[1]陈嘉伟,孔祥韶,倪其军.冲击载荷作用下固支方板临界撕裂判据及极限吸能分析[J].常州大学学报(自然科学版),2019,31(01):21-27.[doi:10.3969/j.issn.2095-0411.2019.01.004]
　CHEN Jiawei,KONG Xiangshao,NI Qijun.Tearing Failures and Ultimate Energy Absorption Analysis of Clamped Square Plates Subjected to Impulsive Loading[J].Journal of Changzhou University(Natural Science Edition),2019,31(01):21-27.[doi:10.3969/j.issn.2095-0411.2019.01.004]
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冲击载荷作用下固支方板临界撕裂判据及极限吸能分析()
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常州大学学报(自然科学版)[ISSN:2095-0411/CN:32-1822/N]

卷:
第31卷
期数:
2019年01期
页码:
21-27
栏目:
材料科学与工程
出版日期:
2019-01-28

文章信息/Info

Title:
Tearing Failures and Ultimate Energy Absorption Analysis of Clamped Square Plates Subjected to Impulsive Loading
文章编号:
2095-0411(2019)01-0021-07
作者:
陈嘉伟1; 2; 孔祥韶1; 倪其军2
(1.武汉理工大学 交通学院,湖北 武汉 430063; 2.中国船舶科学研究中心,江苏 无锡 214082)
Author(s):
CHEN Jiawei1; 2;  KONG Xiangshao1;  NI Qijun2
(1. School of Transportation, Wuhan University of Technology, Wuhan 430063, China; 2. China Ship Scientific Research Center, Wuxi 214082, China)
关键词:
固支板;  极限吸能;  应力三轴度;  冲击载荷;  失效模型
Keywords:
clamped square plates;  ultimate energy absorption;  stress triaxiality;  impulsive loading;  failure model
分类号:
O 389
DOI:
10.3969/j.issn.2095-0411.2019.01.004
摘要:
以固支方板为研究对象,依据Q235钢断裂力学性能试验,拟合了断裂应变与应力三轴度之间的关系。随后对固支板极限耗能及失效判据进行理论分析,在基于大变形膜应力耗能条件下推导了固支板在冲击载荷作用下的塑性极限耗能,得出极限吸能与破坏应变的函数关系。借助仿真手段,对固支板边界撕裂处应力三轴度进行分析,从而确定材料的极限断裂应变,在工程应用方面有较大改进。证实了基于应力三轴度损伤的失效准则能较好预测固支板在冲击载荷作用下的失效毁伤模式。
Abstract:
The clamped square plates are taken as the object of study, the relation between the fracture strain and the stress triaxiality is fitted according to the test of fracture mechanics property of Q235 steel. Then the analysis is made on the tearing failures and ultimate energy absorption of clamped square plates, the plastic ultimate energy dissipation is derived based on large deformation of membrane stress absorption, and the function between ultimate energy absorption and failure strain is established. With the aid of simulation method, the ultimate fracture strain of the material is determined from triaxiality of the boundary tearing elements, which is greatly improved in engineering applications. It is proved that the stress triaxiality failure criteria can predict the failure damage model of clamped square plates subjected to impulsive loading well.

参考文献/References:


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备注/Memo

备注/Memo:
收稿日期:2018-09-20。
基金项目:国家重点研发计划(2016YFC0301000)。
作者简介:陈嘉伟(1990—),男,江苏宜兴人,博士生,工程师。E-mail:chenjiawei44@126.com
更新日期/Last Update: 2019-02-20