ZOUBIDA SEKKATE - Academia.edu (original) (raw)
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Papers by ZOUBIDA SEKKATE
Mechanics of Advanced Materials and Structures, 2020
The never-ending struggle to design new materials for supporting innovative engineering requireme... more The never-ending struggle to design new materials for supporting innovative engineering requirements gives composites a worthy focus. This endeavor is challenged by the anisotropic nature of composite material that needs virtual simulations based on non-linear multi-scale modeling. Unfortunately, to accurately characterize the nonlinear behavior of composite materials and to determine the optimized design, the existing micromechanical models are not up to the challenge. Therefore, there is a pressing need to help design engineers getting a clear view of their strengths and weaknesses both from the perspective of their ground hypotheses and their predictive capabilities. This work addresses this goal by ascertaining the accuracy of both prominent and recent micromechanical models and subsequently emphasizes the capability scope of each model. In effect, the different conclusions are summarized in a table. The drawn conclusion is that yet no particular micromechanical model could yield good estimates for different heterogeneous materials and various operating conditions; due mainly to the limitations of their underlying hypotheses even in the linear case. That leads us to argue that the development of a comprehensible linear model with a clear physical background is needed more than ever to help us circumvent the intricacy of the extension to the non-linear case.
Key Engineering Materials, 2019
Composite materials offer potential avenues for tailoring materials with desired properties inten... more Composite materials offer potential avenues for tailoring materials with desired properties intended to innovative applications. To speed up this scheme, trial and error practice is evolving to a more rational and organized material design process. This trend depends on our ability to bridge the micro-scale to the system level. An important brick of this process is constituted of micromechanical models that bridge the gap between micro and macro scales in materials. Unfortunately, to forecast the behavior of complex composite materials microstructures, these models remain rudimentary, particularly for the nonlinear regime. Accordingly, our ambition is to highlight the limitations of existing micromechanical models and examine their respective capabilities to predict elastoplastic behavior of composite materials. The assessment reveals that in order to reduce the disparity between micromechanical models predictions and corresponding numerical or experimental results, new robust and e...
Composite materials are the preeminent drivers for the significant enhancement to products that m... more Composite materials are the preeminent drivers for the significant enhancement to products that meet recent industrial requests. Nevertheless, their variability and the complexity of the innovative products introduce a great challenge in predicting the mechanical response fundamental for the composite design engineering. Then, to pledge a faster and more cost-effective development product, the experimental practice is switched to virtual simulation tools using advanced multi-scale analyses techniques. Indeed; developing predictive micromechanical models that enable to derive the composites’ macroscopic behavior in realistic environment based on the microscopic behavior of each constituent is obviously defiance. Therefore, to evaluate the micromechanical response of complex composite materials which are mainly nonlinear, a new micromechanical model is proposed to meticulously typify the elastoplastic behavior of composite materials and determine the optimized design. The model is dev...
Mechanics of Advanced Materials and Structures, 2020
The never-ending struggle to design new materials for supporting innovative engineering requireme... more The never-ending struggle to design new materials for supporting innovative engineering requirements gives composites a worthy focus. This endeavor is challenged by the anisotropic nature of composite material that needs virtual simulations based on non-linear multi-scale modeling. Unfortunately, to accurately characterize the nonlinear behavior of composite materials and to determine the optimized design, the existing micromechanical models are not up to the challenge. Therefore, there is a pressing need to help design engineers getting a clear view of their strengths and weaknesses both from the perspective of their ground hypotheses and their predictive capabilities. This work addresses this goal by ascertaining the accuracy of both prominent and recent micromechanical models and subsequently emphasizes the capability scope of each model. In effect, the different conclusions are summarized in a table. The drawn conclusion is that yet no particular micromechanical model could yield good estimates for different heterogeneous materials and various operating conditions; due mainly to the limitations of their underlying hypotheses even in the linear case. That leads us to argue that the development of a comprehensible linear model with a clear physical background is needed more than ever to help us circumvent the intricacy of the extension to the non-linear case.
Key Engineering Materials, 2019
Composite materials offer potential avenues for tailoring materials with desired properties inten... more Composite materials offer potential avenues for tailoring materials with desired properties intended to innovative applications. To speed up this scheme, trial and error practice is evolving to a more rational and organized material design process. This trend depends on our ability to bridge the micro-scale to the system level. An important brick of this process is constituted of micromechanical models that bridge the gap between micro and macro scales in materials. Unfortunately, to forecast the behavior of complex composite materials microstructures, these models remain rudimentary, particularly for the nonlinear regime. Accordingly, our ambition is to highlight the limitations of existing micromechanical models and examine their respective capabilities to predict elastoplastic behavior of composite materials. The assessment reveals that in order to reduce the disparity between micromechanical models predictions and corresponding numerical or experimental results, new robust and e...
Composite materials are the preeminent drivers for the significant enhancement to products that m... more Composite materials are the preeminent drivers for the significant enhancement to products that meet recent industrial requests. Nevertheless, their variability and the complexity of the innovative products introduce a great challenge in predicting the mechanical response fundamental for the composite design engineering. Then, to pledge a faster and more cost-effective development product, the experimental practice is switched to virtual simulation tools using advanced multi-scale analyses techniques. Indeed; developing predictive micromechanical models that enable to derive the composites’ macroscopic behavior in realistic environment based on the microscopic behavior of each constituent is obviously defiance. Therefore, to evaluate the micromechanical response of complex composite materials which are mainly nonlinear, a new micromechanical model is proposed to meticulously typify the elastoplastic behavior of composite materials and determine the optimized design. The model is dev...