BEM COMPUTATION OF DSIF IN CRACKED VISCOELASTIC PLATES

Dynamic stress intensity factors of cracked linear viscoelastic solids under conditions of plane stress are computed by the boundary-element method in conjunction with the numerical Laplace transform and the co rrespondence principle of linear viscoelasticity. Quadratic isoparamet ric conventional and quarter-point boundary elements are employed. The multidomain approach is used in cases where symmetry cannot be invoke d. Dynamic stress intensity factors are computed for cracked viscoelas tic rectangular plates subjected to suddenly applied loads, and compar isons are made against results obtained by other numerical methods.