Novel experimental procedure and determination of full displacement fields of delaminating composite layer interfaces for evaluation of the mode II cohesive law
Novel experimental procedure and determination of full displacement fields of delaminating composite layer interfaces for evaluation of the mode II cohesive law
复制标题
新颖的实验程序和分层复合层界面全位移场的测定，用于评估 II 型内聚定律
DOI：
10.1016/j.engfracmech.2015.06.060
复制
发表时间：
2015
影响因子：
5.4
通讯作者：
Czél G
中科院分区：
文献类型：
--
作者：
Czél G
本文提出了一种基于简单拉伸加载场景的新型II型断裂试验装置，作为确定复合材料层界面内聚规律的第一步。该程序的关键输出是通过在现场拉伸试验中拍摄的高分辨率扫描电镜图像的相关性获得的完整位移场。对后续应力水平下的完整位移场进行分析，可以对损伤区域进行独特的分析，并直接确定跨界面的位移跳变。下一阶段的工作是评估界面处的剪应力，以确定粘接规律。
A novel mode II fracture test setup based on a simple tensile loading scenario with a discontinuous ply specimen is proposed in the paper as the first step towards determination of the cohesive law of composite layer interfaces. Key outputs of the procedure are the full displacement fields obtained by correlation of high resolution SEM images taken during in-situ tensile tests. Analysis of the full displacement fields at subsequent stress levels allow for unique analysis of the damage zone and direct determination of the displacement jumps across the interface. The next phase of the work is the evaluation of the shear stresses at the interface necessary to determine the cohesive law.