SOUNDNESS EVALUATION METHOD AND PROGRAM OF STRUCTURAL MATERIAL

摘要

PROBLEM TO BE SOLVED: To provide a soundness evaluation method capable of more precisely calculating the amount of plastic deformation, when quickly and non-destructively evaluating the soundness of a structural material by measuring the hardness of the structural material and calculating the amount of plastic deformation.

SOLUTION: A soundness evaluation method for evaluating the soundness of a structural material by calculating the plastic deformation amount of the structural material includes: a first step for measuring a hardness value HVobs(n)of the structural material, or an evaluation target; a second step for determining a variation ΔHVagingin the hardness due to thermal aging in which the structural material is subjected to until a measuring time; a third step for subtracting the variation ΔHVagingfrom the hardness value HVobs(n)to calculate a hardness value HVcal(n)where the effect of the thermal aging is removed; and a fourth step for applying the hardness value HVcalto first information indicating the relation between the previously determined plastic deformation amount and the hardness of the structural material subjected to no thermal aging to calculate the plastic deformation amount ε of the structural material.

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