An efficient assumed stress hybrid finite element method, based on a complementary energy principle and a Lagrange-multiplier technique, is presented for fracture analysis of cracks and holes in angle-ply laminates. A fully three-dimensional stress state in the laminate is accounted for. Asymptotic analytical solutions in the vicinity of cracks and holes are embedded in special crack and hole elements; interlayer traction reciprocity condition is satisfied a priori; and cross-sectional warping of the laminate is allowed. The method leads to direct computation of mixed mode stress-intensity factors near the crack-front or of stress-concentration factors near fastener holes in composites.
|Number of pages||11|
|State||Published - Jan 1 1980|
|Event||Numer Methods in Fract Mech, Proc of the Int Conf, 2nd - Swansea, Wales|
Duration: Jul 7 1980 → Jul 11 1980
|Conference||Numer Methods in Fract Mech, Proc of the Int Conf, 2nd|
|Period||07/7/80 → 07/11/80|