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Effect of Stochastic Loading on Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites

College of Civil Aviation, Nanjing University of Aeronautics and Astronautics, No.29 Yudao St., Nanjing 210016, China
Materials 2020, 13(11), 2469; https://doi.org/10.3390/ma13112469
Received: 27 April 2020 / Revised: 24 May 2020 / Accepted: 26 May 2020 / Published: 28 May 2020
In this paper, the effect of stochastic loading on tensile damage and fracture of fiber-reinforced ceramic-matrix composites (CMCs) is investigated. A micromechanical constitutive model is developed considering multiple damage mechanisms under tensile loading. The relationship between stochastic stress, tangent modulus, interface debonding and fiber broken is established. The effects of the fiber volume, interface shear stress, interface debonding energy, saturation matrix crack spacing and fiber strength on tensile stress–strain curve, tangent modulus, interface debonding fraction and fiber broken fraction are analyzed. The experimental tensile damage and fracture of unidirectional and 2D SiC/SiC composites subjected to different stochastic loading stress are predicted. When fiber volume increases, the initial composite strain decreases, the initial tangent modulus increases, the transition stress for interface debonding decreases and the initial fiber broken fraction decreases. When fiber strength increases, the initial composite strain and fiber broken fraction decrease. View Full-Text
Keywords: ceramic-matrix composites (CMCs); Stochastic loading; tensile; matrix cracking; interface debonding; fiber failure ceramic-matrix composites (CMCs); Stochastic loading; tensile; matrix cracking; interface debonding; fiber failure
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MDPI and ACS Style

Li, L. Effect of Stochastic Loading on Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites. Materials 2020, 13, 2469. https://doi.org/10.3390/ma13112469

AMA Style

Li L. Effect of Stochastic Loading on Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites. Materials. 2020; 13(11):2469. https://doi.org/10.3390/ma13112469

Chicago/Turabian Style

Li, Longbiao. 2020. "Effect of Stochastic Loading on Tensile Damage and Fracture of Fiber-Reinforced Ceramic-Matrix Composites" Materials 13, no. 11: 2469. https://doi.org/10.3390/ma13112469

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