Multiscale ceramic matrix composite thermomechanical damage model with fracture mechanics and internal state variables

Skinner, Travis; Rai, Ashwin; Chattopadhyay, Aditi

doi:10.1016/j.compstruct.2019.111847

Cited by 23 publications

(13 citation statements)

References 25 publications

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“…According to principle of materials fracture mechanic, pores present would act as stress concentration points, and they are likely to initiate crack in ceramic bodies. Therefore, ceramics with higher apparent porosity would possess weaker points and subsequently reducing the MOR's mechanical strength [87][88][89].…”

Section: Correlation Between Firing Shrinkage Water Absorption Appare...mentioning

confidence: 99%

Application of General Full Factorial Statistical Experimental Design’s Approach for the Development of Sustainable Clay-Based Ceramics Incorporated with Malaysia’s Electric Arc Furnace Steel Slag Waste

et al. 2021

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This study aims to optimize the composition (body formulation) and firing temperature of sustainable ceramic clay-based ceramics incorporated with electric arc furnace (EAF) steel slag waste using general full factorial design (GFFD). The optimization is necessary to minimize drawbacks of high iron oxide’s fluxing agent (originated from electric arc furnace, EAF steel slag waste), which led to severe surface defects and high closed porosity issue of the ceramics. Statistical analysis of GFFD including model adequacy checking, analysis of variance (ANOVA), interaction plots, regression model, contour plot and response optimizer were conducted in the study. The responses (final properties of ceramics) investigated were firing shrinkage, water absorption, apparent porosity, bulk density and modulus of rupture (MOR). Meanwhile, the factors employed in experimental parameters were weight percentage (wt.%) of EAF slag added and firing temperature. Upon statistical analysis, GFFD has deduced that wt.% amount of EAF slag added and firing temperatures are proven to significantly influence the final properties of the clay-based ceramic incorporated with EAF slag. The results of conducted statistical analysis were also highly significant and proven valid for the ceramics. Optimized properties (maximum MOR, minimum water absorption and apparent porosity) of the ceramic were attained at 50 wt.% of EAF slag added and firing temperature of 1180 °C.

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Section: Correlation Between Firing Shrinkage Water Absorption Appare...mentioning

confidence: 99%

Application of General Full Factorial Statistical Experimental Design’s Approach for the Development of Sustainable Clay-Based Ceramics Incorporated with Malaysia’s Electric Arc Furnace Steel Slag Waste

et al. 2021

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“…Combining Equations (14)− (18) and meanwhile recalling Equation (9) for the residual strain, the two-dimensional constitutive relationship for orthotropic CMCs can be completely characterized with respect to the reference coordinate system.…”

Section: Relations In Equationmentioning

confidence: 99%

“…In recent years, several more CDM models have been proposed for C/SiC, SiC/SiC, and oxide/oxide CMCs. [13][14][15][16][17][18][19][20] The damage evolution behavior and stiffness degradation laws were characterized, and finally the anisotropic stressstrain relationships were described. In those models, the effective damage variables that reflect stiffness variation were formulated as functions of thermodynamic forces based on damage coupling method, 21 which is seldom used to reveal the microscopic damage mechanisms.…”

Section: Introductionmentioning

confidence: 99%

“…Since observed nonlinearity of CMCs actually relates to the progressive propagation and deflection of microcracks, continuum damage mechanics (CDM) model is therefore suitable for predicting the constitutive behavior of such composite materials. In recent years, several more CDM models have been proposed for C/SiC, SiC/SiC, and oxide/oxide CMCs 13‐20 . The damage evolution behavior and stiffness degradation laws were characterized, and finally the anisotropic stress‐strain relationships were described.…”

Section: Introductionmentioning

confidence: 99%

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Constitutive model and failure criterion for orthotropic ceramic matrix composites under macroscopic plane stress

et al. 2020

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To predict the nonlinear stress-strain behavior and the rupture strength of orthotropic ceramic matrix composites (CMCs) under macroscopic plane stress, a concise damage-based mechanical theory including a new constitutive model and two kinds of failure criteria was developed in the framework of continuum damage mechanics (CDM). The damage constitutive model was established using strain partitioning and damage decoupling methods. Meanwhile, the failure criteria were formulated in terms of damage energy release rate (DERR) in order to correlate the failure property of CMCs with damage driving forces, and the maximum DERR criterion and the interactive DERR criterion were suggested simultaneously. For the sake of model evaluation, the theory was applied to a typical CMC with damageable and nonlinear behavior, that is, 2D-C/SiC. The damage evolution law, strain response and rupture strength under incremental cyclic tension along both on-axis and off-axis directions were completely investigated. Comparison between theoretical predictions and experimental data illustrates that the newly developed mechanical theory is potential to give reasonable and accurate results of both stress-strain response and failure property for orthotropic CMCs.

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“…The three-phase micromechanics, the shear-lag, and the continuum fracture mechanics models were integrated with a statistical model in the repeating unit cell to predict the progressive damage and fatigue life of the composite structures. Skinner et al [15] developed a multiscale damage model for length scaledependent behavior of fiber-reinforced CMCs. The damage mechanism of scale-specific brittle matrix damage initiation and propagation was considered.…”

Section: Introductionmentioning

confidence: 99%

Damage accumulation and lifetime prediction of fiber-reinforced ceramic-matrix composites under thermomechanical fatigue loading

2020

High Temperature Materials and Processes

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In this paper, the damage accumulation and life prediction in fiber-reinforced ceramic-matrix composites (CMCs) subjected to thermomechanical fatigue (TMF) loading are investigated. The relationships between TMF damage mechanisms, fatigue hysteresis-based damage parameters, fraction of broken fiber, and applied cycles are established. Evolution of fatigue hysteresis dissipated energy, fatigue hysteresis modulus, fatigue peak strain, fatigue broken fiber fraction versus applied cycle curves, and the fatigue life S–N curves is analyzed. Damage accumulation and fatigue life of cross-ply silicon carbide/magnesium aluminosilicate composite under in-phase (IP)- and out-of-phase (OP)-TMF and isothermal fatigue (IF) loading are predicted. Under the same fatigue peak stress, the fatigue lifetime decreases from IF loading at 566°C to IF loading at 1,093°C, IP-TMF and OP-TMF. The TMF loading significantly reduced the fatigue lifetime of CMCs.

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Multiscale ceramic matrix composite thermomechanical damage model with fracture mechanics and internal state variables

Cited by 23 publications

References 25 publications

Application of General Full Factorial Statistical Experimental Design’s Approach for the Development of Sustainable Clay-Based Ceramics Incorporated with Malaysia’s Electric Arc Furnace Steel Slag Waste

Application of General Full Factorial Statistical Experimental Design’s Approach for the Development of Sustainable Clay-Based Ceramics Incorporated with Malaysia’s Electric Arc Furnace Steel Slag Waste

Constitutive model and failure criterion for orthotropic ceramic matrix composites under macroscopic plane stress

Damage accumulation and lifetime prediction of fiber-reinforced ceramic-matrix composites under thermomechanical fatigue loading

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