Prediction of the fracture strength of notched continuous fiber-reinforced laminates by interlaminar crack extension analysis
Prediction of the fracture strength of notched continuous fiber-reinforced laminates by interlaminar crack extension analysis
复制标题
通过层间裂纹扩展分析预测有缺口的连续纤维增强层合板的断裂强度
DOI：
10.1016/0266-3538(95)00132-8
复制
发表时间：
1996
影响因子：
9.1
通讯作者：
H. Sekine
中科院分区：
文献类型：
--
作者：
S. Kamiya;H. Sekine
针对任意层合几何形状的有缺口连续纤维增强复合材料层合板的层间裂纹扩展问题，对其断裂强度进行了预测。首先推导了层间裂缝前缘某点能量释放率的方程。然后，在能量释放速率恒定的条件下，对分层区的扩展行为进行了数值模拟。考虑其与层内裂纹的相互作用以及层内纤维的概率破坏过程，模拟的层板断裂行为与实验结果吻合较好。这些模拟结果导致层合板的断裂强度预测，该预测被证明在各种层合几何形状上都足够精确。
The fracture strength of notched continuous fiber-reinforced composite laminates with arbitrary lamination geometry has been predicted by focusing on the interlaminar crack extension around notches. An equation was first derived which evaluated the energy release rate at a point on the interlaminar crack front. Then, under the condition of constant energy release rate, a numerical simulation was carried out of the extension behavior of the delaminated zone. Taking account of its interaction with intralaminar cracks and the probabilistic failure process of fibers inside the delaminated zone, the simulated fracture behavior of laminates was found to be in good agreement with experimental results. These simulation results lead to a fracture-strength, prediction for laminates which is proved to be sufficiently precise over a wide-ranging variety of lamination geometries.