Abstract
A series of high-strain rate tests has been carried out involving high-speed, kinematic and thermal metrology. The concomitant measurement of strain, stress and self-heating allowed the estimation of the inelastic heat fraction and further increase in inelastic stored energy. A thermo-viscoplastic constitutive model has then been developed within the irreversible thermodynamics framework by considering state variables and driving forces different from those usually considered. The experiment-based and physics-motivated approach proposed allows for deriving loading-path dependent self-heating consistently from the constitutive model, without the need for considering any arbitrary inelastic heat fraction.
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Acknowledgment
The author would like to acknowledge the support of Agence de l’Innovation de Défense (AID), DGA, France. The author would also like to acknowledge the contribution of Dr. Clément Mailhé who provided help for the experiments.
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Longère, P. (2024). Consistent Modeling of Thermo-Viscoplasticity for High-Speed Processes. In: Mocellin, K., Bouchard, PO., Bigot, R., Balan, T. (eds) Proceedings of the 14th International Conference on the Technology of Plasticity - Current Trends in the Technology of Plasticity. ICTP 2023. Lecture Notes in Mechanical Engineering. Springer, Cham. https://doi.org/10.1007/978-3-031-42093-1_48
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