The effect of specimen geometry on the low cycle fatigue life of metallic materials

摘要: The effect of the specimen geometry on measured fatigue life was investigated in this study. Low-cycle tests with hollow and solid specimens were performed differences two different geometries observed. A difference between exists when strain is large diminishes as decreases, which indicates that stems from crack propagation stage rather than initiation stage. Two-dimensional finite element analysis to quantify effects terms stress near tip. Larger internal plastic found. This led a higher energy density could explain lifespan using geometries.