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Numerical modeling of nonlinearity, plasticity and damage in CFRP-woven composites for crash simulations

机译：CFRP编织复合材料非线性，塑性和损伤数值模拟，用于碰撞模拟

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摘要

Car manufacturers have to develop lightweight structures to limit the weight-increase induced by the new advanced powertrain systems for hybrid and electrical vehicles. Due to their draping, stiffness, improved ductility and damage tolerance properties woven composites are being increasingly used for the design of crash-relevant structural parts. Before an introduction of the strategies and the conditions set by industrial applications, the main current modeling techniques available for composites in the LS-DYNA finite element code featuring with explicit time integration will be discussed. A user defined composite material model (UMAT) characterized by a linear as well as non-linear behavior coupled with a plasticity definition will be then proposed. A maximal stress criterion is used to detect the failure on the ply. Four post-failure damage definitions have been investigated in order to account for the post-failure progressive material degradation. Finally, experimental results on coupons tests are used to identify the macroscopic behavior and the effective properties of the considered material. Experimental impact tests are then used to investigate the post-peak behavior.
机译：汽车制造商必须开发轻型结构，以限制由用于混合动力和电动汽车的新型先进动力总成系统引起的重量增加。由于悬垂性，刚度，改善的延展性和损伤耐受性，机织复合材料越来越多地用于与碰撞相关的结构零件的设计。在介绍由工业应用设定的策略和条件之前，将讨论LS-DYNA有限元代码中具有显式时间积分的复合材料可用的主要当前建模技术。然后将提出以线性和非线性行为以及可塑性定义为特征的用户定义的复合材料模型（UMAT）。最大应力准则用于检测帘布层上的失效。为了解决故障后渐进的材料退化，已经研究了四个故障后损伤定义。最后，在试样测试中的实验结果被用来识别所考虑材料的宏观行为和有效特性。然后使用实验性冲击测试来调查峰后行为。

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  • 来源
    《Composite Structures》 |2014年第8期|75-88|共14页
  • 作者

    Olivier Cousigne; David Moncayo; Daniel Coutellier; Pedro Camanho; Hakim Naceur;

  • 作者单位

    DAIMLER AG, 059 HPC: X631, D-71059 Sindelfingen, Germany,Univ. Lille Nord de France, F-59000 Lille, France,UVHC, LAMIH UMR CNRS 8201, F-59300 Valenciennes, France;

    DAIMLER AG, 059 HPC: X631, D-71059 Sindelfingen, Germany;

    Univ. Lille Nord de France, F-59000 Lille, France,UVHC, LAMIH UMR CNRS 8201, F-59300 Valenciennes, France;

    DEMec, Faculdade de Engenharia Universidade do Porto, P-4200-465 Porto, Portugal;

    Univ. Lille Nord de France, F-59000 Lille, France,UVHC, LAMIH UMR CNRS 8201, F-59300 Valenciennes, France;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Woven fabric composites; Nonlinearity; Plasticity; Damage; UMAT; Impact;

    机译：机织织物复合材料;非线性;可塑性;损伤;UMAT;影响力;

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