Steady-state propagation of a mode II crack in couple stress elasticity

摘要: The present work deals with the problem of a semi-infinite crack steadily propagating in an elastic body subject to plane-strain shear loading. It is assumed that mechanical response governed by theory couple-stress elasticity including also micro-rotational inertial effects. This introduces characteristic material lengths order describe pertinent scale effects emerge from underlying microstructure and has proved be very effective for modeling complex microstructured materials. propagates at constant sub-Rayleigh speed. An exact full field solution then obtained based on integral transforms Wiener–Hopf technique. Numerical results are presented illustrating dependence stress intensity factor energy release rate upon propagation velocity elasticity. analysis confirms extends previous within context concerning stationary cracks micro-inertial