赤外線法による応力集中係数および応力拡大係数範囲の決定

概要

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The stress concentration factors for basic notch shapes in sheet specimens made of three kinds of materials with different thermoelastic constants and for cross shaped specimens which made imitation weld toe shape, and stress intensity factor ranges for CT and CCT specimens made of a mild steel plate were evaluated using a thermoelastic stress analyzer. The results were compared with finite element method or theoretical results. The stress concentration factors measured by the thermoelastic stress analyzer were slightly lower than those of the finite element method or theoretical results regardless of specimen configurations, and the error tended to increase with increasing stress concentration. The mode I stress intensity factor ranges determined by thermoelastic effect agreed with other comparable independent values in the range of error within 9% regardless of specimen type and stress ratio.
1998-11-25