Damage and Fracture of Ceramic-Matrix Composites Under Stochastic Loading

2021 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Damage And Fracture ◽  
Stochastic Loading

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

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2469 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Fiber Strength ◽  
Ceramic Matrix Composites ◽  
Tangent Modulus ◽  
Interface Debonding ◽  
Matrix Composites ◽  
Fiber Volume ◽  
Damage And Fracture ◽  
Stochastic Loading ◽  
Composite Strain ◽  
Tensile Damage

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.

Sign in / Sign up

Export Citation Format

Share Document