Investigations of defect effect on dynamic compressive failure of 3D circular braided composite tubes with numerical simulation method

Liu, Tao; Wu, Xianyan; Sun, Bin; Fan, Wei; Wan-jin, Han; Yi, Honglei

doi:10.1016/j.tws.2020.107381

Cited by 45 publications

(24 citation statements)

References 34 publications

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“…[6][7][8] Pure CFRP structures are prone to local buckling, brittle fracture, inter-layer delamination and other instability fracture modes, which greatly reduce their energy absorption potential. [1,[9][10][11] Due to engineering factors (mechanical connection, etc. ), the fiber and matrix of composite materials are discontinuous, resulting in more complicated failure modes and extremely low crashworthiness of the structure.…”

Section: Introductionmentioning

confidence: 99%

Study on the axial impact of Al‐CFRP thin‐walled tubes with induced design

Zha

Wang

et al. 2022

Polymer Composites

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Metal-composite hybrid thin-walled tube has been widely studied due to its excellent lightweight characteristics and crashworthiness. In particular, there are few reports on the research and design of induced metal-composite thinwalled tubes under axial impact. Therefore, the crashworthiness of different induced Al-CFRP tubes was studied in this article by combining experimental and numerical simulation subjected to axial impact. The experimental results showed that the reasonable induced design is helpful to improve the crashworthiness of Al-CFRP hybrid tubes. Based upon the experimental tests and numerical modeling, the crashworthiness of the induced Al/CFRP tube was explored. Thereafter, the influence of structural parameters (CFRP fiber winding Angle, ratio of aluminum tube thickness to CFRP tube thickness) on the crashworthiness of induced Al-CFRP tube was investigated numerally, and the structural parameters were optimized by multi-objective design to obtain the optimal structural design parameters. And then the parametric study was carried out for exploring the effects of the hole diameter and hole number on the crushing behaviors of Al-CFRP hybrid tubes. Finally, a new multi-row induced structure was proposed. All multi-row induced configurations were evaluated by Complex Proportional Assessment Method (COPRAS), and the best induced configuration (C20 tube) was determined. Compared with the single-row induced structure with the best crashworthiness, the SEA, F mean , and CFE of the C20 tube increased by 4.41%, 5.24%, and 10.94%, respectively, and the F max of the C20 tube decreased by 6.59%.

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Section: Introductionmentioning

confidence: 99%

Study on the axial impact of Al‐CFRP thin‐walled tubes with induced design

Zha

Wang

et al. 2022

Polymer Composites

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“…Fiber breakage defects exist widely in advanced three-dimensional textile structural composites due to many kinds of complex manufacturing processes. Many researchers 23–27 have created fiber breakage defects by assigning a very small value of elastic constants to the local elements in the mesoscale model. In fact, this kind of method is not adaptable because fiber breakages are microscale defects.…”

mentioning

confidence: 99%

Predictions of the axial tensile property of the unidirectional composite influenced by microfiber breakage defects

Liu

Gao

Fan

et al. 2021

Textile Research Journal

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This paper primarily investigated the effect of fiber breakage defects on tensile properties of the unidirectional composite (UD) using the numerical simulation method. Different kinds of fiber breakage defects were firstly proved to exist in the UD according to the sub-micro computed tomography images at the microscale level. A strict random uniform distribution hypothesis was then proposed to introduce fiber breakage defects into the composite. Numerous microstructural models within random fiber breakage defects were created with the Monte Carlo method to analyze the fiber breakage defect effect on the UD. The results show that the tensile modulus of the UD was reduced by 17% when the fiber breakage defect volume fraction was only 1%, which indicates the effect of this kind of defect was very significant. The fiber volume fraction, defect volume fraction and property all have influences on the decrease of the UD caused by the fiber breakage defect. Finally, we derived a mathematical model to calculate the tensile modulus of the UD based on the numerical results. The proposed mathematical model has an application on the prediction of the axial modulus of the UD or the fiber tow containing large numbers of fiber breakage defects in the composites with complicated structure.

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“…Liu et al. 14 , 15 studied the effect of random defects in the fiber tows with different volume fractions on the compression properties of textile structural composites using a microstructural model. The results of these researches revealed that the mechanical properties of 3D braided composites decreased as the defect volume fraction increased.…”

mentioning

confidence: 99%

Failure behaviors of 3D braided composites with defects in different locations under low-velocity impact compression

Guo

Sun

et al. 2021

Textile Research Journal

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This paper aims to investigate the effects of the impurity defects in different locations on the transverse compressive behaviors of three-dimensional (3D) braided carbon fiber/epoxy composites under low-velocity impact. The composites with defects in different locations were prepared by placing polytetrafluoroethylene particles at the bottom surface, corner and center parts, respectively. The compression test was implemented with the drop-weight impact method. The failure morphologies were characterized using high-speed photography and micro computed tomography (Micro-CT). A mesoscale finite element model considering the defect was developed to enhance the physical understanding of the compression process. It is found that defects located at the corner zone and the central zone have a greater impact on the compression behavior of the 3D braided composite than the defect located at the bottom surface part. The defects at the corner and center zones reduce the compressive strength of the composite, increase the failure area, and cause severe damage to both the yarn and resin. In addition, the defect causes local stress concentration on the surrounding yarns. The defects in different locations cannot change the main shear failure mode of the 3D braided composite. It is shown that great attention should be given during the manufacturing or detection process to avoid such a deterioration effect of defects located in those zones on composite strength.

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Investigations of defect effect on dynamic compressive failure of 3D circular braided composite tubes with numerical simulation method

Cited by 45 publications

References 34 publications

Study on the axial impact of Al‐CFRP thin‐walled tubes with induced design

Study on the axial impact of Al‐CFRP thin‐walled tubes with induced design

Predictions of the axial tensile property of the unidirectional composite influenced by microfiber breakage defects

Failure behaviors of 3D braided composites with defects in different locations under low-velocity impact compression

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