Machining effects on damage evolution in sinter powder metals
The sinter powder metals have found extensive engineering applications in industry.The mechanical property of sinter metals is characterized by high porosity and micro-cracks.Inelastic behavior of the materials is coupled with micro-crack propagation and coalescence of open voids.The machining of sinter metals has significant influence on material behavior.In the present paper the machining effect on damage evolution of sinter iron is investigated under tension and torsion loading conditions experimentally and computationally.The tests indicated that damage of the sinter iron initiated already at a stress level much lower than the macroscopic yield stress.Based on the uniaxial tensile test an elastic-plastic continuum damage model was developed which predicts influence of machining on the damage evolution in the sinter iron under tension and torsion loading conditions.The proposed damage model can reasonably predict the damage evolution under tension loading for sintered iron.Deviation to the torsion damage is significant which implies anisotropic damage evolution.
Sintered metal continuum damage model damage evolution machining effects
S.Ma H.Yuan
Department of Mech.Engineering,University of Wuppertal,Wuppertal 42119,Germany
国际会议
北京
英文
1-11
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）