High velocity impact; composites; meso-scale damage model
Abstract :
[en] High velocity impact response of carbon fiber reinforced polymer unidirectional composite laminates with a quasi-isotropic stacking sequence impacted by a rigid spherical projectile is studied using finite element models. The intra-laminar meso-model originally proposed by Ladevèze (LMT-Cachan) for the ply behavior based on continuum damage mechanics, is extended in this paper to take into account ply fracture energies and in-situ strengths. Constitutive modeling relies on mesh size regularization (via a Bazant-type crack-band/smeared-crack formulation), on orthotropic material aligned mesh and on element erosion. Three different types of post-peak degradation strategies are considered and compared in the paper: (a) a damage rate bound model, and smeared-crack formulations based on (b) linear and (c) exponential softening laws. Models (b) and (c) are original contributions. Intra-laminar and inter-laminar damage models are implemented via user routines in LS-Dyna, for explicit dynamic analyses. The efficiency of the novel material models to predict high velocity impact response and to mitigate the mesh size effects is studied. Predictions from the developed models are validated by comparing with test data and numerical results from the literature, and demonstrate that the two new models based on smeared-crack formulations provide accurate results.
Disciplines :
Aerospace & aeronautics engineering
Author, co-author :
Rajaneesh, Anantharaju; GDTech Engineering
Ponthot, Jean-Philippe ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > LTAS-Mécanique numérique non linéaire
Bruyneel, Michaël ; Université de Liège - ULiège > Département d'aérospatiale et mécanique > Modél. num. du comport. des struct. en matériaux composites
Language :
English
Title :
High velocity impact response of composite laminates using modified meso-scale damage
Publication date :
2021
Journal title :
International Journal of Impact Engineering
ISSN :
0734-743X
Publisher :
Elsevier, United Kingdom
Volume :
147
Pages :
103701
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
Beware - 1510644
Funders :
DGTRE - Région wallonne. Direction générale des Technologies, de la Recherche et de l'Énergie [BE]
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