Mechanics & Industry
Volume 21, Number 5, 2020
Scientific challenges and industrial applications in mechanical engineering
|Number of page(s)||9|
|Published online||13 August 2020|
Influence of the material microstructural properties on a 3-point bending test
Mechanics Laboratory, Department of Mechanics, Laghouat University, Algeria
2 Symme Laboratory, Savoie Mont Blanc University (EA4144), France
3 Symme Laboratory, Savoie Mont Blanc University (EA4144), France
4 Mechanics Laboratory, Department of Mechanics, Laghouat University, Algeria
* e-mail: firstname.lastname@example.org
Accepted: 12 June 2020
The purpose of this study is to highlight the role played by some important factors on sprinback phenomenon. This latter affects significantly the geometry of the manufactured product. Large automotive or plane body parts are specifically affected by this phenomenon which complicates the tools design. The study focuses here on specific materials with high trend to develop heterogeneous strains during forming processes. Due to its hexagonal crystalline structure, titanium has initial heterogeneous microstructure that grows stronger when plastic strain occurs. Heterogeneous microstructures induce the coexistence in the material of volumes with different mechanical properties even, in some case, with different mechanical behaviours. Therefore, accommodation between these volumes generates distributed internal stresses and important elastic energy storage. The macroscopic behaviour can be provided either by average phenomenological constitutive equation identical for all locations in the material or by integrating a set of local constitutive relations taking into account the variability of the behaviour as a function of the position in the material. In this context, experimental and numerical studies of a 3-point bending test on titanium alloy are considered.
Key words: Bending test / springback / strain gradient / local behavior / heterogeneity
© A. Maati et al., published by EDP Sciences 2020
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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