Damage and fracture resistance of continuous fiber-reinforced cross-ply composites.
Damage and fracture resistance of continuous fiber-reinforced cross-ply composites.
复制标题
连续纤维增强交叉层复合材料的损伤和断裂抗力。
DOI：
10.1299/kikaia.56.930
复制
发表时间：
1990
期刊：
影响因子：
--
通讯作者：
H. Sekine
中科院分区：
文献类型：
--
作者：
S. Kamiya;H. Sekine
连续纤维增强正交铺层复合材料缺口前端的损伤是由平行于纤维方向的微裂纹组成的。我们将注意力集中在这些微裂纹的行为上，以便阐明驱动微裂纹的基本因素，即：例如，控制损伤区域的扩展行为。我们首先确定定量的损伤状态的参数，这是局部微裂纹密度平均在试样的厚度，我们推导出宏观材料的符合性和微裂纹扩展所释放的弹性应变能的增量之间的关系。在假设微裂纹扩展过程受能量释放控制的前提下，对损伤扩展过程进行了计算机模拟，模拟结果与实验结果基本一致。最后得出结论：连续纤维增强正交铺设复合材料的损伤扩展实质上是弹性应变能的释放。
Damage ahead of notch tips in continuous fiber-reinforced cross-ply composites consists of microcracks extendibg in the directions parallel to fibers in each ply. We direct our attention to the behaviour of these micrcracks in order to clarify the essential factor which drivdes microcracks, i. e., governs the extension behaviour of the damage region. We first determine quantitatively the state of damage with parameters which are local microcrack densities averaged over the thickness of the specimen, and we derive the relation between the increment of macroscopic material compliance and the elastic strain energy released by microcrack extension. With an assumption that the released energy would control the process of microcrack extension, a computer simulation of damage extension is carried out and its results appear to be in agreement with experimental results. We finally come to the conclusion that the damage extension in continuous fiber-reinforced cross-ply composites is essentially the release of elastic strain energy.