高压物理学报2012，Vol.26Issue(6)：715-720,6.
变截面杆共轴撞击数值分析及其应用前景
Numerical Analysis on the Coaxial Collision of Variable Section Bar and Application Prospect
摘要
Abstract
Abstract: In order to perform extensive research on the coaxial collision of elastic bar, finite element model was established based on LS-DYNA,the influences of the shape parameters of variable section bar on the stress wave were analyzed, producing mechanism of stress wave was discussed, and its ap- plication and development prospect in this field were also explored. The results show that, because of the variable section effect, the coaxial collision of variable section bar under conditions of some shape parameters can create the stress wave, which has the following characteristics:wave front rising is in the form of smooth concave curve, the rising time is longer and there is no waveform oscillations phe nomenon. The characteristics are the intrinsic attributes of the coaxial collision of variable section bar, controlled mainly by minimum radius of variable section scope in bar,and length of variable section scope in bar exerts an influence on the partial difference;besides,the characteristics are not sensitive to the change of the loading speed. The laws obtained by the coaxial collision of variable section bar can be applied to many fields such as waveform shaping. Thus it can be seen,these laws extend the foundational theories, which can be of great theoretical and realistic significance, and moreover,its application prospect is wonderful. Key words : solid mechanics ; stress wave ; variable section bar ; numerical analysis ; split Hopkinson pres- sure bar(SHPB)关键词
固体力学/应力波/变截面杆/数值分析/霍普金森压杆Key words
solid mechanics/stress wave/variable section bar/numerical analysis/split Hopkinson pres- sure bar(SHPB)分类
数理科学引用本文复制引用
罗鑫,许金余,李为民,白二雷..变截面杆共轴撞击数值分析及其应用前景[J].高压物理学报,2012,26(6):715-720,6.基金项目
国家自然科学基金 （）
陕西省自然科学基金 （）
