The autofrettage of alloy D16 disks is investigated experimentally. The results of the experimental modeling are compared with the numerical calculations. A mathematical model of plasticity is developed based on the performed cyclic push-pull tests of flat specimens. Additional functions of the previously accumulated plastic strain are incorporated into a nonlinear kinematic hardening model. The damage parameter is included according to the effective stress concept to describe a decrease in the elastic modulus during elastic-plastic deformation. Experimentally obtained distribution of residual circumferential and radial strains has shown a good agreement with the numerical results.
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Translated from Problemy Prochnosti, No. 2, pp. 45 – 57, March – April, 2018.
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Lvov, G.I., Okorokov, V.O. Experimental Study of Autofrettage. Strength Mater 50, 270–280 (2018). https://doi.org/10.1007/s11223-018-9968-7
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DOI: https://doi.org/10.1007/s11223-018-9968-7