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Multiscale design of nonlinear materials using reduced-order modeling

xiangzhang's picture

Dear colleagues, 

We recently pablished a paper titled "Multiscale design of nonlinear materials using reduced-order modeling", which might be interesting to you. The paper is freely accessible by this link through 09/24/2022 on Elsiver, and an author's copy is here. The abstract is attached below. Thank you for your interest. 



Abstract: A two-step optimization method is proposed for the efficient multiscale design of heterogeneous materials whose nonlinear macroscopic response is driven by volumetric and interfacial damage taking place at the microstructural level. The Eigendeformation-based reduced-order Homogenization Method (EHM) is used in a reduced-order design phase, allowing for a preliminary design that combines multiple initial configurations with a gradient-based optimization method. The preliminary design is then adopted to initialize a high-fidelity optimization phase based on the Interface-Enriched Generalized Finite Element Method (IGFEM) to arrive at the final design. The analytic sensitivities of EHM with respect to nonlinear material properties are derived to drive the gradient-based algorithm. Several multiscale optimization problems of increasing complexity are presented to illustrate the efficiency of the proposed method using an objective function based on stress error relative to a desired stress–strain response.


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