| 引用本文: | 李营,杜志鹏,吴卫国,朱海清,张磊,张玮.应力三轴度和Lode角的舰用钢动态失效准则[J].哈尔滨工业大学学报,2017,49(10):153.DOI:10.11918/j.issn.0367-6234.201605019 |
| LI Ying,DU Zhipeng,WU Weiguo,ZHU Haiqing,ZHANG Lei,ZHANG Wei.Dynamic failure criterion of ship-build metal based on stress trixiality and Lode parameter[J].Journal of Harbin Institute of Technology,2017,49(10):153.DOI:10.11918/j.issn.0367-6234.201605019 |
|
| 摘要: |
| 准确获得舰用钢的失效特性是开展爆炸冲击等载荷作用下舰船毁伤评估的重要前提，应力三轴度和Lode参数是衡量材料应力状态的重要参量.为综合考虑应力状态、应变率和温度对舰用钢失效特性的影响，将考虑应力状态的MMC准则与考虑应变率、温度效应的J-C断裂准则相结合，提出了基于应力三轴度和Lode角的典型舰用金属动态失效准则，基于ABAQUS平台开发了VUMAT材料子程序，给出了动态失效准则的一般流程和实现方法.最后，通过开展一级轻气炮发射弹体侵彻2 mm厚舰用低碳钢穿甲试验，获得弹体侵彻钢板前后的速度变化，结合弹体侵彻钢板后剩余速度的比较对失效准则的有效性进行了验证.结果表明，考虑应力三轴度和Lode角的动态损伤失效准则能有效预测舰用金属材料的动态损伤失效，新模型较常用的J-C断裂准则在预测弹体剩余速度方面具有更高准确性.新准则可用于预测爆炸、冲击和侵彻等载荷作用下舰船结构爆炸破口尺寸、破坏模式、弹体剩余速度等.
|
| 关键词: 应力三轴度 Lode参数 应力状态 动态失效 抗弹性能 |
| DOI：10.11918/j.issn.0367-6234.201605019 |
| 分类号:U668.1 |
| 文献标识码:A |
| 基金项目:国家自然科学基金(51509196)；中央高校基本科研业务费专项资金(2014-yb-20)；非线性力学国家重点实验室开放基金(LNM201505) |
|
| Dynamic failure criterion of ship-build metal based on stress trixiality and Lode parameter |
|
LI Ying1,2,DU Zhipeng2,WU Weiguo1,ZHU Haiqing1,ZHANG Lei2,ZHANG Wei2
|
|
(1.School of Transportation,Wuhan University of Technology, Wuhan 430063, China; 2.Naval Academy, Beijing 100161, China)
|
| Abstract: |
| It is very important to assess failure mode of warship under explosion and shock loading. Stress triaxiality and Lode angle are all important factors to judge stress states of material. By combining the stress states of MMC failure criterion and strain, temperature of J-C failure criterion and taking stress states, strain and temperature into account, a dynamic failure criterion for ship-build metal was set up. A VUMAT material subroutine was introduced into ABAQUS and the ballistic perforation resistance of 2 mm ship-build mild steel was studied by simulation and experiments. The results showed that the new dynamic failure criterion based on stress triaxiality and Lode angle could predict the failure of ship-build metal under dynamic loading, which was more accurate than J-C criterion. The new criterion could be used to predict dimension of crevasse, failure mode and residual velocity under explosion, shock and penetration loading.
|
| Key words: stress triaxiality Lode angle stress states dynamic failure ballistic resistance |
