PSI - Issue 18

Available online at www.sciencedirect.com Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000 Available online at www.sciencedirect.com ScienceDirect Structural Integrity Procedia 00 (2019) 000 – 000

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ScienceDirect

Procedia Structural Integrity 18 (2019) 711–718

25th International Conference on Fracture and Structural Integrity A Study of Energy Balance in Deformed Metals for Assessment of Damage Accumulation Stage 25th International Conference on Fracture and Structural Integrity A Study of Energy Balance in Deformed Metals for Assessment of Damage Accumulation Stage

Plekhov O.*, Kostina A.,Vshivkov A., Iziumova A. ICMMUrB RAS, Academika Koroleva st, 1, Perm 614013, Russian Federation Plekhov O.*, Kostina A.,Vshivkov A., Iziumova A. ICMMUrB RAS, Academika Koroleva st, 1, Perm 614013, Russian Federation

Abstract The work is devoted to study of energy balance in metals under plastic deformation and failure. Based on our previous experimental results we develop a phenomenological thermodynamic model of heat dissipation in metals. It allows us to simulate the energy balance under plastic deformation, to study the failure process of metals based on the stored energy criterion and the process of fatigue crack propagation. New internal thermodynamic variable is introduced as defect induced deformation and calculated based on the solution of statistical problem of mesodefect evolution. The developed model is adapted for using in standard final-elements numerical code (Abaqus) to simulate energy dissipation under quasi-static and cyclic loading in 3D geometries. The theoretical results were illustrated by computing of energy dissipation both under tensile test of Armco iron specimens and crack propagation under cyclic loading. Abstract The work is devoted to study of energy balance in metals under plastic deformation and failure. Based on our previous experimental results we velop a pheno en logical thermodynamic model of h at dissipati in metals. It allows us t simulate the energy balance under plastic deformation, to study the failure process of metals based on the stored energy criterion and the process of fatigue crack pr pagation. New internal thermodynamic variable is introduced as defect induced deformation and calculated based on the soluti n of statistical problem of mesodefect evolution. The developed model is adapted for usin in standard final-elements numerical code (Abaqus) t simulate energy dissipation under quasi-static and cyclic loading in 3D g ometries. The theoretical results were illustrated by computing of energy dissipation both under tensile test of Armco iron specimens and crack propagation under cyclic loading.

© 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 201 9 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. © 201 9 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. Keywords: Energy dissipation; Thermodynamics of damage accumulation; Metals failure Keywords: Energy dissipation; Thermodynamics of damage accumulation; Metals failure

1. Introduction The theoretical study of the energy balance during deformation of materials has a long history. Lambert et al. (1779) originally mentioned the importance of this problem in the work devoted to the energy similarity of mechanical and thermal failure processes. In Soviet Union a substantial contribution to this matter was made in framework of a structure-energy theory of metal fracture proposed by Ivanova et al. (1975). Many published theoretical and 1. Introduction The theoretical study of the energy balance during deformation of materials has a long history. Lambert et al. (1779) originally mentioned the importance of this problem in the work devoted to the energy similarity of mechanical and thermal failure processes. In Soviet Union a substantial contribution to this matter was made in framework of a structure-energy theory of metal fracture proposed by Ivanova et al. (1975). Many published theoretical and

* Corresponding author. Tel.: +7-342-237-83-21. E-mail address: poa@icmm.ru * Correspon ing author. Tel.: +7-342-237-83-21. E-mail address: poa@icmm.ru

2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 2452-3216 © 2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo.

2452-3216  2019 The Authors. Published by Elsevier B.V. Peer-review under responsibility of the Gruppo Italiano Frattura (IGF) ExCo. 10.1016/j.prostr.2019.08.219