局部压入载荷下有限尺寸薄膜-基底系统的屈曲行为研究OA

The film-substrate system is widely used in various industrial applications,and a comprehensive understanding of its mechanical response under various loads is crucial for optimizing the design and application of flexible electronics and soft robotics.However,the buckling analysis of finite-size film-substrate systems under local indentation remains insufficiently explored,which significantly hinders the practical application and technological advancement of related devices.To address this gap,a combination of experimental testing,numerical simulations,and theoretical analyses was employed to systematically investigate the buckling mechan-ical behavior of finite-size film-substrate systems subjected to local indentation.The findings show that the insta-bility behavior of these systems under local indentation differs markedly from that predicted by finite-size mod-els.Specifically,when the indentation depth exceeds a critical threshold,the film-substrate system undergoes buckling.As the indentation depth increases further,the buckling patterns transition from an initial symmetric state to an asymmetric state.In addition,the buckling behavior can be effectively controlled by adjusting geo-metric parameters and material properties.The results provide essential theoretical insights and technical sup-port for the structural design of flexible electronic devices and soft robotics,as well as for understanding the buckling behavior in natural film-substrate systems.