三点曲げによる変態塑性係数の同定

概要

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In order to obtain the transformation plasticity coefficient, three-point bending system is employed and the large deflection due to transformation plasticity in bending is analyzed under the simplified assumption that transformations occur uniformly across the cross section of the beam. It is shown that the deflection due to transformation plasticity is similar to that of elastic deformation and a simple relation is also derived between the ratio of the maximum deflection to the elastic one and material constants (transformation plasticity coefficient K and Young's modulus E). Experiments are carried out for a slender bar specimen, which is loaded in the three point bending system, and the austenized specimen is cooled down so that martensite transformation accompanied by transformation plasticity occurs and the profile and the maximum value of the deflection of the specimen are measured. The measured profiles of deflection agree very well with the thoretical result and it proves the validity of the proposed method. The transformation plasticity coefficient is also identified by the proposed method.
一般社団法人日本機械学会の論文
2003-08-25