DEFORMATION RESISTANCE MEASURING METHOD OF ELASTIC-PLASTIC MATERIAL

• Main Authors: NARUMIYA HIROKI, NISHIMURA RYUICHI, FUJITA TAKASHI
• Format: Patent
• Language: English; Japanese
• Published: 10.10.2019
• Subjects: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; PHYSICS; TESTING

To measure a deformation resistance of an elastic-plastic material with higher accuracy.SOLUTION: The deformation resistance measuring method of the elastic-plastic material includes: a step for calculating a relational expression of a coefficient group of an approximated curve of a plastic load curve and a coefficient group of a hardening rule of an elastic-plastic material by extracting a plastic load curve from a load curve and an unload curve contained in the load-displacement curve at the time of a hardness test of an elastic-plastic material; and a step for determining the coefficient group of the hardening rule of a measuring object elastic-plastic material based on the coefficient group and the relational expression of the approximated curve of the plastic load curve by extracting a plastic load curve from the load curve and unload curve contained in the load-displacement curve at the time of the hardness test of the measuring object elastic-plastic material.SELECTED DRAWING: Figure 1 【課題】弾塑性材料の変形抵抗をより高い精度で測定する。【解決手段】弾塑性材料の硬さ試験時の荷重−変位曲線に含まれる載荷曲線および除荷曲線から塑性載荷曲線を抽出し、塑性載荷曲線の近似曲線の係数組と弾塑性材料の硬化則の係数組との関係式を算出するステップと、測定対象弾塑性材料の硬さ試験時の荷重−変位曲線に含まれる載荷曲線および除荷曲線から塑性載荷曲線を抽出し、塑性載荷曲線の近似曲線の係数組と関係式とに基づいて測定対象弾塑性材料の硬化則の係数組を決定するステップとを含む、弾塑性材料の変形抵抗測定方法が提供される。【選択図】図１