摘要
本文研究了用应变片测定Charpy裂纹试样动态断裂启裂点的方法,在不同的试验温度下,用双通道高速采样磁盘存储示波器同时测定了冲击试样的P—t曲线和裂纹尖端区域的名义ε—t曲线,结合动态有限元对Charpy裂纹试样冲击过程的模拟结果,分析了动态断裂韧性的测定方法,并指出了以往动态断裂韧性测定中存在的问题。
The method to detect the crack initiation point of Charpy pre-cracked specimen
under dynamic loading was studied using strain gauge. The load-time curve and nominal
strain-time curve at the crack tip for impact testing specimens may be simultaneously measured
by twin-channel oscilloscope with high speed sampling and diskette storing. Based on the dy-
namic finite element simulation of impact response of Charpy specimen, the measuring method
of dynamic fracture toughness was analysed and some problems in previous dynamic fracture
toughness measurement were discussed.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
1992年第4期A170-A175,共6页
Acta Metallurgica Sinica
关键词
启裂点
应变片
动态
断裂韧性
crack initiation point
strain gauge
dynamic fracture toughness
