500,5500 rpm )and feed rate(200,500,900 mm/min )to determine optimum cutting condition. The hole quality parameters analyzed include hole diameter,...

Rapid prototyping (RP) techniques are used to quickly fabricate prototypes directly from CAD data... more Rapid prototyping (RP) techniques are used to quickly fabricate prototypes directly from CAD data using 3D printing or additive manufacturing. Fused Deposition Modeling (FDM) is one of the popular techniques of RP used to produce polymer parts, but due to limited mechanical properties of purely printed polymer using FDM there is a need developed to produce composites using FDM. The aim of this review article is to analyze the fiber reinforced composite polymer developed using FDM. This article gives an overview of different concepts used to produce Fiber Reinforced Polymer (FRP) using FDM, their Mechanical Properties as well as challenges in the way of producing fiber reinforced composite using this technique. Keywords: Fused Deposition Modeling (FDM), fiber reinforced composite, Rapid Prototyping (RP), Carbon fiber, Glass fiber

Deep drawing is one of the most widely used sheet metal forming processes in the production of au... more Deep drawing is one of the most widely used sheet metal forming processes in the production of automotive components. The formability of a blank depends on the process parameters such as blank holder force, lubrication, punch and die radii, over and above these operating parameters, successful deep drawing involves decision of process sequence, dieclearance, in addition to material properties and thickness of the sheet metal. Facility for manufacturing single groove pulley for automotive applications was available. Need arises to produce double groove pulley for the same application with the same manufacturing setup. First, material of the blank was identified and tested for the required properties. The process was studied and various factors affecting the process are identified and analyzed. Attempt has been made to simulate the single groove pulley using different constraints. The simulation results were compared with the available results and found satisfactory. The simulation wa...

Universal Journal of Mechanical Engineering, 2014

3-roller conical bending process is one which is used for producing conical sections or cone frus... more 3-roller conical bending process is one which is used for producing conical sections or cone frustums from metal plates for various industrial applications. The plates to be bent are cut for the required size and shape and then rolled between three cylindrical rollers. The plate is kept between one top roller and two bottom rollers. Than the top roller is lowered down and the plate gets bend. The rollers are rotated to get the roll bending of the plate. Final dimension of the cone frustum are achieved through setting appropriate machine setting parameters. An attempt is made in this paper to develop the analytical model for the prediction of the bending force during the stage of dynamic roll bending. During the roll bending of the plate there will be shear stresses along with the normal stresses. The analytical model has been developed considering these shear stresses. The model consists of various parameters like material parameters and geometrical parameters. Based on the analytical models derived, effects of some of the material parameters on dynamic bending force have been studied. In the development process complex mechanics involved in this process has been simplified so it will give insight of the process and will be helpful to the researchers and designers working in the area of metal forming, especially in roll bending process.

International Journal of Material Forming, 2011

ABSTRACT Roll bending process is an important metal forming process used to produce cylindrical a... more ABSTRACT Roll bending process is an important metal forming process used to produce cylindrical and conical shells and sections for various applications. 3-roller conical bending is one such process. For this process it is important to evaluate the maximum force acting on the rollers during the rolling process for designing the rolling machine as well as for evaluating the coefficient of friction at roller-plate interface. It is observed that maximum force is acting on the roller during the static bending in roll bending process [Gandhi et al. 2008]. In the present study mathematical model for force prediction on the rollers have been developed. Effects of various material properties and geometrical parameters have been studied. It has been concluded that the proposed model can be effectively used to get the roller bending force for given geometrical parameters and material properties. It can also be used to get roller plate interface friction, if the experimental value of roll bending force is available.

Journal of Manufacturing Processes, 2014

Cylindrical as well as conical cross-section structural parts are widely used in industrial appli... more Cylindrical as well as conical cross-section structural parts are widely used in industrial applications worldwide. Such parts are produced from metal plates using many manufacturing methods. 3-roller conical bending process is one such process. In this process first the metal plates in specified blank shapes are given static bending in the rollers. Then the rollers are driven using motors for bending of the blanks under dynamic condition. During bending reaction forces will be there on the rollers. Forces acting on the rollers during the process are transmitted to the machine frame at the roller supports. In the paper an analytical model is developed for the prediction of force during the stage of dynamic bending. The model consists of various parameters like material parameters and geometrical parameters. Experimentation is carried out and the developed model is validated with the experimental results. Effects of various material and geometrical parameters are studied in the present paper. The present work can give insight in the process and can be helpful to the designers as well as to the researchers working in the area of metal forming.

Journal of Mechanical Engineering and Sciences, 2020

The size of material units is especially critical in manufacturing processes where thermal energy... more The size of material units is especially critical in manufacturing processes where thermal energy interacts with the material. The microwave energy is widely used to process the materials in industries such as food processing, chemical, manufacturing etc. due to its unique heating characteristics. In microwave processing, energy is generated and absorbed inside the material during irradiation. The energy absorbed per unit volume of the material depends upon its size. The smaller size candidate materials have more effective surface area to absorb microwave energy than the bulk ones and usually yield lesser defects. This review paper summarizes the fundamentals of size-effect, microwave–materials interaction and input/output parameters in microwave material processing. Further, size-effect in microwave processing of different type of engineering materials (metal based, ceramic based and polymer based) have been discussed in terms of energy absorption and improvement in product attribu...