水利水电科技进展2012，Vol.32Issue(6)：31-33,3.DOI:10.3880/j.issn.1006-7647.2012.06.008
Ⅰ-Ⅱ复合型裂缝应力强度因子和应变能释放率的关系
Relationship between stress intensity factor and strain energy release rate of Ⅰ-Ⅱ mixed mode cracks
摘要
Abstract
In order to study the relationship between stress intensity factor and strain energy release rate of mixed mode cracks, the growth of I-II mixed mode cracks is theoretically analyzed by means of the energy method based on the maximum stress criterion. A formula for the relationship between the stress intensity factor and the strain energy release rate of the I-II mixed mode cracks is deduced according to the available relationship between the stress intensity factor and the strain energy release rate of single mode crack. A FEM model for the I-II mixed mode cracks is established by use of the software ABAQUS. It is employed to calculate the stress intensity factor and strain energy release rate of the I-II mixed mode cracks. The model results are compared with those calculated by the deduced formula. The error is only 2. 5% , and the rationality of the proposed formula is validated.关键词
Ⅰ-Ⅱ复合型裂缝/最大应力准则/应力强度因子/应变能释放率Key words
I-II mixed mode crack/maximum stress criterion/stress intensity factor/strain energy release rate分类
建筑与水利引用本文复制引用
刘梦和,王向东,邵兵..Ⅰ-Ⅱ复合型裂缝应力强度因子和应变能释放率的关系[J].水利水电科技进展,2012,32(6):31-33,3.基金项目
国家自然科学基金(50878077) （50878077）
"十一五"国家科技支撑计划(2008BAB29B03) （2008BAB29B03）
