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首页> 外文会议>Conference of the European Scientific Association on Material Forming >Locking and stability of 3D woven composite reinforcements N^S. MathieuUniversite de Lyon, CNRS, INSA-Lyon, LaMCoS UMR5259, F-69621, FranceMsylvain.mathieu@insa-lyon.fr
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Locking and stability of 3D woven composite reinforcements N^S. MathieuUniversite de Lyon, CNRS, INSA-Lyon, LaMCoS UMR5259, F-69621, FranceMsylvain.mathieu@insa-lyon.fr

机译：3D编织复合增强件的锁定和稳定性N ^ S. Mathieu 里昂大学，CNRS，Insa-Lyon，Lampos UMR5259，F-69621，F-69621，法国 Sylvain.Mathieu@Insa-lyon.fr

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摘要

3D woven composite reinforcements preforming simulations are an unavoidable step of composite part processing. The present paper deals with thick composite fabric behavior modelling and issues arising during the numerical simulation of preforming. After the description of the independent deformation modes of initially orthotropic reinforcements, a physically motivated and invariant based hyperelastic strain energy density is introduced. This constitutive law is used to show the limitations of a classical finite element formulation in 3D fabric simulations. Tension locking is highlighted in bias extension tests and a reduced integration hexahedral finite element with specific physical hourglass stabilization is proposed. Instabilities due to the highly anisotropic behavior law, witnessed in bending dominated situations, are exposed and a stabilization procedure is initiated.
机译：3D编织复合增强型预成型模拟是复合部件处理的不可避免的步骤。本文涉及厚复合织物行为建模和在预成型数值模拟期间出现的问题。在初始正交增强的独立变形模式的描述之后，引入了物理动机和不变基基的超弹性应变能密度。该本构规法用于展示3D织物模拟中经典有限元制剂的局限性。张力锁定在偏移试验中突出显示，提出了具有特定物理沙漏稳定的减少的整合六面体有限元。由于弯曲主导地区的高度各向异性行为法而导致的稳定性，暴露，并启动了稳定程序。

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