ABSTRACT
Based on the existing codes of three-dimensional elastic analysis by displacement discontinuity method with the boundary division into triangular leaf element, an advanced square-root crack edge element code is exploited which can be used to estimate the stress intensity factor K1 for computing the crack extension induced by thermal stress. A special semi-analytical method is successfully adopted to evaluate the influence function f(x,y). Furthermore, in order to keep the high-speed & high-accuracy advantage of our numerical system, the feasibility of seeking pure closed-form evaluation fox f(x,y) is also studied.
