Free surface effect on moving crack under impact loading by BEM
The paper deals with the implementation of a three-dimensional time-domain boundary integral formulation for a moving center crack in a finite solid under suddenly applied crack face pressure. The variation of dynamic stress intensity factor (DSIF) along the crack front is studied for a finite solid under step loading. The state of stress is evaluated at the crack vertex, where crack front meets the free surface. The author investigates the effect of free surface on DSIF, and estimates the critical intersection angle of the crack front with the free surface at which square-root singularity is restored at the crack vertex under step loading for various speeds of crack propagation.
three-dimensional time-domain boundary integral formulation
scientific article; zbMATH DE number 1797365
scientific article