摘要
对复合材料层板中椭圆分层的断裂力学问题进行了研究。根据层板平面剪切型分层和反平面剪切型分层尖端附近位移场、应力场与应力强度因子的关系 ,利用法向切片法 ,得到椭圆分层前缘应力强度因子与能量释放率的关系。结合由附加位移所确定的总位能 ,确定了能量释放率和应力强度因子沿分层前缘分布的表达形式。数值计算给出了二者随分层区形状。
The fracture mechanics feature of elliptical delamination in a composite laminate is studied. Using the method of normal slices, the relationship between the stress intensity factor and the energy release rate along the front of the elliptical delamination area was established, based on the stress field and the displacement field in the vicinity of the delamination-tip of the plane shear delamination and anti-plane shear delamination in the composite laminate. The distribution expression of the energy release rate and the stress intensity factor along the front of the elliptical delamination area was obtained, combining with the total potential energy determined by the additional displacements. Computational results show that the distribution of energy release rate and the stress intensity factor are in close relationship with the shape of delamination, the load and the thickness ratio of the laminate.
出处
《复合材料学报》
EI
CAS
CSCD
北大核心
2002年第3期75-82,共8页
Acta Materiae Compositae Sinica
基金
航空科学基金资助项目 (98B5 10 2 6)
