[1]许浩翔,姚文进,李文彬.超高强度钢G31的动态力学性能及断裂阈值[J].弹道学报,2020,32(01):71-76.[doi:10.12115/j.issn.1004-499X(2020)01-010]
 XU Haoxiang,YAO Wenjin,LI Wenbin.Dynamic Mechanical Properties and Fracture Thresholdof Ultra-high Strength Steel G31[J].Journal Of Ballistics,2020,32(01):71-76.[doi:10.12115/j.issn.1004-499X(2020)01-010]
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超高强度钢G31的动态力学性能及断裂阈值()
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《弹道学报》[ISSN:1004-499X/CN:32-1343/TJ]

卷:
32
期数:
2020年01期
页码:
71-76
栏目:
出版日期:
2020-03-31

文章信息/Info

Title:
Dynamic Mechanical Properties and Fracture Thresholdof Ultra-high Strength Steel G31
文章编号:
1004-499X(2020)01-0071-06
作者:
许浩翔姚文进李文彬
南京理工大学 机械工程学院,江苏 南京 210094
Author(s):
XU HaoxiangYAO WenjinLI Wenbin
School of Mechanical Engineering,Nanjing University of Science and Technology,Nanjing 210094,China
关键词:
侵彻弹 超高强度钢 动态力学性能 温度软化 本构方程 绝热剪切
Keywords:
penetrating projectile ultra-high strength steel dynamic mechanical properties temperature softening constitutive equation adiabatic shear
分类号:
O347.3
DOI:
10.12115/j.issn.1004-499X(2020)01-010
文献标志码:
A
摘要:
为了研究超高强度钢G31的动态力学性能,通过对G31钢进行动、静态力学性能实验,得到G31钢的动、静态力学性能,并由实验数据拟合得到了G31钢的本构方程。通过金相显微镜观察了实验前后试样的金相图。结果表明:在动态压缩条件下,G31的力学行为表现为变形初期的应变强化阶段和变形后期的温度软化阶段; 在变形后期实验曲线与拟合本构方程曲线有较大差异。仿真对比分析结果证实,变形温升是造成该差异的主要原因。观察金相图发现,材料在较高应变率下发生绝热剪切断裂,并由相关理论计算得到了试件的绝热剪切断裂阈值范围。
Abstract:
In order to study the dynamic mechanical properties of ultra-high strength steel G31,the dynamic and static mechanical properties of G31 were obtained through the dynamic and static mechanical properties experiments of G31,and the constitutive equation of G31 was obtained by fitting the experimental data. The metallographic images of the samples before and after the experiment were observed by metallographic microscope. The results show that under the condition of dynamic compression,the mechanical behavior of G31 shows the strain strengthening stage in the early stage of deformation and the temperature softening stage in the late stage of deformation. The experimental curve in the late stage of deformation is quite different from the fitted constitutive equation curve. The simulation results show that the deformation temperature rise is the main reason for the difference. The results show that the adiabatic shear fracture occurs at high strain rate. The threshold range of adiabatic shear fracture was calculated by related theory.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2019-08-19
基金项目:国家自然科学基金项目(11602111)
作者简介:许浩翔(1994- ),男,硕士研究生,研究方向为金属动态力学行为及损伤演化。E-mail:njustxhx@163.com。
通信作者:姚文进(1981- ),男,教授,研究方向为弹药总体与高效毁伤技术。E-mail:njyaowj@163.com。
更新日期/Last Update: 2020-03-30