Characterization of strain field distribution in carbon fiber reinforced resin matrix composites using electron beam moiré and geometric phase analysis
Characterization of strain field distribution in carbon fiber reinforced resin matrix composites using electron beam moiré and geometric phase analysis
复制标题
DOI：
10.1016/j.optlaseng.2022.107457
复制
发表时间：
2023
影响因子：
4.6
通讯作者：
J. Zhu;Z. Li;S. Yang;Y.R. Zhao;F. Lang;Y. Xing
中科院分区：
文献类型：
--
作者：
J. Zhu;Z. Li;S. Yang;Y.R. Zhao;F. Lang;Y. Xing
采用原位扫描电子显微镜结合电子束云纹和几何相分析（GPA）技术研究了碳纤维增强树脂基复合材料拉伸过程中的细观和纳米级变形行为。采用电子束光刻技术在复合材料表面制作了间距为359 nm（2780线/mm）的十字光栅，以便于直接测量变形。通过对复合材料拉伸过程的原位观察，确定了复合材料在不同载荷下的应变场分布。在中尺度和纳米尺度下测量和分析了整体应变场和局部应变场.利用GPA表征了载荷作用下基体横向裂纹、纤维间裂纹、层间裂纹和纤维断裂裂纹周围的应变场分布。实验测量了断裂纤维的应变集中系数和无效长度。
Themesoand nanoscopic deformation behavior of the carbon-fiber reinforced resin matrix composite during tensile loading were investigated via in situ scanning electron microscopy combined with the electron beam moiré and geometric phase analysis (GPA) techniques. Electron beam lithography was used to fabricate a cross-grating with a pitch of 359 nm (2780 lines/mm) on the surface of the composite material to facilitate the direct measurement of the deformation. In situ observation of the composite subjected to tension were conducted to determine strain filed distribution under different loads. The global and local strain field were measured and analyzed at themesoand nanoscale. The strain field distribution around matrix transverse crack, cracks between fibers, interlaminar cracks, and broken fiber cracks were characterized via GPA under load. The strain concentration factor and the ineffective length of the broken fiber were also measured experimentally.