A Damage Identification Method Based on Differential Gradient of Normalized Strain

Ling Ling Lu, Chen Guang Huang, Xi Wang
2013 Applied Mechanics and Materials  
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
more » ... es 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.
doi:10.4028/www.scientific.net/amm.330.321 fatcat:f7ekmokgsrgdda7jhdabftb254