Plastic Strain Energy of CuZn37 Brass in Low-Cycle Multiaxial Fatigue Regime

摘要

This paper presents the results of a plastic strain energy calculations for the CuZn37 brass under multiaxial fatigue loading. Fatigue tests were performed on the hollow specimens subjected to fully reversed tension-compression, torsion, proportional loading, 90° out-of-phase non-proportional loading and two another non-proportional loadings with frequency differences. All test were strain-controlled. Calculations of a strain energy were based on midlife strain hysteresis loops data and Ramberg-Osgood equation constants. Some tests are observed by thermographic camera. The plastic strain energy was also determined on the base of the specimen surface temperature. All results were compared and discussed.