A Damage Identification Method based on Differential Gradient of Normalized Strain

摘要：

　　A damage identification method based on differential gradient of normalized strain (DGNS) is presented to overcome the disadvantages of traditional static damage identification,such as the complicacy of measurement system and the limited measurement points etc.Two numerical simulations were conducted on a dog-bone specimen to verify the feasibility of the method.In the experiment,differential of strain contour density (DSCD),which has the same physical meaning with DGNS,significantly improves the smoothness and visualization of field information.Both the simulation and experiment results show that,DGNS (DSCD) is capable of describing the structural damage property meanwhile effectively isolates the damaged areas from regions with inhomogeneous deformation due to geometric inhomogeneity.Moreover,DGNS (DSCD) is a structural intrinsic parameter,and independent on external loads.

关键词： Structural Health Monitoring (SHM) Damage Identification Differential Gradient of Normalized Strain (DGNS) Differential of Strain Contour Density (DSCD) Digital Image Correlation(DIC)

作者: Lu Lingling Huang Chenguang Wang Xi

作者单位: Key Laboratory of Hydrodynamics and Ocean Engineering Institute of Mechanics Chinese Academy of Sciences Beijing, China

会议类型: 国际会议

会议名称: 2nd International Conference on Materials Engineering and Automatic Control (第二届材料工程与自动化控制国际会议)(ICMEAC2013)

会议地点: 济南

会议语种:英文

页码: 321-330

在线出版日期: 2013-05-18（万方平台首次上网日期，不代表论文的发表时间）