5.8 Modeling Mechanical Behavior of Ceramic Matrix Composites

Baranger, Emmanuel

doi:10.1016/b978-0-12-803581-8.09993-8

Cited by 2 publications

(2 citation statements)

References 117 publications

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“…The second idea is to split the contributions related to the different crack networks. The objective is to have a mechanical model that could be linked to a physicochemical one to treat self-healing aspects of lifetime predictions (Baranger, 2018; Cluzel et al., 2009; Genet et al., 2012). The present paper will focus only on the mechanical part of the model.…”

Section: Original Damage Modelmentioning

confidence: 99%

Accounting for frictional contact in an anisotropic damage model based on compliance tensorial variables, illustration on ceramic matrix composites

Baranger

2018

International Journal of Damage Mechanics

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Ceramic matrix composites have good thermomechanical properties at high or very high temperatures. The modeling of the crack networks associated to the degradation of such composites using damage mechanics is not straightforward. The main reason is the presence of a crack network mainly oriented by the loading direction, which is a priori unknown. To model this, compliance tensorial damage variables are used in a thermodynamic potential able to account for crack closure effects (unilateral contact). The damage kinematic is initially completely free and imposed by the evolution laws. The key point of the present paper is to account for friction in such cracks that can result in an apparent activation/deactivation of the shear damage. The initial model is enriched with an inelastic strain and a friction law. The plasticity criterion is expressed only using tensorial variables. The model is identified and illustrated on multiaxial data obtained at ONERA on tubes loaded in tension and torsion.

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Section: Original Damage Modelmentioning

confidence: 99%

Accounting for frictional contact in an anisotropic damage model based on compliance tensorial variables, illustration on ceramic matrix composites

Baranger

2018

International Journal of Damage Mechanics

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“…Even the bulk material properties of a monolithic matrix material cannot be used because the matrix undergoes massive changes when employed for a fiber-reinforced material due, to effects such as hindered matrix shrinkage during the manufacturing process [11]. Baranger has summarized damage models and the rupture criterion at different microscopic scales in his work where stress and strain are used as limits to design a CMC component [12]. A thermodynamical formulation of the anisotropic damage model is discussed by Wulfinghoff et al by linking crack channels and pores with degradation in properties [13].…”

Section: Introductionmentioning

confidence: 99%

Prediction of Failure in Ceramic Matrix Composites Using Damage-Based Failure Criterion

Jain

Koch

2020

J. Compos. Sci.

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This paper presents a damage-based failure criterion and its implementation in order to predict failure in ceramic matrix composites (CMC) manufactured via filament winding. The material behavior of CMCs is anisotropic and strongly depends on the angle between fiber orientation and loading direction. The inelastic behavior of laminates with different fiber orientations under tension and shear is modeled with the help of continuum damage mechanics. The parameters required for the damage model are obtained from a standard tensile and shear test. An isotropic damage law determines the evolution of damage in thermodynamic space and considers the interaction of damage parameters in different principal material directions. A quadratic damage-based failure criterion inspired by the Tsai-Wu failure criterion is proposed. Failure stress and strain can be predicted with higher accuracy compared to the Tsai-Wu failure criterion in stress- or strain-space. The use of the proposed damage limits allows designing a CMC component based on the microstructural phenomenon of stiffness loss. With the help of results obtained from modeling and experiments, fracture mechanics during the Iosipescu-shear test of CMCs and its capability to determine the shear strength of the material is discussed.

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5.8 Modeling Mechanical Behavior of Ceramic Matrix Composites

Cited by 2 publications

References 117 publications

Accounting for frictional contact in an anisotropic damage model based on compliance tensorial variables, illustration on ceramic matrix composites

Accounting for frictional contact in an anisotropic damage model based on compliance tensorial variables, illustration on ceramic matrix composites

Prediction of Failure in Ceramic Matrix Composites Using Damage-Based Failure Criterion

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