预应力状态下复合材料板冲击响应数值方法研究
发布时间：2018-08-09 08:32
【摘要】：考虑初始拉伸应力或初始压缩应力的影响,对复合材料层合板的高速冲击响应进行研究。基于显式有限元方法,引入三维Hashin失效准则模拟层内纤维和基体的损伤和演化过程,结合Cohesive单元模拟层间分离破坏过程,建立数值模型,分析不同冲击能量下的预应力复合材料层合板的冲击响应。数值计算结果表明:预应力状态对冲击变形、冲击载荷峰值、冲击极限速度、分层损伤模式和损伤耗能分布均有影响;总体来说,压缩预应力降低了复合材料层合板的抗冲击性能,而拉伸预应力效果不能下定论。作为复合材料冲击过程的重要影响因素,预应力状态必须加以考虑。
[Abstract]:Considering the effect of initial tensile stress or initial compression stress, the high speed impact response of composite laminates was studied. Based on explicit finite element method (FEM), 3D Hashin failure criterion is introduced to simulate the damage and evolution process of fiber and matrix in the layer. The numerical model is established by using Cohesive element to simulate the process of interlaminar separation and failure. The impact response of prestressed composite laminated plates with different impact energy is analyzed. The numerical results show that the prestressing state has an effect on the impact deformation, the peak impact load, the impact limit velocity, the delamination damage mode and the damage energy distribution. Compression prestressing reduces the impact resistance of composite laminates, but the effect of tensile prestressing can not be determined. As an important factor in the impact process of composite materials, the state of prestress must be considered.
【作者单位】： 中国飞机强度研究所结构冲击动力学航空重点实验室;
【分类号】：TB33
，
本文编号：2173517
[Abstract]:Considering the effect of initial tensile stress or initial compression stress, the high speed impact response of composite laminates was studied. Based on explicit finite element method (FEM), 3D Hashin failure criterion is introduced to simulate the damage and evolution process of fiber and matrix in the layer. The numerical model is established by using Cohesive element to simulate the process of interlaminar separation and failure. The impact response of prestressed composite laminated plates with different impact energy is analyzed. The numerical results show that the prestressing state has an effect on the impact deformation, the peak impact load, the impact limit velocity, the delamination damage mode and the damage energy distribution. Compression prestressing reduces the impact resistance of composite laminates, but the effect of tensile prestressing can not be determined. As an important factor in the impact process of composite materials, the state of prestress must be considered.
【作者单位】： 中国飞机强度研究所结构冲击动力学航空重点实验室;
【分类号】：TB33
，
本文编号：2173517
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