Dynamic Shear Test Method of Metallic Materials

Yutian DU; Zejian XU; Hongzhi HU; Fenglei HUANG

doi:10.12382/bgxb.2022.0046

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Dynamic Shear Test Method of Metallic Materials

更新时间：2025-08-18

- Dynamic Shear Test Method of Metallic Materials
- Acta Armamentarii Vol. 44, Issue 5, Pages: 1502-1512(2023)
- 作者机构：
  
  北京理工大学爆炸科学与技术国家重点实验室, 北京 100081
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2022.0046
  CLC：
- Received：19 January 2022，
  
  Published Online：19 July 2023，
  
  Published：31 May 2023
- 稿件说明：
移动端阅览
Yutian DU, Zejian XU, Hongzhi HU, et al. Dynamic Shear Test Method of Metallic Materials[J]. Acta Armamentarii, 2023, 44(5): 1502-1512.
DOI：

Yutian DU, Zejian XU, Hongzhi HU, et al. Dynamic Shear Test Method of Metallic Materials[J]. Acta Armamentarii, 2023, 44(5): 1502-1512. DOI： 10.12382/bgxb.2022.0046.

摘要

材料的动态剪切性能参数是进行弹箭及装甲防护系统设计的重要基础。由于目前所采用的拉伸剪切试样在应力均匀性及受力状态方面仍存在问题

给测试结果的准确性带来影响。采用数值模拟对5种常见拉伸剪切试样进行了对比分析

并针对现有问题设计出一种新型拉伸剪切试样。该试样在准静态、动态加载下应力分布均匀而且接近纯剪切的应力状态

适合在大应变率、大应变范围内对材料的剪切力学性能进行准确测试。通过与压缩加载下双剪切试样的测试结果进行对比

发现两种试样获得的应力-应变曲线吻合较好

而且新型试样具有更长的塑性流动段。采用有限元软件对TC4钛合金试样的变形及断裂过程进行了模拟

并通过与高速摄影结果进行对比发现两者剪切区的变形及裂纹扩展情况相互吻合

从而验证了试样设计及数值模拟结果的有效性。

Abstract

The dynamic shear performance parameters of materials are the important basis for the design of missiles

rockets and armor protection systems. However

there are still problems in the stress uniformity and force state of existing tensile shear specimens

which affect the reliability of test results. Five kinds of tensile shear specimens were compared and analyzed by numerical simulations. In order to solve the existing problems

a new type of tensile shear specimen was designed. The stress distribution of the new specimen is uniform for both quasi-static and dynamic loading conditions

and the stress state is close to pure shear

which is suitable for the accurate testing of shear mechanical properties of materials in large ranges of strain rate and strain. Compared with the test results of double shear specimens (DSS) under compressive loading

it was found that the stress-strain curves were in good agreement

and the new specimen had a longer plastic flow stage. Moreover

numerical simulations were performed to study the deformation and fracture processes of the TC4 titanium alloy specimen

and good consistency was observed between the simulation results and the images taken by the high-speed camera. Therefore

the validity of the specimen design and numerical simulation results is further verified.

关键词

Keywords

references

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