724 熱・弾塑性損傷・脆化の連成を考慮した溶融亜鉛めっき中の構造部材の有限要素解析

概要

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It is reported as a problem that cracking takes place on the structural members during hot-dip galvanization. Such cracking takes place because a serious themal stress occurs at the stress-concentrated regions and moreover liquid metal embrittlement occurs in these regions. In the present study, the concept of continuum damage mechanics is introduced, and stiffness reduction due to cracks is expressed by applying a scalar damage variable. Therefore, themal conductivity considering the effect of damage with a damage variable is used to calculate temperature distribution in the structures containing damages. The effect of molten zinc embrittlement is considered by using zinc density on the intergranular surface. We have developed the coupling analysis method by using this analysis method for the damage evaluation in steel structual members under hot-dip galvanization. In this calculation, the shape model, in which cracks frequently occur, is assumed. The validity of the present analysis method is confirmed through these results.
一般社団法人日本機械学会の論文
2003-03-13