东南大学学报（英文版）2016，Vol.32Issue(1)：73-77,5.DOI:10.3969/j.issn.1003-7985.2016.01.013
基体裂纹异型夹杂相互作用动态焦散线实验研究
Dynamic caustics experimental study on interaction between propagating crack and deformity inclusions in primary structure
摘要
Abstract
The approach combining the dynamic caustics method with high-speed photography technology is used to study the interaction between propagating cracks and three kinds of deformity inclusions cylinder inclusion quadruple inclusion and triangular inclusion under low velocity impact loading. By recording the caustic spots of crack tips at different moments during the crack propagation the variation regulations of dynamic stress intensity factors DSIF and crack growth velocity with respect to time are obtained.The experimental results show that the resistance effects to crack growth are varied with different shapes of inclusions in specimens and the quadruple inclusion’s effect is more apparent.The distortion degree of caustic spots is affected by the shapes of inclusions as well and the situation is more serious for cylinder and quadruple inclusions. The overall values of DSIFs of triangular inclusion specimen are greater than the others and the crack growth velocities characteristic sizes and DSIFs show processes of fluctuations because of the disturbance of reflection waves in specimens. The results provide an experimental basis for the analysis of strength and impact-resistance ability in structures with deformity inclusions.关键词
动态焦散线/异形夹杂/动态应力强度因子/裂纹扩展速率Key words
dynamic caustics/deformity inclusion/dynamic stress intensity factor DSIF/crack propagation velocity分类
数理科学引用本文复制引用
岳中文,韩瑞杰,张旺,刘伟..基体裂纹异型夹杂相互作用动态焦散线实验研究[J].东南大学学报（英文版）,2016,32(1):73-77,5.基金项目
The National Natural Science Foundation of China No．5137421051134025 the 111 Project No．B14006． （）
