3D STRESS LOCAL NONDESTRUCTIVE ANALYSIS IN THE MIDDLE PLANE OF A PLATE

作     者：计欣华 任伟 陈金龙 黄羽 秦玉文 

作者机构：Department of MechanicsTianjin UniversityTianjin 300072China 

出 版 物：《Acta Mechanica Sinica》 (力学学报（英文版）)

年 卷 期：1998年第14卷第3期

页      面：283-288页

核心收录：

学科分类：08[工学] 0802[工学-机械工程] 0701[理学-数学] 0801[工学-力学（可授工学、理学学位）] 0702[理学-物理学] 080102[工学-固体力学] 

基　　金：The project supported by the National Natural Science Foundation of China under the Grant No.1380345 

主　　题：3D effect birefringence phase shift Isodyne technique oblique incidence 

摘      要：The Isodyne technique based on the scattered light scanning from a thin laser beam can be used to obtain the information inside the loaded object at the room temperature nondestructively, so it is a very powerful technique in 3D stress analysis. The problems are how to interpret the information and how to get sufficient information from the few interference fringe. Birefringence phase shift technique can distinguish the fringe orders automatically and enrich the information in 256 gray levels between maxim and minim light intensity. The Isodyne birefringence phase shift method with an oblique incidence and equilibrium equation is presented, by which the 3D stresses in the middle plane of a plate with U shape notch are separated successfully. (Edited author abstract) 12 Refs.