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Communication Dans Un Congrès Année : 2013

Modeling frictional contact interactions in fiber assemblies

Résumé

Fibrous materials are used under many circumstances to endow manufactured goods with special mechanical properties, in particular a high tensile resistance combined with a low bending stiffness. Most often, fibers are arranged through one or more assembly processes, such as twisting, braiding or weaving, before being used as reinforcement associated with a matrix to form a composite material. The mechanical behavior of structures made of fibers is often complex, due to the nonlinearities related to contact-friction interactions between fibers, and to the couplings between loadings in different directions induced by these interactions. The need for characterization of mechanical properties for these objects often involves at least two scales : at the macro scale, the global nonlinear constitutive behaviour is to be determined, while at the local scale, the wide distribution of stresses among fibers must be evaluated, particularly concerning damage prediction. A common feature of textile and fibrous structures is that the initial arrangement of their constituting fibers is generally a priori unknown, as it results from the assembly process. Determining this initial arrangement is a first requirement before considering the mechanical characterization of such structures. To perform a mechanical characterization of fibrous materials and structures, an approach using the finite element method and an implicit solver, and specially focusing on the detection and modelling of contact-friction interactions between fibers. The main difficulties of this approach lie in the high number of contacts that are to be considered and in the robust algorithms required to solve the problem. After a presentation of the method developed to detect contacts within assemblies of fibers, and an introduction to the models and algorithms used to account for contact-friction interactions within these structures, the approach will be illustrated by different application cases.
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Dates et versions

hal-00845211 , version 1 (16-07-2013)

Identifiants

  • HAL Id : hal-00845211 , version 1

Citer

Damien Durville. Modeling frictional contact interactions in fiber assemblies. 3rd International Conference on Computational Contact Mechanics (ICCCM 2013), Jul 2013, Lecce, Italy. ⟨hal-00845211⟩
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