期刊论文

Yu, M.

中文

机械强度

1001-9669

2013

35

3

335-340

10.16579/j.issn.1001.9669.2013.03.009

国家自然科学基金（10872065,50801025）； 中南林业科技大学青年基金（QJ2011040B）资助项目~~；

本校为第一且通讯机构

研究含非对称十字裂纹无限大压电弹性体在无穷远纵向剪切下任意位置作用广义集中载荷的电弹干涉效应。运用弹性复势方法,获得问题的封闭形式解答,导出非对称十字裂纹尖端的Ⅲ型广义强度因子、能量释放率和应变能密度因子表达式,并由此获得T型裂纹的相应新解答。讨论支裂纹对主裂纹尖端广义强度因子、能量释放率和应变能密度因子的影响。算例结果表明,广义集中载荷作用下非对称十字裂纹上、下半平面竖向支裂纹对横向主裂纹的干涉效应明显不同,与广义集中载荷同一半平面的支裂纹促进主裂纹扩展,而另一支裂纹抑制主裂纹扩展,且支裂纹越长,影响越大。其得到的退化结果与已有文献若干结果完全吻合。

The electroelastic interaction problem of infinite plane with a non-symmetrical crisscross crack in piezoelectric composite materials under the interaction between arbitrary generalized line force and remote load was investigated. Using complex variable method, the closed form solution was presented and the solutions of the generalized intensity factors of mode III , energy release rate and energy density factor of the crack tip were calculated. Thereby the appropriate solutions were obtained for the problems of the symmetrical crisscross crack and the problems of the T-shaped crack. The influ...