圧延ワークロールの表層亀裂における応力拡大係数の数値解析

概要

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A simplified model for stress intensity factors of mixed modes was derived in consideration of non-dimensional stress intensity factors obtained by Murakami et al. A numerical analysis model for stress intensity factors of mixed modes in the subsurface layer of work roll of rolling was also obtained by applying this simplified model to the deformation analysis model for the thermal elastic-plastic stress and strain in the subsurface layer of work roll with stress and thermal loads. Then, the stress intensity factors in the subsurface layer of work roll in hot rolling were calculated with this numerical analysis model. It has been found that the stress intensity factors of tensile and shear modes on the side of intermediate roll is larger than those on the side of rolling material and that the crack propagation is estimated to occur on the side of intermediate roll, etc.
社団法人日本鉄鋼協会の論文
1997-07-01