Abstract
Certain analytical and experimental aspects of the fracture of cracked thin plates subjected to pure twisting moments are examined. A simplified analytical and finite element approach to evaluate plate tearing mode stress intensity factors is proposed. A photoelastic study was also performed to observe the crack-tip fringe patterns and evaluate the plate tearing mode stress intensity factors. Although the observed fringe patterns differed considerably from the predictions obtained using Williams' analysis, they were much closer to the predictions obtained using Reissner's bending theory and the approach proposed in this paper. The finite-element study using the proposed method as well as the Kirchoff bending theory showed that the stress intensity factors obtained using the proposed method agree more closely with the photoelastic results.
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