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A nonlinear shell augmented finite element method for geometrically nonlinear analysis of multiple fracture in thin laminated composites

机译：薄叠层复合材料多重断裂几何非线性分析的非线性壳增强有限元方法

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摘要

A nonlinear shell augmented finite element method (NS-AFEM) is proposed in this paper to account for the multiple fractures and their interactive evolutions in thin laminated composites with large deformations. This NS-AFEM employed a nonlinear elemental condensation algorithm based on Newton-Raphson method, which explicitly treated the strong discontinuity of a cracked element without the need of extra nodes. In addition, an improved geometrically nonlinear shell-like cohesive zone model (CZM) was developed and integrated into the NS-AFEM to represent the nonlinear fracture processes of composites, including matrix cracking in tension/ compression, fiber tensile rupture and fiber compressive kinking, and interface delamination. The high-fidelity simulations in open-hole tension and three-point-bending tests of composite laminates demonstrate that the proposed method is capable of dealing with the geometrically nonlinear coupled crack system in thin laminated composites, which is of particular challenge in other alternative numerical methods.
机译：本文提出了一种非线性壳增强有限元方法（NS-AEM），以考虑具有大变形的薄层叠复合材料中的多重裂缝及其交互式化。该NS-AREM采用基于Newton-Raphson方法的非线性元素缩合算法，该方法明确地处理了裂纹元件的强不连续性而不需要额外节点。此外，开发了一种改进的几何非线性壳状粘性区模型（CZM）并集成到NS-AF中，以表示复合材料的非线性断裂过程，包括张力/压缩，纤维拉伸和纤维压缩扭结的基质裂缝，和接口分层。开孔张力的高保真模拟和复合层压板的三点弯曲试验表明，该方法能够处理薄型层叠复合材料中的几何非线性耦合裂纹系统，这在其他替代数值中是特殊的挑战方法。

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  • 来源
    《Thin-Walled Structures》 |2021年第4期|107433.1-107433.15|共15页
  • 作者

    Ma Xueshi; Xiong Ke; Yang Qingda; Wang Jia; Wang Liang;

  • 作者单位

    Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212100 Jiangsu Peoples R China|Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct Nanjing 210016 Peoples R China|Univ Miami Dept Mech & Aerosp Engn Coral Gables FL 33124 USA;

    Nanjing Univ Aeronaut & Astronaut State Key Lab Mech & Control Mech Struct Nanjing 210016 Peoples R China;

    Univ Miami Dept Mech & Aerosp Engn Coral Gables FL 33124 USA;

    Jiangsu Univ Sci & Technol Sch Mech Engn Zhenjiang 212100 Jiangsu Peoples R China;

    Shanghai Jiao Tong Univ Sch Naval Architecture Ocean & Civil Engn Dept Engn Mech Shanghai 200240 Peoples R China;

  • 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

    Nonlinear shell augmented finite element; Coupled multiple fracture; Thin laminated composites; Geometrical nonlinearity; Shell-like cohesive zone model;

    机译：非线性壳增强有限元;耦合多重裂缝;薄叠层复合材料;几何非线性;壳种凝聚区模型;

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