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Strain localization phenomena associated with static and dynamic strain ageing in notched specimens: experiments and finite element simulations.

Abstract : The aim of the present work is to use an available constitutive model for the description of the Portevin-Le Chatelier effect to simulate the deformation of notched specimens in tension (smooth and sharp U-notched specimens). This model can be used to account for dynamic strain ageing as suggested by Estrin et al. [Acta Mater. 49 (2000) 1087] but also static strain ageing as suggested by Kubin et al. [Acta Metall. Mater. 40 (1992) 1037]. The experimental material studied is an Al-Cu alloy, displaying dynamic strain ageing at room temperature. Regarding Luders band propagation, the experimental material studied is a mild steel. This work shows that the PLC serrations disappear progressively on the macroscopic curve when the notch radius decreases. However, strain localization still takes place in the deformed notched zone, and can escape from the notched zone. Regarding the Luders behavior, the computed spreading of deformation bands is in agreement with experimental observations.
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https://hal.archives-ouvertes.fr/hal-00018967
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Submitted on : Monday, February 13, 2006 - 4:32:21 PM
Last modification on : Friday, March 4, 2022 - 3:18:01 AM

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  • HAL Id : hal-00018967, version 1

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Stéphanie Graff, Samuel Forest, Jean-Loup Strudel, Claude Prioul, Philippe Pilvin, et al.. Strain localization phenomena associated with static and dynamic strain ageing in notched specimens: experiments and finite element simulations.. Materials Science and Engineering, Elsevier, 2004, 387, pp.181-185. ⟨hal-00018967⟩

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