426 連続体損傷力学に基づく数値材料試験法による疲労寿命予測

概要

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In this paper, low cycle fatigue life of A16061 and fatigue life for 3 point bending are predicted by the elasto-viscoplastic constitutive equation formulated, based on the concept of continuum damage mechanics. Also, the damage evolution equation is extended to consider micro-cracks and micro-voids under repeated loading. The constitutive modeling is identified, based on static/dynamic tensile tests and fatigue tests for aluminum 6061-T6 and steel used for rail. The identified model is applied to predict fatigue limit under completely reversed tension for 6061-T6. Additionally, by the identified model, fatigue limit subjected to three point bending is predicted for rail. The predicted results for 6061-T6 and rail have corresponded well to the experimental results by Morino, Iwafuchi and others.
一般社団法人日本機械学会の論文
2003-11-22