研究无限长条板中粘弹性-弹性界面Griffith裂纹在Ⅰ型突加载荷作用下,裂纹尖端动态应力强度因子的时间响应.利用积分变换方法、Fourier和Laplace变换,分别推导出了弹性和粘弹性问题的控制方程组;引入位错密度函数,并结合边界条件,导出了反映裂纹尖端奇异性的Cauchy型奇异积分方程组,运用Chebyshev正交多项式化奇异积分方程组为代数方程组,用配点法进行求解;最后用Laplace积分变换数值反演方法,将拉氏域内的解反演到时间域内,求得动态应力强度因子的时间响应,并对材料参数的影响进行了分析.结果表明,剪切松弛参量对Ⅰ型动应力强度因子的影响小于对Ⅱ型的影响,而膨胀松弛参量对Ⅰ型动应力强度因子的影响大于对Ⅱ型的影响.
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