Technical Paper
Design of an In-Plane Shear Test for Fracture Characterization of High Ductility Metals
2024-04-09
2024-01-2858
Fracture characterization of automotive metals under simple shear deformation is critical for the calibration of advanced fracture models employed in forming and crash simulations. Great strides in shear fracture characterization have been made over the past decade with several novel geometries proposed. However, in-plane shear tests of high ductility materials have proved challenging since the edge fails first in uniaxial tension before the shear fracture limit is reached in the center of the sample. Although through-thickness machining is undesirable, particularly for extrusions and castings, it appears required to promote higher strains within the shear zone to avoid edge cracking in materials where the shear fracture limit significantly exceeds that of uniaxial tension. The objective of the present study is to adapt existing in-plane shear geometries, which have otherwise been successful for many automotive materials, to have a local shear zone with a reduced thickness.