軽金属
Online ISSN : 1880-8018
Print ISSN : 0451-5994
ISSN-L : 0451-5994
研究論文
種々の負荷を受ける5052アルミニウム合金板の塑性変形挙動の測定と結晶塑性解析
吉田 健吾渥美 慎也辻 智文
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2021 年 71 巻 5 号 p. 208-213

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Plastic behaviors of A5052-O sheet subjected to the uniaxial and biaxial tensions and the reverse and cross loadings were measured. In the reverse loading, the reyield stress and the flow stress are lower than the monotonic flow stress; the specimen exhibits the Bauschinger effect. In the cross loading, the change in the strain path results in an increase in the flow stress and a decrease in the work hardening rate. Plastic behaviors of the specimen were simulated by using a polycrystal plasticity model. It is found that the latent hardening coefficient and the back stresses of slip systems have no influence on the predicted flow stress and in-plane strain ratio for the uniaxial and biaxial tensions. In the cross loading, the latent hardening coefficient of 1.4 increases the flow stresses, which is higher than the experimental data. Incorporation of the back stress reduces the reyield stress in the reverse loading. It also decreases the reyield stress in the cross loading.

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