A CONSERVATIVE INTEGRAL FOR DETERMINING STRESS INTENSITY FACTORS OF ABIMATERIAL STRIP

Both conservative line and area integrals are derived from the Betti r eciprocal principle to determine the stress intensity factor for a bim aterial strip. Numerical results are presented to demonstrate the accu racy of the methods. Several mesh types have been exploited to examine the effect of meshing on the results. Stress intensity factors obtain ed by means of the line integral vary somewhat between paths. Those fo und by means of the area integral have the same value on different pat hs.