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On the basis of the experimental results in previous work, a multiscale numerical modeling strategy on the failure behaviour of three-dimensional orthogonal woven carbon/carbon composites under pin-loading was presented. In consideration of the complexity of internal woven architecture, the finite element analysis at micro-/meso-/macro-scale levels was performed to exhibit the effective material properties and mechanical behaviour. The geometric models were reconstructed via X-ray tomography technology to obtain feasible configurations based on actual microstructure, meanwhile the models considered the fibers random arrangement in the yarn and voids statistical distribution in the matrix. The anisotropic composites damage evolution was characterized by Murakami-Ohno damage theory. Additionally, for a further exploration on the practical bearing failure mode, the macro-scale open-hole plate model was established using mesh superposition method to expose the damage mechanism of each component in composites at hole edge, and the numerical predictions agreed reasonably well with the experimental results.
Yanfeng Zhang; Zhengong Zhou; Shiming Zu; Zhiyong Tan. Multiscale numerical investigation on failure behaviour of three-dimensional orthogonal woven carbon/carbon composites subjected to pin-loading. Ceramics International 2021, 1 .
AMA StyleYanfeng Zhang, Zhengong Zhou, Shiming Zu, Zhiyong Tan. Multiscale numerical investigation on failure behaviour of three-dimensional orthogonal woven carbon/carbon composites subjected to pin-loading. Ceramics International. 2021; ():1.
Chicago/Turabian StyleYanfeng Zhang; Zhengong Zhou; Shiming Zu; Zhiyong Tan. 2021. "Multiscale numerical investigation on failure behaviour of three-dimensional orthogonal woven carbon/carbon composites subjected to pin-loading." Ceramics International , no. : 1.
An experimental approach of three-dimensional woven carbon/carbon composites arranged in various geometrical configuration is presented in this paper. Seven types of samples divided into three groups were tested under pin-loading to determine the effects of width-to-hole diameter ratio (W/D), edge distance -to- hole diameter ratio (E/D) and hole diameter-to- thickness ratio (D/t) on the failure mode. For an advanced understanding of failure propagation, damage mechanism was observed and assessed combining acoustic emission monitoring. The experimental results and observations indicated that net-tension failure and shearing-out failure switched to bearing failure with the increasing ratio of W/D and E/D, respectively. while D/t hardly affected the failure mode. Major features of the damage mechanisms included matrix crashing and cracking, fiber micro-buckling and bending, interface debonding and fiber breakage with different acoustic emission signal ranges.
Yanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. Experimental characterization of failure behaviour for three-dimensional woven carbon/carbon composites under pin-loading. Ceramics International 2020, 47, 9462 -9470.
AMA StyleYanfeng Zhang, Zhengong Zhou, Shidong Pan, Zhiyong Tan. Experimental characterization of failure behaviour for three-dimensional woven carbon/carbon composites under pin-loading. Ceramics International. 2020; 47 (7):9462-9470.
Chicago/Turabian StyleYanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. 2020. "Experimental characterization of failure behaviour for three-dimensional woven carbon/carbon composites under pin-loading." Ceramics International 47, no. 7: 9462-9470.
In the present work, an experimental investigation on the failure of 3D woven carbon/carbon all-composites mechanically fastened bolted joints with protruding-head and countersunk-head bolts has been implemented under out-of-plane loading in air at room temperature and up to 1100 °C for the first time. The load-displacement curves and main damage mechanisms for the required temperature points were determined and evaluated, respectively. It follows that, for room temperature, the global mechanical response was characterized by pseudoplastic, and the failure was dominated by the damage mechanisms including matrix cracking, interface debonding and threads fracture, especially, edge bending to breakage occurring for countersunk fastener. For 1100 °C, silicon carbide ceramic anti-oxidation coating was applied to prevent from oxidizing. Due to the relief of the thermal stresses, joints bearing capacity was enhanced by fiber/matrix interface performance improvement accompanying with a brittleness tendency of mechanical response, and the dominating failure mechanisms were carbon/carbon substrate oxidation caused by air entering through the cracks in SiC coating.
Yanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. Comparison on failure behavior of three-dimensional woven carbon/carbon composites joints subjected to out-of-plane loading at room and high temperature. Composites Communications 2020, 23, 100567 .
AMA StyleYanfeng Zhang, Zhengong Zhou, Shidong Pan, Zhiyong Tan. Comparison on failure behavior of three-dimensional woven carbon/carbon composites joints subjected to out-of-plane loading at room and high temperature. Composites Communications. 2020; 23 ():100567.
Chicago/Turabian StyleYanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. 2020. "Comparison on failure behavior of three-dimensional woven carbon/carbon composites joints subjected to out-of-plane loading at room and high temperature." Composites Communications 23, no. : 100567.
In this paper, by use of test combined with numerical simulation, the out-of-plane loading-bearing failure process of CFRP and C/C joints were studied, while Hashin failure criterion was selected to predict the damage and the failure morphologies were observed. Results show that the failure process of CFRP joint is characterized by a three-peak mechanical response and bending failure accompanied the failure mechanism of interface debonding and cracking of fiber and matrix, and that of C/C joint is characterized by pseudoplasticity and shearing failure accompanied a large number of matrix cracks, local interface debonding and fiber kink and buckling.
Yanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. Comparison of failure modes and damage mechanisms of CFRP and C/C composite joints under out-of-plane loading. Mechanics of Advanced Materials and Structures 2020, 1 -10.
AMA StyleYanfeng Zhang, Zhengong Zhou, Shidong Pan, Zhiyong Tan. Comparison of failure modes and damage mechanisms of CFRP and C/C composite joints under out-of-plane loading. Mechanics of Advanced Materials and Structures. 2020; ():1-10.
Chicago/Turabian StyleYanfeng Zhang; Zhengong Zhou; Shidong Pan; Zhiyong Tan. 2020. "Comparison of failure modes and damage mechanisms of CFRP and C/C composite joints under out-of-plane loading." Mechanics of Advanced Materials and Structures , no. : 1-10.
The loading and the failure mode of metal hexagon bolt joints and metal counter-sunk bolt joints of C/C composites were investigated. The joints were tested for out-of-plane loading at two temperatures (600 °C and 800 °C). The failure morphology of a lap plate was investigated, and the main failure modes were determined. The typical load-displacement curve was characterized and the test was simulated using ABAQUS non-linear finite element software. Furthermore, progressive damage was induced, and comparison of the finite element simulation with the experimental data revealed that the failures mainly occurred in the lower lap plate and were dominated by cracking and delamination of the matrix, accompanied by the pull-out of a small number of piercing fibers. Finally, the influences of the temperature, nut radius, and fixture geometry on the critical load were determined via simulation.
Yanfeng Zhang; Zhengong Zhou; Zhiyong Tan. Experimental and Finite Element Research on the Failure Mechanism of C/C Composite Joint Structures under Out-of-Plane Loading. Materials 2019, 12, 2922 .
AMA StyleYanfeng Zhang, Zhengong Zhou, Zhiyong Tan. Experimental and Finite Element Research on the Failure Mechanism of C/C Composite Joint Structures under Out-of-Plane Loading. Materials. 2019; 12 (18):2922.
Chicago/Turabian StyleYanfeng Zhang; Zhengong Zhou; Zhiyong Tan. 2019. "Experimental and Finite Element Research on the Failure Mechanism of C/C Composite Joint Structures under Out-of-Plane Loading." Materials 12, no. 18: 2922.