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A multi phase-field fracture model for long fiber reinforced composites based on the Puck theory of failure

机译：基于冰球故障理论的长纤维增强复合材料多相场断裂模型

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摘要

Phase-Field (PF) methods of fracture have emerged as powerful modeling tools for triggering fracture events in solids. These numerical techniques efficiently alleviate mesh dependent pathologies and are very suitable for characterizing brittle as well as quasi-brittle fracture in a wide range of engineering materials and structures including fiber reinforced composites. In this work, a multi phase-field model relying on the Puck's failure theory is proposed for triggering intra-laminar cracking in long fiber reinforced composites. The current formulation encompasses the differentiation of fiber and inter-fiber (matrix-dominated) failure phenomena via the consideration of two independent phase-field damage-like variables, and the corresponding evolution equations and length scales. Moreover, for matrix-dominated deformation states, the present formulations endow the incorporation of plastic effects via an invariant-based plasticity model. Special attention is also devoted to its finite element implementation, which is conducted using the user-defined capabilities UMAT and UEL of ABAQUS, in conjunction with the thorough assessment of its thermodynamic consistency. Several representative applications pinpoint the applicability of the proposed computational tool.
机译：相域（PF）裂缝方法已成为强大的建模工具，用于触发固体中的断裂事件。这些数值技术有效缓解网格依赖性病理学，并且非常适合于在包括纤维增强复合材料的各种工程材料和结构中表征脆性以及准脆性骨折。在这项工作中，提出了一种依赖于冰球的故障理论的多相场模型，用于在长纤维增强复合材料中触发层内裂缝。目前的制剂通过考虑两个独立的阶段损伤样变量以及相应的演化方程和长度尺度来包括光纤和光纤间（矩阵主导）故障现象的分化。此外，对于基质主导的变形状态，本制剂通过不变的可塑性模型赋予塑性效果。特别注意其有限元实现，其使用ABAQUS的用户定义的能力UMAT和UEL进行了，与其热力学一致性的全面评估。几个代表性应用程序确定所提出的计算工具的适用性。

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  • 来源
    《Composite Structures》 |2020年第11期|112446.1-112446.14|共14页
  • 作者

    Dean A.; Kumar P. K. Asur Vijaya; Reinoso J.; Gerendt C.; Paggi M.; Mahdi E.; Rolfes R.;

  • 作者单位

    Leibniz Univ Hannover Inst Struct Anal Appelstr 9A D-30167 Hannover Germany|Univ Seville Sch Engn Elastic & Strength Mat Grp Camino Descubrimientos S-N Seville 41092 Spain;

    IMT Sch Adv Studies Lucca Piazza San Francesco 19 I-55100 Lucca Italy;

    Univ Seville Sch Engn Elastic & Strength Mat Grp Camino Descubrimientos S-N Seville 41092 Spain;

    Leibniz Univ Hannover Inst Struct Anal Appelstr 9A D-30167 Hannover Germany;

    IMT Sch Adv Studies Lucca Piazza San Francesco 19 I-55100 Lucca Italy;

    Qatar Univ Coll Engn Dept Mech & Ind Engn POB 2713 Doha Qatar;

    Leibniz Univ Hannover Inst Struct Anal Appelstr 9A D-30167 Hannover Germany;

  • 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

    Fiber reinforced composites; Fracture mechanics; Finite Element Method (FEM); Phase-field modeling;

    机译：None;

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