Flexural failure mechanism of 2.5D woven SiCf/SiC composites: Combination of acoustic emission, digital image correlation and X-ray tomography

Duan, Yadi; Qiu, Hai; Yang, Tiantian; Wang, XiaoMeng; Xie, Weihua; Qian, Kun; Zhang, Diantang

doi:10.1016/j.coco.2021.100921

Cited by 20 publications

(3 citation statements)

References 27 publications

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“…Before each test, the center position of the upper AE sensor is used as the AE location origin, which carried out AE wave source counting and location analysis at the damage location of the specimens. [18][19][20] With Δt, the time difference between the sensors S 1 and S 2 from point Q of the AE wave source, and v, the wave speed is, the positioning formula can be written as…”

Section: Methodsmentioning

confidence: 99%

Study on tensile properties of carbon fiber/epoxy laminated woven composites with ply splicing

Fang

Chen

Wang

et al. 2022

Journal of Industrial Textiles

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Ply splicing design is a crucial technology to realize the precise manufacturing of woven composite components with various complex shapes. This paper reports two ways of splicing, inter-layer splicing, and in-plane splicing. Two factors affecting the tensile properties of carbon fiber/epoxy laminated woven composites with ply splicing are discussed, including the number of continuous fabric layers on the surface and in-plane splicing spacing. The deterioration of the composites induced during the tensile test is characterized by acoustic emission and digital image correlation. The results reveal that the damage of the laminated woven composites with ply splicing occurs mainly at the butt jointing location and leads to fracture failure. Ply splicing has little effect on the tensile modulus of the composites. The tensile modulus is slightly reduced between 2% and 5%. But ply splicing has a more significant effect on its tensile strength. The total number of continuous fabric layers at the splice position approximately determines the strength retention ratio. The more the number of continuous fabric layers on the surface are, the higher the tensile strength of the composites. When the number of continuous fabric layers on the surface is three layers, the tensile strength retention ratio reaches 69%. The larger the splicing spacing is, the better the tensile properties of the composites. When the splicing spacing is increased to 30 mm, the tensile strength retention ratio reaches 77%.

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Section: Methodsmentioning

confidence: 99%

Study on tensile properties of carbon fiber/epoxy laminated woven composites with ply splicing

Fang

Chen

Wang

et al. 2022

Journal of Industrial Textiles

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“…Duan, et al, analyzed the bending progressive damage behaviors of 2.5D woven SiCf/SiC composites by acoustic emission (AE) technique. The results showed that the damage mechanism of the 2.5D woven SiCf/SiC composite was related to the structure of the preform and the direction of testing, with the material showing pseudo-ductile fracture along the warp direction and brittle fracture along the weft direction [ 19 ]. Younes, et al, carried out an optimal design of damage tolerance and modulus of elasticity for a representative volume cell of a 2.5D woven composite based on the three-dimensional Tsai-Wu strength criterion, and validated it against experimental results [ 20 ].…”

Section: Introductionmentioning

confidence: 99%

Quasi-Static Compression Response of Carbon Fiber Reinforced 2.5D Woven Composites at Different Loading Directions

Chen²,

Shen³

et al. 2022

Materials

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2.5D woven composites have been increasingly used in aerospace and military applications due to their excellent mechanical properties. In this research, 2.5D woven composites were produced, and their compression responses were investigated in different directions by compression experiments. XR-CT (X-ray computed tomography) technology was used to observe the microstructural damage profiles, and to analyze the failure mechanism of the material. The results show that when subjected to compression loads, the maximum load-bearing capacity of the material in the thickness direction was better than the maximum load-bearing capacity in the warp and weft directions. The compressive strength of the material in the warp and weft directions was lower than that in the thickness direction, and compression damage patterns in each direction also differed.

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“…The composite was prepared by VARI 17 process. The flexural properties, [18][19][20] tensile properties, 21 and impact properties 22 of materials were studied using AE testing. The failure mechanism of modified and unmodified 23 is discussed.…”

Section: Introductionmentioning

confidence: 99%

Mechanical failure characterization of oxygen plasma modified UHMWPE/vinyl ester composites using acoustic emission

Yan

Chen

et al. 2022

Journal of Industrial Textiles

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This study reveals the mechanical and interfacial bonding properties of glow discharge oxygen plasma modified ultrahigh molecular weight polyethylene (UHMWPE)/vinyl ester composites modified by oxygen plasma. The composites’ flexural, tensile, and impact-resistant properties were estimated, and the failure mechanism was analyzed by acoustic emission (AE) testing. The flexural stress, tensile stress, and impact-resistance force of the modified three plain weave structures composites are 193.37–734%, 11–15%, and 16–17% higher than those without modification. It depends on flexibility, interfacial bonding strength, reinforcement structure, and stiffness. In addition to the flexural properties, the tensile and impact properties increase with fiber volume fraction. In the AE test, the flexural and tensile cumulative energies without modification are 9230.42 mV*mS and 1.735 V*S higher than modified materials. The characteristic frequency range of each failure mechanism is determined by cluster analysis. Low, medium, and high frequency correspond to matrix cracking, fiber/matrix debonding, and fiber breakage. Oxygen plasma contributes to the wettability of the reinforcement and the interfacial bonding strength, resisting cracking growth.

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Flexural failure mechanism of 2.5D woven SiCf/SiC composites: Combination of acoustic emission, digital image correlation and X-ray tomography

Cited by 20 publications

References 27 publications

Study on tensile properties of carbon fiber/epoxy laminated woven composites with ply splicing

Study on tensile properties of carbon fiber/epoxy laminated woven composites with ply splicing

Quasi-Static Compression Response of Carbon Fiber Reinforced 2.5D Woven Composites at Different Loading Directions

Mechanical failure characterization of oxygen plasma modified UHMWPE/vinyl ester composites using acoustic emission

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