Nonlinear elastic deformation of magnesium and cobalt by Preisach-Mayergoyz model  

Preisach-Mayergoyz模型分析金属镁与钴的非线性弹性变形(英文)

作　　者：李良[1] 王红英[1] 周爱国[1] 

机构地区：[1]河南理工大学材料科学与工程学院,焦作454100

出　　处：《Transactions of Nonferrous Metals Society of China》2012年第9期2220-2225,共6页中国有色金属学报（英文版）

基　　金：Projects (51002045, 10947105) supported by the National Natural Science Foundation of China;Project (2010B430016) supported by the Nature Science Research Project of Education Department of Henan Province, China;Project (2012IRTSTHN007) supported by Program for Innovative Research Team (in Science and Technology) in the University of Henan Province, China

摘　　要：A classic hysteretic model, Preisach-Mayergoyz model （P-M model）, was used to calculate the nonlinear elastic deformation of magnesium （Mg） and cobalt （Co）. Mg and Co samples in cylinder shape were compressively tested by uniaxial test machine to obtain their stress—strain curves with hysteretic loops. The hysteretic loops do have two properties of P-M hysteretic systems： wiping out and congruency. It is proved that P-M model is applicable for the analysis of these two metals’ hysteresis. This model was applied on Mg at room temperature and Co at 300 ℃. By the P-M model, Co and Mg nonlinear elastic deformation can be calculated based on the stress history. The simulated stress—strain curves agree well with the experimental results. Therefore, the mechanical hysteresis of these two metals can be easily predicted by the classic P-M hysteretic model.应用一个经典滞后模型Preisach-Mayergoyz模型(P-M模型)计算金属镁与钴的非线性弹性变形,模拟这两种金属的应力—应变曲线中的滞后环。分析实验所获取的应力—应变曲线,金属镁和钴的力学滞后具有成为P-M滞后的2个充分必要条件:抹除性和一致性。它们的力学滞后可以应用P-M模型分析。证明了金属镁这种重要的结构材料的非线性弹性变形具有这种特性,钴在300℃的高温下具有这种性能。P-M模型提供了一种简单的方法计算这两种金属的非线性弹性变形。模拟计算的结果和实验结果吻合良好。

关 键 词：MAGNESIUM COBALT nonlinear elastic deformation Preisach-Mayergoyz model 

分 类 号：TG146.22[一般工业技术—材料科学与工程]