Author:
Xu Teng,Xia Qin-xiang,Qi Zhen-jie,Wu Xiao-yu,Ran Jia-qi,Gong Feng
Abstract
Abstract
The cruciform two-axial tensile specimen was designed and the two-axial tensile test scheme for different strain paths was developed. The effect of strain paths on the forming limit of high strength structural steel plates was obtained by the DIC method. The results show that for the unidirectional alternating loading test scheme, the equivalent strain of the ultimate strain is less than the sum of the equivalent strains from each step. When the main strain direction of the specimen pre-strain is perpendicular to the final strain path, the forming limit decreases with the increase of the pre-strain.
Subject
General Physics and Astronomy
Reference8 articles.
1. An evaluation of a combined isotropic-kinematic hardening model for representation of complex strain-path changes in dual-phase steel;Tarigopula;European Journal of Mechanics - A/Solids,2009
2. Material Characterization of Hybrid Composite: Experimental Using Strain Gauge/DIC with Finite Element Modelling Macro/Micro Scale;Ghani;Key Engineering Materials,2017
3. Anisotropic fracture forming limit diagram considering non-directionality of the equi-biaxial fracture strain;Park;International Journal of Solids and Structures,2018
4. Strain harding behavior of TRIP steels under non-proportional loading path;Yu;Journal of Plastic Engineering,2012
5. Fast Adaptive Augmented Lagrangian Digital Image Correlation;Yang;Advancement of Optical Methods & Digital Image Correlation in Experimental Mechanics,2018