A micromechanical damage model for effective elastoplastic behavior of partially debonded ductile matrix composites

2001 ◽  
Vol 38 (36-37) ◽  
pp. 6307-6332 ◽  
Author(s):  
J.W. Ju ◽  
H.K. Lee
Keyword(s):  
Damage Model ◽  
Matrix Composites ◽  
Elastoplastic Behavior ◽  
Micromechanical Damage ◽  
Micromechanical Damage Model

A Micromechanical Damage Model for Uniaxially Reinforced Composites Weakened by Interfacial Arc Microcracks

1991 ◽  
Vol 58 (4) ◽  
pp. 923-930 ◽  
Author(s):  
J. W. Ju
Keyword(s):  
Damage Model ◽  
Kinetic Equations ◽  
Material Constant ◽  
Matrix Composites ◽  
Damage Models ◽  
Tension Tests ◽  
Micromechanical Damage ◽  
Deformation Processes ◽  
Fiber Matrix ◽  
Micromechanical Damage Model

A micromechanical anisotropic damage model is presented for uniaxially reinforced (brittle matrix) composites weakened by an ensemble of (fiber/matrix) interfacial microcracks. All microcracks are assumed to occur along the fiber/matrix interfaces, and are modeled as arc microcracks under “cleavage 1” deformation processes. Microcrack-induced strains and overall elastic-damage compliances are analytically derived based on micromechanical bimaterial (interfacial) arc-microcrack opening displacements and mesostructural probabilistic distributions. Both “stationary” and “evolutionary” damage models are given. In particular, microcrack kinetic equations are constructed based on micromechanical fracture criterion and mesostructural geometry in a representative volume element. Simple and efficient computational algorithms as well as some numerical uniaxial tension tests are also presented. Finally, it is noted that not a single arbitrary (fitted) “material constant” is employed in the present work.

Statistical micromechanical damage model for SH-SFRC under tensile load considering the interfacial slip-softening and matrix spalling effects

2021 ◽  
pp. 105678952110112
Author(s):  
Hehua Zhu ◽  
Xiangyang Wei ◽  
J Woody Ju ◽  
Qing Chen ◽  
Zhiguo Yan ◽  
...  
Keyword(s):  
Strain Hardening ◽  
Steel Fiber ◽  
Damage Model ◽  
Fiber Reinforced Concrete ◽  
Uniaxial Tensile ◽  
Interfacial Slip ◽  
Fiber Reinforced ◽  
Micromechanical Damage ◽  
The Impact ◽  
Micromechanical Damage Model

Strain hardening behavior can be observed in steel fiber reinforced concretes under tensile loads. In this paper, a statistical micromechanical damage framework is presented for the strain hardening steel fiber reinforced concrete (SH-SFRC) considering the interfacial slip-softening and matrix spalling effects. With a linear slip-softening interface law, an analytical model is developed for the single steel fiber pullout behavior. The crack bridging effects are reached by averaging the contribution of the fibers with different inclined angles. Afterwards, the traditional snubbing factor is modified by considering the fiber snubbing and the matrix spalling effects. By adopting the Weibull distribution, a statistical micromechanical damage model is established with the fracture mechanics based cracking criteria and the stress transfer distance. The comparison with the experimental results demonstrates that the proposed framework is capable of reproducing the SH-SFRC’s uniaxial tensile behavior well. Moreover, the impact of the interfacial slip-softening and matrix spalling effects are further discussed with the presented framework.

On a 3D micromechanical damage model

2010 ◽  
Vol 166 (1-2) ◽  
pp. 153-162 ◽  
Author(s):  
C. Dascalu ◽  
A. M. Dobrovat ◽  
M. Tricarico
Keyword(s):  
Damage Model ◽  
Micromechanical Damage ◽  
Micromechanical Damage Model
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