带复合型摩擦裂纹的圆盘动态断裂实验有限元分析

李念斌; 董世明; 华文

doi:10.21656/1000-0887.410349

带复合型摩擦裂纹的圆盘动态断裂实验有限元分析

doi: 10.21656/1000-0887.410349

1. 中国核动力研究设计院核反应堆系统设计技术重点实验室，成都 610213;
2. 四川大学建筑与环境学院，成都 610065

基金项目:

国家自然科学基金(11872042)

详细信息

作者简介:
李念斌(1991—)，男，工程师，硕士(E-mail: 943200874@qq.com);董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

通讯作者:
董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

中图分类号: O346.11
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- 文章访问数: 483
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- PDF下载量: 38
- 被引次数: 0
出版历程
- 收稿日期: 2020-11-21
- 修回日期: 2021-04-15

Finite Element Analysis on Mixed-Mode Dynamic Fracture Experiments of Centrally Cracked Brazilian Disks With Crack Face Contact

1. Science and Technology on Reactor System Design Technology Laboratory, Nuclear Power Institute of China, Chengdu 610213, P.R.China;
2. College of Architecture & Environment, Sichuan University, Chengdu 610065, P.R.China

Funds:

The National Natural Science Foundation of China(11872042)

摘要

摘要: 为验证考虑裂纹面接触和动态荷载时，中心裂纹巴西圆盘（CCBD）试件用于分离式Hopkinson压杆（SHPB）系统中测量脆性材料复合型动态断裂韧度的可行性，以及研究裂纹面接触对动态断裂韧度实验结果的影响.通过有限元法建立SHPBCCBD三维有限元模型，计算了不同加载条件下CCBD试件的动态应力强度因子（DSIF）.结果表明：在实验中，将考虑裂纹面接触的应力强度因子(SIF)准静态公式推广为动态公式，需要判定断裂时间是否达到应力平衡的时间条件；压剪复合型加载时，裂纹面接触导致裂纹面应力变化，会对Ⅱ型裂纹的DSIF产生显著影响，不考虑裂纹面接触的影响将会导致Ⅱ型DSIF的测试值偏大.
- 裂纹面接触 /
- 分离式Hopkinson压杆 /
- 中心裂纹巴西圆盘 /
- 有限元法 /
- 动态应力强度因子
Abstract: To verify the feasibility of measuring brittle material’s complex-mode dynamic fracture toughness, the centrally cracked Brazilian disk (CCBD) specimen was tested under dynamic loads in the split Hopkinson pressure bar (SHPB) system in view of crack face contact. The 3D SHPB-CCBD finite element model was established to calculate dynamic stress intensity factors (DSIFs) of the CCBD specimen under different loading conditions. Results show that, the fracture time condition of stress equilibrium is necessary for calculating DSIFs through extension of the quasi-static stress intensity factor (SIF) formula with crack face contact to the dynamic expression. The crack face contact leads to changes of the crack face stress, and has a significant impact on the mode-II DSIFs. The test values of mode-II DSIFs will be unreasonably larger without regard to the crack face contact.
- crack face contact /
- split Hopkinson pressure bar /
- centrally cracked Brazilian disk /
- finite element method /
- dynamic stress intensity factor

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参考文献(13)

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带复合型摩擦裂纹的圆盘动态断裂实验有限元分析

doi: 10.21656/1000-0887.410349

作者简介:
李念斌(1991—)，男，工程师，硕士(E-mail: 943200874@qq.com);董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

通讯作者:
董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

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Finite Element Analysis on Mixed-Mode Dynamic Fracture Experiments of Centrally Cracked Brazilian Disks With Crack Face Contact

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目录

留言板

带复合型摩擦裂纹的圆盘动态断裂实验有限元分析

doi: 10.21656/1000-0887.410349

作者简介: 李念斌(1991—)，男，工程师，硕士(E-mail: 943200874@qq.com);董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

通讯作者: 董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

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出版历程

Finite Element Analysis on Mixed-Mode Dynamic Fracture Experiments of Centrally Cracked Brazilian Disks With Crack Face Contact

计量

出版历程

目录

作者简介:
李念斌(1991—)，男，工程师，硕士(E-mail: 943200874@qq.com);董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).

通讯作者:
董世明（1963—），男，教授，博士生导师(通讯作者. E-mail: smdong@scu.edu.cn).