FATIGUE LIFE ESTIMATION UNDER MULTIAXIAL LOADINGS

In this paper, the fatigue strain energy density parameter for the cri tical plane, proposed by Glinka et al., Fatigue Fract. Engng. Mater. S truct. 1995;18(1):37, is modified so that it can be used to predict th e fatigue life of various materials under multiaxial loading. The mate rial constant in the modified form can be determined by two simple tes ts, e.g. the uniaxial and the pure torsional fatigue tests. To evaluat e the modified parameter, the predicted results are compared with expe rimental data found in literature for SAE-1045 steel reported in Kurat h et al., Multiaxial Fatigue, Analysis and Experiments, SAE, 1989;AE-1 4:12-32 and 304 stainless steel tested by Wu and Yang 3, J. Engng. Mat er. Tech. 1987;109:107. In addition, predictions by several existing m ultiaxial fatigue models are also included for comparison. It is demon strated that the modified fatigue strain energy density parameter yiel ds the most satisfactory result. (C) 1998 Published by Elsevier Scienc e Ltd. All rights reserved.