Micromechanical modeling of loading rate–dependent tensile damage and fracture behavior in fiber-reinforced ceramic-matrix composites

2021 ◽  
Author(s):  
Longbiao Li
Keyword(s):  
Fracture Behavior ◽  
Loading Rate ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Micromechanical Modeling ◽  
Matrix Composites ◽  
Fiber Reinforced ◽  
Rate Dependent ◽  
Damage And Fracture ◽  
Tensile Damage

scholarly journals Modeling Tensile Damage and Fracture Behavior of Fiber-Reinforced Ceramic-Matrix Minicomposites

Materials ◽  
2020 ◽  
Vol 13 (19) ◽  
pp. 4313
Author(s):  
Zhongwei Zhang ◽  
Yufeng Liu ◽  
Longbiao Li ◽  
Daining Fang
Keyword(s):  
Fracture Behavior ◽  
Tensile Load ◽  
Nonlinear Behavior ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Fiber Reinforced ◽  
Internal Damage ◽  
Damage Mechanisms ◽  
Damage And Fracture ◽  
Tensile Damage

Evolution of damage and fracture behavior of fiber-reinforced mini ceramic-matrix composites (mini-CMCs) under tensile load are related to internal multiple damage mechanisms, i.e., fragmentation of the brittle matrix, crack defection, and fibers fracture and pullout. In this paper, considering multiple micro internal damage mechanisms and related models, a micromechanical constitutive stress–strain relationship model is developed to predict the nonlinear mechanical behavior of mini-CMCs under tensile load corresponding to different damage domains. Relationships between multiple micro internal damage mechanisms mentioned above and tensile micromechanical multiple damage parameters are established. Experimental tensile nonlinear behavior, internal damage evolution, and micromechanical tensile damage parameters corresponding to different damage domains of two different types of mini-CMCs are predicted. The effects of constitutive properties and damage-related parameters on nonlinear behavior of mini-CMCs are discussed.

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