Bearing strength and failure behaviour of composite pre-tightened multi-tooth joint

Gao, Yifeng; Zhang, Dongdong; Li, Feng; Zhao, Qi; Zhao, Zhiqin; Chen, Yan

doi:10.1016/j.compstruct.2021.114208

Cited by 13 publications

(1 citation statement)

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“…Despite the fact that the model exhibits some abilities in the damage characterization, it has limitations especially considering that the progressive damage of composites does not involve a distinct yielding stage [14]. Inspired by this, the continuum damage mechanics (CDM) model was developed as a flexible tool for strength analysis of unidirectional plies [15], laminates [16], and braided composites [17], by introducing the damage tensor to depict the anisotropic damage. From the framework of thermodynamics, the damage equation constructed based on the principle of minimum dissipation has the capability of reflecting the macroscopic damage mechanism of the composites.…”

Section: Introductionmentioning

confidence: 99%

Assessment of Mechanical Properties for Three-Dimensional Needled Composites: A Geometric Partitioning Strategy Dealing with Mesoscopic Needling Damage

Wang

Liu

et al. 2022

Materials

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A geometric partitioning strategy was proposed to evaluate the mechanical properties of three-dimensional needled composites. The microstructure of the composite was divided to accurately characterize the mesoscopic damage in the needling regions and the macroscopic damage in the un-needling regions, to balance the computational accuracy and efficiency. The general method of cells (GMC) models along with the damage criteria were established for different material phases in the needling regions, while the continuum damage mechanics (CDM) model was adopted to portray the damage evolution in the un-needling regions. Through conducting the multi-scale simulation, the mechanical properties of the needled composites were predicted, based upon which the effect of repeated needling on the mesoscale damage process was further investigated. Results showed that the predictions are in good agreement with the experiments, with a relative error of 2.6% for strength and 4.4% for failure strain. The proposed approach can provide guidance for the process optimization and design of needled composites.

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