摘要
利用自主开发的数字全息干涉测量系统针对同类型夹杂物间的干涉效应开展研究.实验获得了较为满意的数字全息干涉图.通过对不同构型的圆孔、椭圆孔和裂纹在同样相当距离下发生的干涉情况的分析、比较可以发现:多夹杂物间均存在不同程度的增强干涉效应或屏蔽干涉效应;在孔洞之间的增强干涉区存在明显的梯度应变条带;当距离不是很近时,裂纹之间的增强干涉效应主要是在裂纹之间形成高应力应变区,改变裂纹的扩展路径,推动裂纹之间的串接.
The interference among the same kind inclusions has been studied with the help of the digital holographic interferometry system. The satisfactory holographic interferograms are obtained by this system. It can be concluded from the interferograms for the circular holes, elliptical holes and cracks at the same equivalent distance that the different amplification effect or shielding effect are always existent among the different inclusions. There exist gradient strain stripes obviously among the holes. When the distance among cracks is not very close, the amplification effect among cracks will mainly lead to high strain field, vary the propagation path of crack and propel the connection among cracks.
出处
《昆明理工大学学报（理工版）》
2007年第5期68-72,共5页
Journal of Kunming University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金项目(项目编号:10462002)
云南省应用基础计划项目(项目编号:2004A0011M
2006A0002Z
2005py01-38)
关键词
数字全息
夹杂物
干涉效应
全息干涉
digital holographic
inclusion
interference
holographic interferometry
