Modelling the tensile failure of composites with the floating node method

被引:96
作者
Chen, B. Y. [1 ]
Tay, T. E. [1 ]
Pinho, S. T. [2 ]
Tan, V. B. C. [1 ]
机构
[1] Natl Univ Singapore, Dept Mech Engn, 21 Lower Kent Ridge Rd, Singapore 119077, Singapore
[2] Imperial Coll London, Dept Aeronaut, South Kensington Campus, London SW7 2AZ, England
关键词
Floating node method; Composites; Modelling; Matrix crack; Delamination; Open-hole tension; FINITE-ELEMENT-METHOD; FIBER-REINFORCED COMPOSITES; CRACK-GROWTH; DELAMINATION; SIMULATION; FORMULATION; STRENGTH; DISCONTINUITIES; PROPAGATION; MECHANISMS;
D O I
10.1016/j.cma.2016.05.027
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
This paper presents the modelling of tensile failure of composites using novel enriched elements defined based on the floating node method. An enriched ply element is developed, such that a matrix crack can be modelled explicitly within its domain. An enriched cohesive element is developed to incorporate the boundaries of matrix cracks on the interface, such that the local stress concentrations on the interface can be captured. The edge status variable approach allows the automatic propagation of a large number of matrix cracks in the mesh. A laminate element is formed, such that a fixed, planar mesh can be used for laminates of arbitrary layups. The application examples demonstrate that the proposed method is capable of predicting several challenging scenarios of composites tensile failure, such as the large number matrix cracks, grip-to-grip longitudinal splits, widespread delamination, explosive splitting and distributed fibre breaking in the 0 plies, etc. The complete failure process of ply-blocked composite laminates, up to the final breaking of the loosened 0 degrees strips, is here firstly reproduced by modelling. (C) 2016 Elsevier B.V. All rights reserved.
引用
收藏
页码:414 / 442
页数:29
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