西南交通大学学报 2008, 43(1) 67-70 DOI:     ISSN: 0258-2724 CN: 51-1277/U

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本文关键词相关文章
混凝土
SHPB试验
数值模拟
应力
均匀性
本文作者相关文章
曹吉星
陈虬
张吉萍
PubMed
Article by CAO Jixing
Article by CHEN Qiu
Article by ZHANG Jiping

混凝土SHPB试验的数值模拟及应力均匀性

曹吉星1, 陈虬1, 张吉萍1,2

1. 西南交通大学应用力学与工程系, 四川, 成都, 610031;
2. 浙江海洋学院船舶与建筑工程学院, 浙江, 舟山, 316000

摘要

用显式动力有限元软件LS-DYNA,模拟C100与C80高强混凝土SHPB试验过程.混凝土采用H-J-C本构模型.得到了与试验结果比较吻合的应力-应变关系曲线.根据模拟结果分析了SHPB试验中C100混凝土试件的应力均匀性.结果表明,混凝土试件在破坏前一段时间内,应力有一定的不均匀性,因此会造成试验结果的误差.

关键词 混凝土   SHPB试验   数值模拟   应力   均匀性  

Simulation of SHPB Test on Concrete and Uniformity of Stresses

CAO Jixing1, CHEN Qiu1, ZHANG Jiping1,2

1. Dept.of Appl.Mechanics and Eng., Southwest Jiaotong University, Chengdu 610031, China;
2. School of Naval Architecture and Civil Eng., Zhejiang Ocean University, Zhoushan 316000, China

Abstract:

Split Hopkinson pressure bar(SHPB) tests on C100 and C80 concrete specimens were simulated with explicit dynamic finite element software LS-DYNA.The concrete specimens were simulated with the Johnson-Holmquist-concrete constitutive model.The stress-strain curves obtained by simulation are in good agreement with the experimental results reported in literature.Stress uniformity in the C100 specimen was analyzed.Result shows that the stresses in the specimen are not uniform in a short period before failure,which brings error to test result.

Keywords: concrete   SHPB test   numerical simulation   stress   uniformity  
收稿日期 2007-07-04 修回日期  网络版发布日期  
DOI:
基金项目:

通讯作者:
作者简介: 曹吉星(1981- ),男,博士研究生,研究方向为计算固体力学,电话:13281484062,E-mail:cjxhqh@163.com

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