Theoretical analysis, infrared and structural investigations of energy dissipation in metals under cyclic loading

O.A. Plekhov (1) , N. Saintier (2) , T. Palin-Luc (2) , S.V. Uvarov (1) , O.B. Naimark (1)

1 ICMM - Institute of Continuous Media Mechanics of the RAS
2 I2M - Institut de Mécanique et d'Ingénierie de Bordeaux

The infrared and structural investigations of energy dissipation processes in metals subjected to cyclic loading have given impetus to the development of a new thermodynamic model with the capability of describing the energy balance under plastic deformation. The model is based on the statistical description of the mesodefect ensemble evolution and its influence on the dissipation ability of the material. Constitutive equations have been formulated for plastic and structural strains, which allow us to describe the stored and dissipated parts of energy under plastic flow. Numerical results indicate that theoretical predictions are in good agreement with the experimentally observed temperature data.

Mots clés: Infrared thermography; Energy storage; Low-cyclic fatigue; Thermodynamics of cyclic loading

Domaines: Science des matériaux [cond-mat.mtrl-sci]; Matériaux; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]

O.A. Plekhov, N. Saintier, T. Palin-Luc, S.V. Uvarov, O.B. Naimark. Theoretical analysis, infrared and structural investigations of energy dissipation in metals under cyclic loading. Materials Science and Engineering: A, 2007, 462 (1-2), pp.367-369. ⟨10.1016/j.msea.2006.02.462⟩. ⟨hal-01368353⟩