高温霍普金森拉杆实验技术研究进展
作者:李尚昆1,2, 胡文军1,2, 徐伟芳1,2, 黄西成1,2, 谢若泽1,2, 陈军红1,2 作者单位:1. 中国工程物理研究院总体工程研究所, 四川 绵阳 621999;
2. 工程材料与结构冲击振动四川省重点实验室, 四川 绵阳 621999 发布时间:2018-10-29 15:51:19 点击数:321

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关键词:高温霍普金森拉杆;高温;实验技术;快速自组装系统
摘要:

高温霍普金森拉杆(SHTB)技术被认为是一种测试材料在高温、102~104 s-1应变率范围内力学性能行之有效的手段。从拉伸波的产生方式、高温动态拉伸实验方法、试样的连接方式和尺寸等方面,对现有的高温SHTB实验技术进行总结和评述,认为其关键在于解决高温对波导杆的影响。现有的方案主要是通过快速加热或快速组装的方式来缩短高温试件与波导杆接触的时间,从而减小波导杆上的温度梯度。在介绍分析两种方案后认为:局部快速加热方法易于实现,但实验中试件的温度一般不超过800℃;快速组装方法实现的实验温度可达1 200℃,但需要一套较为复杂的气动装置。

Research progress on SHTB experiment technique at elevated temperature

LI Shangkun1,2, HU Wenjun1,2, XU Weifang1,2, HUANG Xicheng1,2, XIE Ruoze1,2, CHEN Junhong1,2

1. Institute of Systems Engineering, China Academy of Engineering Physics, Mianyang 621999, China;
2. Shock and Vibration of Engineering Materials and Structures Key Laboratory of Sichuan Province, Mianyang 621999, China

Abstract: The split Hopkinson tension bar (SHTB) experiment technique is thought as an efficient way to evaluate the dynamic tension properties in the range of strain rates from 102-104 s-1 at elevated temperature. The features of SHTB experiment technique at elevated temperature are summarized and reviewed from the aspects of the generation of tensile wave, elevated temperature dynamic tensile test method, specimen connection mode and size. It is considered that the key problem is to solve the influence of elevated temperature on waveguide rod. The existing schemes mainly shorten the contact time between the high temperature specimen and the waveguide rod by means of rapid heating or rapid assembly, thereby reducing the temperature gradient on the waveguide rod. The merits and demerits of those methods have been analyzed. The rapid heating method is easier to carry out, but it is only suit for the temperature no more than 800℃. And the rapid assembly method can achieve more than 1 200℃, but it needs a complicated actuator and hard to realize.

Keywords: SHTB;elevated temperature;experiment technology;synchronically actuator assembled system

2018, 1900-02-12(10): 35-42  收稿日期: 2018-04-24;收到修改稿日期: 2018-05-19

基金项目: 国家自然科学基金(11472257,11572299);中物院创新基金(2017cxj07)

作者简介: 李尚昆(1992-),男,河南新乡市人,硕士,主要从事冲击动力学、固体力学研究

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