|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Fracture Characterization in Combined Shear and Tension: Evaluation of Specimen Geometry
||Farinaz Khameneh, Armin Abedini, Cliff Butcher
|On-Site Speaker (Planned)
Existing characterization tests for fracture characterization of automotive sheet metals include shear, uniaxial, plane strain and biaxial tension but a large gap remains between shear and uniaxial. It is presently an open question whether the fracture strain decreases between uniaxial tension and shear or exponentially increases as the triaxiality decreases. Fracture in combined shear and tension is complicated by issues with the lengthscale and edge cracking of the specimens. The novel specimen geometry proposed by Shouler (Shouler & Allwood, 2010) is evaluated and modified to obtain approximately linear strain paths suitable for experimental fracture characterization. Several test geometries were fabricated and evaluated using a DP1180 steel with promising results for fracture characterization in combined tension and shear. The innovation of the proposed sample is based on cut-outs to cause deformation within the gage region to obtain an approximately constant stress triaxiality corresponding to uniaxial tension with a superimposed simple shear.
||Definite: At-meeting proceedings