【摘要】 以断裂力学理论为基础,将水泥混凝土路面视为Winkler地基上的弹性板,利用傅立叶积分变换,并引入位错密度函数,建立了奇异积分方程,推导出水泥混凝土路面表面存在裂纹时裂纹尖端应力强度因子的解析表达式,然后应用Lobatto-Chebyshev数值方法求解奇异积分方程,得到了应力强度因子的数值解.以实际路面为例,计算了裂纹尖端的应力强度因子,讨论了影响应力强度因子大小的因素.更多还原

【Abstract】 The main object of this study is to determine the stress intensity factors in a cement concrete pavement containing a crack in interface based on fracture mechanics theory.In order to simplify the problem,a cement concrete pavement is reduced to an elastic plate on the Winkler foundation.To derive the singular integral equations,Fourier transform and the dislocation density function are used.As a numerical method,Lobatto-Chebyshev integration formula are used to solve the singular integral equations.The numerical solutions of stress intensity factor at the crack tips are given.A cement concrete pavement with an embedded crack is considered.更多还原