Authors: Philippe Boisse Yamina Aimène Abdelwaheb Dogui Samia Dridi Sébastien Gatouillat Nahiene Hamila Muhammad Aurangzeb Khan Tarek Mabrouki Fabrice Morestin Emmanuelle VidalSallé
Publish Date: 2009/12/04
Volume: 3, Issue: 2, Pages: 1229-1240
Abstract
The clear multiscale structure of composite textile reinforcements leads to develop continuous and discrete approaches for their forming simulations In this paper two continuous modelling respectively based on a hypoelastic and hyperelastic constitutive model are presented A discrete approach is also considered in which each yarn is modelled by shell finite elements and where the contact with friction and possible sliding between the yarns are taken into account Finally the semidiscrete approach is presented in which the shell finite element interpolation involves continuity of the displacement field but where the internal virtual work is obtained as the sum of tension inplane shear and bending ones of all the woven unit cells within the element The advantages and drawbacks of the different approaches are discussedγ is the shear angle γ = θ1–θ2 Fig 3 It is shown that a shear angle increment dγ gives stresses proportional to Gdγ in the stress computation scheme presented “Continuous approach 1 a hypoelastic model” Eq 3 to 11 That is important because the inplane shear behaviour of a textile material is function of the shear angle G is not a constant and depends on γ
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