Analysis of semi-solid response under rapid compression tests using multi-scale modelling and experiments
Article dans une revue avec comité de lecture
Date
2010Journal
Transactions of Nonferrous Metals Society of ChinaAbstract
Simulating semi-solid metal forming requires modelling semi-solid behaviour. However, such modelling is difficult because semi-solid behavior is thixotropic and depends on the liquid-solid spatial distribution within the material. In order to better understand and model relationships between microstructure and behavior, a model based on micromechanical approaches and homogenisation techniques is presented. This model is an extension of a previous model established in a pure viscoplastic framework to account for elasticity. Indeed, experimental load-displacement signals reveal the presence of an elastic-type response in the earlier stages of deformation when semi-solids are loaded under rapid compression. This elastic feature of the behaviour is attributed to the response of the porous solid skeleton saturated by incompressible liquid. A good quantitative agreement is found between the elastic-viscoplastic predicted response and the experimental data. More precisely, the strong initial rising part of the load-displacement curve, the peak load and the subsequent fall in load are well captured. The effect of solid fraction on mechanical response is in qualitative agreement with experiments.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureBROT, Grégoire; KOUTIRI, Imade; BONNAND, Vincent; FAVIER, VERONIQUE; DUPUY, Corinne; RANC, Nicolas; AIMEDIEU, Patrick; LEFEBVRE, Fabien; HAUTEVILLE, Robin (2023)This work aims to analyze the sensitivity of the very high-cycle fatigue behavior of LPBF-Ti-6Al-4V to microstructure and porosity variations. To do so ultrasonic fatigue testing is performed on five grades of LPBF-Ti-6Al-4V. ...
-
Chapitre d'ouvrage scientifiqueNumerical simulation of semisolid processing can be carried out using one- or two-phase modeling. Various models based from either fluid or solid mechanics formalisms were developed. The most sophisticated one-phase models ...
-
Direct measurement of local constitutive relations, at the micrometre scale, in bulk metallic alloys Article dans une revue avec comité de lecturePLANCHER, E; MAURICE, C; FAVIER, VERONIQUE; LOISNARD, D; RUPIN, N; MARIJON, Jean-Baptiste; MICHA, Jean-Sébastien; ROBACH, Odile; CASTELNAU, Olivier; BOSSO, E; STODOLNA, J; PETIT, J (International Union of Crystallography, 2017)Multiscale models involving crystal plasticity are essential to predict the elastoplastic behavior of structural materials with respect to their microstructure. However, those models are often limited by a poor knowledge ...
-
Article dans une revue avec comité de lectureCHEBIL, Gwenaëlle; LAPOUGE, Pierre; RENOLLET, Yves; DAVOINE, Cécile; THOMAS, Marc; FAVIER, VERONIQUE; SCHNEIDER, Matthieu (Laser Institute of America, 2021-11)During L-PBF process on aluminum alloys, instabilities such as spatter ejections result from the laser-matter interaction. These spatters create a variety of defects and affect the mechanical properties of the final parts. ...
-
Communication avec acteFAVIER, VERONIQUE; JACQUEMAIN, Vincent; DE LA SELLE, Théotime; QIN, Mingying; RANC, Nicolas (JSMS Committee on Fatigue Materials, The Society of Materials Science, Japan, 2021-07)Ultrasonic machine, which operates at around 20 kHz, is used to quickly get the fatigue behavior in the very high cycle fatigue domain. Cyclic loading at such high frequencies is accompanied by selfheating of the test ...