摘要
采用轴对称动态有限元 HONDO程序对大直径 SHPB装置中压杆横向泊松效应引起的应力波弥散进行二维数值分析 ,并从以下三个方面讨论波形弥散的影响 :(1 ) SHPB装置中压杆直径和杆长对弥散结果 (主要是升时 )的影响 ;(2 )压杆中的波形弥散对试件应力 -应变曲线的影响 ;(3)弥散对试件应变率的影响 .分析表明 ,大直径SHPB弥散效应对实验结果的影响很大 ,必须考虑 .
By using the HONDO Two dimensional dynamic element computer code, the dispersion in wave propagation due to the radial inertia effects in Large diameter SHPB is analyzed. Three questions i.e. the influence of bar diameter and wave propagation distance on the dispersion, the influence of dispersion on stress strain curve and the influence of dispersion on the strain rate of specimen, are discussed. The results of numerical analysis indicate that, when the diameter of SHPB is large, the geometric dispersion effects due to radial inertia become very important.
出处
《实验力学》
CSCD
北大核心
2000年第4期371-376,共6页
Journal of Experimental Mechanics
基金
国防科技重点实验室基金项目!(97JS75 .2 .2 .ZK0 10 2 )
