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応力拡大係数
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Wikipedia definition
1. Stress intensity factor​The stress intensity factor,, is used in fracture mechanics to predict the stress state ("stress intensity") near the tip of a crack caused by a remote load or residual stresses. It is a theoretical construct usually applied to a homogeneous, linear elastic material and is useful for providing a failure criterion for brittle materials. The concept can also be applied to materials that exhibit small-scale yielding at a crack tip.
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