Xinghan Qiu , Jiaming Guo , Changguo Wang , Huifeng Tan
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引用次数: 0
Abstract
Theoretical understanding is essential for revealing wrinkling mechanisms, characterizing wrinkle behaviors, and guiding the design of thin films. However, existing studies on stretch-induced wrinkling in thin films still exhibit significant limitations in describing non-uniform wrinkle characteristics and post-buckling bifurcation evolution. This paper presents a novel wrinkle bifurcation theory based on energy methods. An energy model for a single wrinkle stripe is first constructed, and the concept of bifurcation points is introduced to describe the onset of wrinkle evolution. Specifically, the theory addresses typical nonuniform and localized instability modes in rectangular thin films under tension. By decomposing the axial boundary conditions and incorporating both mechanical and geometrical properties, this approach accurately captures spatial wrinkle variations and provides a detailed post-buckling bifurcation analysis. The concept of energy barriers, along with the decomposition of total energy into stretching and bending components, is employed to elucidate the evolution mechanism of wrinkle bifurcation throughout the loading process. This study offers valuable insights for the mitigation and control of wrinkles in rectangular thin film structures.
期刊介绍:
The International Journal of Mechanical Sciences (IJMS) serves as a global platform for the publication and dissemination of original research that contributes to a deeper scientific understanding of the fundamental disciplines within mechanical, civil, and material engineering.
The primary focus of IJMS is to showcase innovative and ground-breaking work that utilizes analytical and computational modeling techniques, such as Finite Element Method (FEM), Boundary Element Method (BEM), and mesh-free methods, among others. These modeling methods are applied to diverse fields including rigid-body mechanics (e.g., dynamics, vibration, stability), structural mechanics, metal forming, advanced materials (e.g., metals, composites, cellular, smart) behavior and applications, impact mechanics, strain localization, and other nonlinear effects (e.g., large deflections, plasticity, fracture).
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