摘要
研究了长度单位的选取对界面裂纹与界面下裂纹干涉的影响 .对于一条在远场载荷作用下的界面裂纹及其附近的界面下裂纹 ,采用伪力法计算了不同长度单位时无量纲化的应力强度因子和能量释放率 .研究结果表明 :对于具有与长度单位有关的振荡性的物理量 ,无量纲化不能保证其与长度单位的选取无关 ;对于不具有任何振荡性的物理量 ,无量纲化可以保证其与任何物理单位的选取无关 .
The effect of length unit on the interaction between an interface crack and subinterface cracks is investigated. For an interface crack and nearby subinterface cracks under far-field applied stress condition, the non-dimensionalized stress intensity factors and energy release rates for different length units are calculated through the pseudo-traction method. Results show that for a physical parameter with oscillation relative to length unit, non-dimensionalization could not ensure its independence of choice of length unit; while for a physical parameter without any oscillation, non-dimensionalization could ensure its independence of any physical dimension.
出处
《西安交通大学学报》
EI
CAS
CSCD
北大核心
2001年第1期91-94,共4页
Journal of Xi'an Jiaotong University
基金
国家自然科学基金资助项目 !(19472 0 5 3)
