含面\芯开裂损伤复合材料夹层板考虑几何非线性的能量释放率数值分析

基金项目: 国家自然科学基金委资助项目(59975014)

详细信息

NUMERICAL ANALYSIS OF ENERGY RELEASE RATE FOR COMPOSITE SANDWICH PLATE WITH AN INTERFACIAL CRACK CONSIDERING GEOMETRIC NONLINEARITY

State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian 116024

摘要

摘要: 基于一阶剪切变形理论,zig-zag变形假定和von Karman大挠度理论,提出了含不同形状面\芯开裂损伤复合材料夹层板在受压缩载荷作用下的开裂前缘能量释放率研究的有限元分析方法,研究了在轴向应变作用下,具有面\芯开裂损伤复合材料夹层板的分层断裂力学行为,并讨论了在大变形下几何非线性对能量释放率分布规律的影响。通过典型算例分析表明:具有面\芯开裂损伤复合材料夹层板的分层前缘能量释放率的大小和分布规律与开裂面积、开裂形状和受载方向有关。
- 几何非线性 /
- 复合材料夹层板 /
- 界面开裂 /
- 能量释放率
Abstract: Based on the zig-zag deformation model, the first order shear strain effect laminated plate theory and the von Karman non-linearity assumption, a finite element method for fractural analysis of the debonded sandwich composites is developed. The total energy release rate can be estimated by a virtual crack closure technique (VCCT). The delamination fracture behavior of the sandwich plates containing an different shape interfacial crack under compression is studied. From some typical numerical examples and discussions, it can be seen that the magnitude and distribution of the energy release rate along the crack front are dependent on the crack area, shape and loading orientation.
- geometrical non-linearity /
- composite sandwich /
- interfacial crack /
- energy release rate