Compressive test and numerical simulation of center-notched composite laminates with different crack configurations
Compressive test and numerical simulation of center-notched composite laminates with different crack configurations
复制标题
不同裂纹形态的中心缺口复合材料层合板的压缩试验与数值模拟
DOI：
10.1002/pc.23855
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发表时间：
2017-12-01
影响因子：
5.2
通讯作者：
Zhang Qian
中科院分区：
文献类型：
--
作者：
Ge Mingming;Cheng Xiaoquan;Zhang Qian
对薄心缺口复合材料层合板在轴向压缩载荷作用下的力学性能进行了试验和计算研究。对不同裂纹长度和加载方向与0°纤维方向夹角的复合材料进行了一系列压缩试验。通过试验获得了损伤机理和荷载-位移曲线，分析了裂纹尺寸对应力分布和极限荷载的影响。结果表明，当裂纹角从0°增加到90°时，复合材料的抗压强度急剧下降。通过对测试试件断口的研究发现，层合板中的所有初始裂纹都在没有直线裂纹路径的情况下扩展，直到纤维同时断裂。利用ABAQUS软件进行了三维渐进损伤有限元分析，模拟了不同裂纹尺寸下的裂纹扩展情况。数值模拟定性地再现了实验室实验中的一般观测结果。波兰姆。公司，2015年。©2015塑料工程师学会
Experimental and computational studies of the composite laminates with thin center notches under axial compressive loading are carried out. A series of compressive testing of the composites with different crack lengths and angles between the loading vector and 0° fiber direction were conducted. The damage mechanisms as well as load-displacement curves are obtained from the test to analyze the effects of crack dimensions on stress distribution and ultimate load. It was shown that the compressive strength of composites drastically reduces when the crack angle goes from 0° to 90°. By studying the fracture surfaces of the tested specimens, all initial cracks within the laminates are found to extend without a straight crack path until fibers fracture simultaneously. Cases that involve crack propagation are modeled for different crack dimensions with a 3D progressive damage finite element analysis (FEA) using the Abaqus. Numerical simulations qualitatively reproduce the general observations made in the laboratory experiments. POLYM. COMPOS., 2015. © 2015 Society of Plastics Engineers