【摘要】 研究双材料压电体动态断裂的 Griffith问题 .用余弦积分变换将边值问题化为对偶积分方程 ,得到了封闭形式解 ,计算了裂纹尖端强度因子 .结果表明 ,稳态运动时 ,裂纹尖端处力学、电学强度因子不只决定于材质参数 ,也与裂尖运动速率有关 .更多还原

【Abstract】 A steadily moving Griffith crack in a piezoelectric bimaterial is investigated.After the boundary problem being reduced into dual integral equations by employing Cosine Integral Transformation,the solution of closed form is obtained and the intensity factors of both mechanics and electric are formulated.It is shown that the intensity factors are relevant to materials′parameters of mechanics,electric parameters and the velocity of the moving crack.更多还原