Post buckling behavior of porous magneto-electro-elastic nanoplates using nonlocal strain gradient theory

作者：Fan Yang, Yikun Deng, Jinhai Wang, Jiahao Huo, Tao Zhang · 发表于：Results in Engineering · 年份：2025 · DOI：10.1016/j.rineng.2025.106446 · 被引用次数：9 · 研究领域：Nonlocal and gradient elasticity in micro/nano structures、Composite Structure Analysis and Optimization、Microstructure and mechanical properties

• The post buckling behavSior of PMEE nanoplates under multi field coupling was studied. • The surface effects of PMEE nanoplates were explained using nonlocal strain gradient. • Discussed how porosity and external electric and magnetic fields affect post-buckling. • The post bending load is highly sensitive to changes in porosity. • Electric and magnetic field changes greatly affect the post-buckling behavior. This study investigates the post buckling behavior of porous magneto-electro-elastic (MEE) nanoplates under combined mechanical, electrical, and magnetic loading using nonlocal strain gradient theory (NSGT). This study uniquely combines NSGT with pore effects. By integrating the Mindlin plate theory with the Hamilton principle, the governing equations are derived, and the Galerkin weighted residual method is utilized to solve the problem. The analysis systematically examines the effects of porosity (including distribution patterns and volume fraction), size-dependent effects (nonlocal/strain gradient parameters), and multi-field coupling mechanisms. Key findings reveal that symmetric porosity configurations enhance the critical buckling load by approximately 30 % compared to asymmetric structures at the same porosity level. The size effects demonstrate a competing influence: strain gradient hardening improves buckling resistance, while non local softening will reduce its strength, leading to a change in post buckling performance of >20 %. This work quantifies how elect...