Failure analysis of C/SiC composites plate with a hole by the PFA and DIC method

Gao, Xiguang; Yu, Guoqiang; Xue, Jiangang; Song, Yang

doi:10.1016/j.ceramint.2017.01.051

Cited by 36 publications

(5 citation statements)

References 36 publications

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“…Meanwhile, the shear strain exy drove longitudinal cracks propagation along the loading axis. 58,59 It can be concluded that the damage mechanism of the material strength failure is tension-shear destruction in the high strain concentration regions.…”

Section: Test Resultsmentioning

confidence: 99%

Experimental investigation on the axial compression behaviour of perforated glass fibre reinforced plastic medium-length tubes

Feng

2023

Journal of Composite Materials

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This paper aims to investigate the axial compression behaviour of perforated glass fibre reinforced plastic (GFRP) circular tubes. A total of 12 GFRP medium-length tubes with and without circular holes were tested under axial compression. The influence of hole size and hole quantity on the failure mode and mechanical behaviour of perforated GFRP tubes were carefully evaluated. The overall buckling failure and material strength failure, mainly determined by the hole size, were observed in the axial compression tests. The critical load and axial stiffness of the perforated tubes decreased further with the increase of hole sizes and quantities, compared to those of the intact GFRP tubes. To reveal the damage mechanism of perforated GFRP tubes, three-dimensional digital image correlation (3D-DIC) technique was used to analyse the evolution of full-field strain around the hole. It was demonstrated that the damage mechanisms of the overall buckling failure and material strength failure were respectively compression-shear destruction and tension-shear destruction in the high strain concentration regions around the hole. Finally, design-oriented equations were proposed to predict the critical load and axial stiffness of perforated GFRP tubes under axial compression, and 95% confidence interval was used for interval estimation. The proposed equations were in good agreement with the test results. In addition, the prediction results of axial stiffness are generally more accurate than that of critical load.

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Section: Test Resultsmentioning

confidence: 99%

Experimental investigation on the axial compression behaviour of perforated glass fibre reinforced plastic medium-length tubes

Feng

2023

Journal of Composite Materials

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“…Silicon-carbon-fiber-reinforced silicon carbide matrix composites (SiC f /SiC) are regarded as one of the most promising materials for aircraft hot section components due to their excellent mechanical properties in hightemperature environments. [1][2][3][4][5][6][7][8][9] When assembling complex high-temperature section components, ceramic-matrix composites (CMCs) joints with high mechanical properties are used to ensure the structural strength of the joint. 10,11 The 2D CMCs z-pinned joint is a mechanical joint with excellent performance, which could be widely used in the connection of complex aircraft thermal sections in the future.…”

Section: Introductionmentioning

confidence: 99%

“…Silicon–carbon–fiber‐reinforced silicon carbide matrix composites (SiC f /SiC) are regarded as one of the most promising materials for aircraft hot section components due to their excellent mechanical properties in high‐temperature environments 1–9 . When assembling complex high‐temperature section components, ceramic–matrix composites (CMCs) joints with high mechanical properties are used to ensure the structural strength of the joint 10,11 .…”

Section: Introductionmentioning

confidence: 99%

Shear failure evolution and its dispersion of plain woven ceramic matrix composites z‐pin structure

Shi³

et al. 2022

Int J Applied Ceramic Tech

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In this paper, the digital image correlation technique was applied to the shear test of 2D SiC/SiC composites z-pin with the purpose of analyzing the shear behavior of the plain woven pin and studying the structure factors of test results dispersion. After obtaining the strain-stress curves of the joint's connection region, the evolution of z-pin shear failure process was investigated. The z-pin's failure fractures were observed, and the main factors of its dispersion of shear mechanical properties were discussed. Changing the yarn parameter of model building and importing into Workbench for calculation, the average stress results in the shear plane were obtained. Different simulation results show that optimization of plain-woven pin structure parameters can effectively improve its shear strength.

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“…No matter whether laminated plates are applied as decorative parts, outsourcing parts, or load bearing components, notch-induced stress concentration presents a common and critical issue in structural analysis [3][4][5][6]. As studied by Nassiraei and Rezadoost, the stress concentration factors (SCFs) in circular hollow-section X-connections retrofitted Polymers 2022, 14, 5552 2 of 29 with fiber-reinforced polymer (FRP) under compressive load have been evaluated [7].…”

Section: Introductionmentioning

confidence: 99%

A New Stress-Based Formulation for Modeling Notched Fiber-Reinforced Laminates

et al. 2022

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Laminated plates are often modeled with infinite dimensions in terms of the so-called Whitney–Nuismer (WN) stress criteria, which form a theoretical basis for predicting the residual properties of open-hole structures. Based upon the WN stress criteria, this study derived a new formulation involving finite width; the effects of notch shape and size on the applicability of new formulae and the tensile properties of carbon-fiber-reinforced plastic (CFRP) laminates were investigated via experimental and theoretical analyses. The specimens were prepared by using laminates reinforced by plain woven carbon fiber fabrics and machined with or without an open circular hole or a straight notch. Standard tensile tests were performed and measured using the digital image correlation (DIC) technique, aiming to characterize the full-field surface strain. Continuum damage mechanics (CDMs)-based finite element models were developed to predict the stress concentration factors and failure processes of notched specimens. The characteristic distances in the stress criterion models were calibrated using the experimental results of un-notched and notched specimens, such that the failure of carbon fiber laminates with or without straight notches could be analytically predicted. The experimental results demonstrated well the effectiveness of the present formulations. The new formula provides an effective approach to implementing a finite-width stress criterion for evaluating the tensile properties of notched fiber-reinforced laminates. In addition, the notch size has a great effect on strength prediction while the fiber direction has a great influence on the fracture mode.

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Failure analysis of C/SiC composites plate with a hole by the PFA and DIC method

Cited by 36 publications

References 36 publications

Experimental investigation on the axial compression behaviour of perforated glass fibre reinforced plastic medium-length tubes

Experimental investigation on the axial compression behaviour of perforated glass fibre reinforced plastic medium-length tubes

Shear failure evolution and its dispersion of plain woven ceramic matrix composites z‐pin structure

A New Stress-Based Formulation for Modeling Notched Fiber-Reinforced Laminates

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