Simulate nonlinear elastic deformation of magnesium and cobalt by Preisach-Mayergoyz model
Magnesium (Mg) and cobalt (Co) are metals with hexagonal closed packed structure. Mg is a well-know high damping metal. The high damping capacity is related with hysteretic loops at the cyclically load-unload stress-stain curves. Co has similar hysteretic loops at the stress-strain curves. Thus Mg and Co have nonlinear elastic deformation besides normal linear elastic deformation. Their elastic strain at curtain stress cannot be calculated from stress by Hookes law. At this paper, a classic hysteretic model, Preisach-Mayergoyz model (P-M model) was proposed to simulate the nonlinear elastic deformation changed with stress. By this model, the stress-strain curves of Mg and Co after complex deformation history can be calculated or simulated from stress history. Mg samples and Co samples were compressively tested by uniaxial test machine. An extensometer was used to measure strain. Stress-strain curves with hysteretic loops were obtained. From the experimental results, Mg and Cos stress-strain curves does have two properties of P-M hysteretic systems: wiping out and congruency properties. And the calculated stress-strain curves from P-M model agree well with experimental results.
Hongying WANG Aiguo ZHOU
School of Materials Science and Engineering, Henan Polytechnic University, Jiaozuo,Henan 454100, China
国际会议
桂林
英文
1-7
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）