不锈钢材料的动态力学性能及本构模型

尚兵; 盛精; 王宝珍; 胡时胜

doi:10.11883/1001-1455(2008)06-0527-05

不锈钢材料的动态力学性能及本构模型

doi: 10.11883/1001-1455(2008)06-0527-05

1.
中国科学技术大学中国科学院材料力学行为和设计重点实验室，安徽合肥 230026；
2.
湖北汽车工业学院机械系，湖北十堰 442002

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出版历程
- 刊出日期: 2008-11-25

Dynamic mechanical behavior and constitutive model of stainless steel

1.
Key Laboratory of Mechanical Behavior and Design of Materials, Chinese Academy of Sciences, University of Science and Technology of China, Anhui 230026, Hefei, China;
2.
Department of Machine, Hubei Automotive Industries Institute, Shiyan 442002, Hubei, China

摘要

摘要: 利用带有温度调控系统的SHPB实验装置测定了0Cr17Mn5Ni4Mo3Al不锈钢在3种应变率(300、1 000、2 700 s-1)、4种环境温度（25、300、500和700 ℃）下的应力应变关系；在液压伺服材料试验机(MTS)上进行了3种温度下的准静态（0.0005 s-1）压缩实验。实验结果表明：该不锈钢有明显的应变率强化效应和温度软化效应，并且随着环境温度的升高，应变率强化效应减弱。对Johnson-Cook模型进行了修正，考虑了冲击过程中绝热温升引起的软化效应。修正后的Johnson-Cook模型与实验结果吻合较好。
- 固体力学 /
- 本构关系 /
- SHPB /
- 不锈钢 /
- Johnson-Cook模型 /
- 温度效应 /
- 应变率效应
Abstract: Stress-strain curves of 0Cr17Mn5Ni4Mo3Al,at three Strain rates of 300,1 000,2 700 s-1 and four temperatures of 25,300,500,700 ℃ were experimentally obtained by using the split Hopkinson pressure bar equipped with a temperature controller.And the quasi-static experiment (0.000 5 s-1) was done in the material test system at three temperatures of 25,300,500 ℃.Experimental results show that the flow stress decreases with temperature but increases with strain and strain rate.The traditional Johnson-Cook model was modified considering the thermal softening caused by the impact adiabatic process. The modified Johnson-Cook model is in good agreement with the experimental results.
- solid mechanics /
- constitutive model /
- SHPB /
- stainless steel /
- Johnson-Cook model /
- temperature effect /
- strain rate effect

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