Analysis of heat generation under plastic deformation, crack initiation and propagation

Abstract

In order to evaluate the plastic deformation of mechanical members, we pay attention to surface temperature that is generated by plastic deformation. Most of the plastic energy exhausted by plastic deforming is conterted into heat. The distributions of the heat generation represent the microscopic plastic deformed intensity. In the present study, the tensile tests were performed on stainless steel (SUS304) plate with a center crack. We measured the distributions of surface temperature by using the thermocouple and thermograpy (TVS: Thermal Video System) under the plastic deformation and crack propagation. Furthermore FEM elasto- plastic analysis coupled with transient heat condition analysis was performed. The analytical results were good agree with the experimental ones and the propriety of this non-contact measurement system of plastic deformation and fracture process by theromgraphy system was shown.