| Xinyu WANG |
Beijing Normal-Hong Kong Baptist University
Peoples Rep of China |
| Co-Author(s): Xiaoyi Chen, Hao Wang, Peijun Gan, Junlong Dai, Tianyu Shu, Yuxuan Chen, Fanze Yang, Yongtao Lyu |
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| Abstract: |
| Controlling wrinkling in fiber-reinforced bilayers is critical for applications from anti-aging skincare to skin substitutes. While forward predictions are well-developed, efficient optimization and inverse-design strategies targeting microstructural controls---such as fiber pretension and orientation---remain limited. We develop a mechanics-informed framework to tune wrinkle onset and morphology in a skin-inspired bilayer. Using a semi-analytical morphoelastic plate model, we quantify how five design variables ($h, K, \beta, \lambda_f, \phi_f$) govern the critical wrinkling threshold $g_{10}^*$ and mode number $n^*$. This reduced-order formulation enables high-throughput exploration up to $\phi_f=0.85$, providing a computational basis for large-scale optimization challenging for standard 3D finite element simulations. Global sensitivity and mechanical perturbation analyses identify fiber pretension as the dominant regulator of $g_{10}^*$, while $n^*$ is primarily controlled by thickness and orientation. For optimal inverse design, we implement two complementary routes: (i) a regularized mechanics-based optimization leveraging semi-analytical stability conditions, and (ii) a surrogate-assisted search (BPNN--GA) for global scalability. The resulting designs provide physics-consistent tuning strategies for aging skin models, offering quantitative guidance for personalized, skin-inspired material design. |
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