A Numerical Solution of a Surface Crack Under Cyclic Hydraulic Pressure Loading

摘要: Material degradation and failure in rolling contact components are often associated with surface crack initiation propagation under repeated loading. In the presence of lubricating fluid, hydraulic pressure fluid film between contacting surfaces may play an important role growth process. This paper presents a method to model effect loading on growth. The governing equations coupled viscous fluid/cracked solid problem obtained, which nonlinear integral differential equations. is assumed be Newtonian incompressible. cracked considered linearly elastic. Pressure history prescribed at mouth. Finite difference methods used solve For each time step, Newton-Raphson iteration search for root Both transient steady-state distributions cyclic obtained using this method. A few numerical examples given demonstrate reliability effectiveness solution shows that there exists characteristic time, determines whether fluctuations mouth can transmitted deep into crack. distribution exhibits phase delay from applied