STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL

WANG JiaBin; DING Jun; SONG Kun; HUANG Xia; ZHANG XiaoDi; WANG LuSheng

doi:10.16579/j.issn.1001.9669.2019.05.009

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STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL

更新时间：2022-09-22

- STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL
- Journal of Mechanical Strength Vol. 41, Issue 5, Pages: 1066-1070(2019)
- 作者机构：
  
  1. 重庆理工大学机械工程学院
- 作者简介：
- 基金信息：
- DOI：10.16579/j.issn.1001.9669.2019.05.009
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WANG JiaBin, DING Jun, SONG Kun, et al. STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL. [J]. 41(5):1066-1070(2019)
DOI：

WANG JiaBin, DING Jun, SONG Kun, et al. STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL. [J]. 41(5):1066-1070(2019) DOI： 10.16579/j.issn.1001.9669.2019.05.009.

摘要

为研究20CrMnTi钢的动态应力响应,利用拉伸试验机和分离式霍普金森压杆(SHPB)装置,对20CrMnTi钢进行准静态拉伸和不同应变率下的动态压缩实验。结果表明:20CrMnTi钢具有应变率效应和增塑效应。但在动态压缩实验中20CrMnTi钢对应变率变化不太敏感。考虑绝热温升的影响,对J-C本构模型进行修正。结果显示修正后的J-C本构模型可很好的描述20CrMnTi钢在动态冲击加载下的力学性能,为20CrMnTi钢在高速重载机械零件上的应用提供重要参考。

Abstract

In this paper, the quasi-static tensile tests and the dynamic compression tests of 20 CrMnTi were carried out using the tensile tester and Split Hopkinson pressure bar（SHPB） device at different strain rate to study the dynamic stress response of 20 CrMnTi steel. The results show that 20 CrMnTi steel has strain rate effect and plasticizing effect. But it is not very sensitive to strain rate change within the scope of dynamic compression experiment. In consideration of the adiabatic temperature rise, the Johnson-Cook constitutive model is modified. The results show that the revised Johnson-Cook constitutive model can well describe the mechanical performance of 20 CrMnTi under the dynamic impact load, which is important to reference value that 20 CrMnTi steel is applied under high speed and overload.

关键词

20CrMnTi钢绝热温升J-C本构模型分离式霍普金森压杆

Keywords

20CrMnTi steelAdiabatic temperature riseJ-C constitutive modelSHPB

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Key Laboratory of Green Cutting Technology and Application in Gansu Province,Lanzhou Institute of Technology

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