摘要
用SHPB法测定岩石的动态应力-应变关系时,采用常规的等径冲击存在着明显的P-C振荡,严重地影响试验精度。为消除这种振荡,本文提出,在对岩石进行动态应力-应变全图测试时,应改变径冲头为锥形冲头,同时给出了两种冲头四种岩石的对比实验结果。
In the measurement of dynamic parameters of rocks by SHPB subjected to rectangle loading, Pochhammer-Chree oscillations existed in incident, reflected, and transmitted waves result in a serious oscillation on the dynamic stress-strain curves. In order to eliminate this oscillation , this paper presents that the cylinder impact ram often used in SHPB should be changed into the truncated impact ram. For comparison, experimental results obtained by impact loading of two kinds of impact rams to four types of rocks are given.
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
1993年第2期125-130,共6页
Explosion and Shock Waves
基金
国家自然科学基金
关键词
动态实验
岩石
应力
应变
冲击载荷
the dynamic experimental techniques of rocks, rock dynamics, stress waves