When edge cracked plates are subjected to transient temperature distributions which are asymmetrical about the plane of the crack, a singular stress field is produced which leads to a Mode II type of fracture. Because of the crack, the heat flux is also singular, and its strength must be calculated by special techniques. In this paper we present the derivation of a pair of special finite-element programs used to calculate the strengths of the thermal singularity and of the Mode II stress intensity factor. Calculations are presented for three different thermal boundary conditions to illustrate their effects. A comparison of these results with those of symmetrical temperature fields which produce Mode I stress fields indicates that the stress intensity factors of the latter case are an order of magnitude larger than those of the former.
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