冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正J-C本构模型研究

王佳斌; 丁军; 宋鹍; 黄霞; 张晓迪; 王路生

doi:10.16579/j.issn.1001.9669.2019.05.009

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冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正J-C本构模型研究

实验研究·测试技术 | 更新时间：2022-09-22

- 冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正J-C本构模型研究
- STUDIED ON DYNAMIC STRESS RESPONSE OF 20CrMnTi STEEL UNDER IMPACT LOAD AND CONSIDERED FOR ADIABATIC TEMPERATURE RISE MODIFICATION OF THE J-C CONSTITUTIVE MODEL
- 机械强度 2019年41卷第5期页码：1066-1070
- 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：
  
  国家自然科学基金联合基金项目(U1530140);重庆市教育委员会科学技术研究项目(KJ1709224)
- DOI：10.16579/j.issn.1001.9669.2019.05.009
  中图分类号：
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王佳斌, 丁军, 宋鹍, 等. 冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正J-C本构模型研究[J]. 机械强度, 2019,41(5):1066-1070.

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]. 2019,41(5):1066-1070.
王佳斌, 丁军, 宋鹍, 等. 冲击载荷下20CrMnTi钢动态应力响应与考虑绝热温升修正J-C本构模型研究[J]. 机械强度, 2019,41(5):1066-1070. DOI： 10.16579/j.issn.1001.9669.2019.05.009.

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]. 2019,41(5):1066-1070. 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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