727 連続体損傷力学モデルによる予損傷金属の数値材料試験

概要

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The elasto-viscoplastic constitutive equation is formulated which is based on the concept of continuum damage mechanics. It employs the viscoplastic strain given by Perzyna and extended by Murakami to consider the effect of damage. The unified form of damage evolution equation given by Lemaitre is extended to consider the effect of strain rate and the difference from elastic and plastic deformation. For SM490A, SN490B, Al2219-T87,Al6061-T6,the constitutive modeling is identified, based on static/dynamic tensile tests and fatigue tests. The dynamic tensile behaviors of pre-strained steels and the static/dynamic tensile behaviors of pre-fatigued aluminums are predicted with the use of the identified model. The predicted results have corresponded to the experimental results sufficiently.
一般社団法人日本機械学会の論文
2003-03-13