Loading...
Please wait, while we are loading the content...
Similar Documents
Modélisation multi-échelles en viscoplasticité endommageable de composites thermoplastiques renforcés par des fibres discontinues
| Content Provider | Semantic Scholar |
|---|---|
| Author | Achour, Nadia Arifa Chatzigeorgiou, George Bonnay, Kevin Meraghni, F. |
| Copyright Year | 2017 |
| Abstract | A new multi-scale model accounting for viscoplasticity and damage is developed for a short-fiber reinforced polypropylene composite. In the proposed Mori Tanaka homogenization approach, the viscoplastic matrix is modeled through a phenomenological constitutive law named by its authors DSGZ and the glass fibers are considered as linear elastic. The multiscale model accounts for the composite’s microstructure, which is previously characterized by X-ray microtomography. The introduction of the viscoplastic matrix into the Mori Tanaka method is achieved thanks to an implicit integration scheme that enables the estimation of the necessary tangent modulus. The material damage mechanism is considered at the matrix/fiber interface and is modeled by a Weibull-type cumulative law. The rate dependence of the composite observed in the dynamic tests is integrated through the viscous behavior of the matrix. The model parameters are identified by an inverse method using tensile tests at different strain rates and for different orientations of samples. The model is subsequently validated by comparison with high speed tensile tests. Mots Clés : prière de donner ici entre 3 et 5 mots clés |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://hal.archives-ouvertes.fr/hal-01577021/document |
| Alternate Webpage(s) | https://sam.ensam.eu/bitstream/handle/10985/11998/LEM3_JNC_2017_MERAGHNI2.pdf?isAllowed=y&sequence=3 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
