Influence of applied in-plane strain on transverse thermal conductivity of 0°/90° and plain weave ceramic matrix composites

Zhang, Daxu; Hayhurst, D. R.

doi:10.1016/j.ijsolstr.2010.11.017

Cited by 26 publications

(17 citation statements)

References 18 publications

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“…However, the initial tow properties that have been calculated using the finite element method have been used as input data to the calculations on composites reported in Refs. [9,13,[21][22][23][24], and excellent predictions of experimental results have been made.…”

Section: Amoiplious Carbou Matiixmentioning

confidence: 78%

“…The initial property data has been used by other investigators [9,[21][22][23][24] to accurately predict the experimentally measured thermo-mechanical behavior of complex woven composites fabricated from both the HITCO C/C and DLR-XT C/C-SiC materials. Very good results have been achieved that vindicate the use of initial property values evaluated by the finite element method.…”

Section: Discussionmentioning

confidence: 99%

“…(5) and (12), for HITCO C/C and DLR-XT C/C-SiC, respectively, into Eq. (22) yields the respective values of the transverse shear modulus, G21 = 14.59 and 8.67 GPa. These calculated values are summarized in the last row of Table 9.…”

Section: Transverse Shearmentioning

confidence: 99%

“…However, the investigation to be reported here relates to the precise determination of composite properties from tow properties and constituent materials properties where accuracy is a prime concem as, for example, in Refs. [9,[21][22][23][24]. In the latter calculations, which were performed using finite element techniques at the homogenized tow level, any initial errors in the tow properties propagate throughout the solutions and unreliable component/ process properties at the composite level can result.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Initial Elastic Properties of Unidirectional Ceramic Matrix Composite Fiber Tows

Blacklock

Hayhurst

2012

Journal of Applied Mechanics

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The initial elastic properties of two unidirectional ceramic matrix composite tows, comprised of continuous, cylindrical flbers surrounded by one or more matrices, have been calculated using three different methods. The first uses finite element (FE) analysis of the tow to calculate values for elastic and shear moduli and Poisson's ratios in the three principal directions, and in the absence of confirmatory experimental data is regarded as the most accurate for a wide range of fiber/matrix geometries and materials. The other two models are (i) rule of mixtures, ROM/volume averaging and (ii) the approximate equations of Halpin-Tsai and analytical relations based on slab representation for composite materials that rely on the elastic properties and volume fractions of the constituent materials. Initial elastic properties of the tows determined by the FE method are presented, and they are compared with predictions made by the other two techniques.

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Section: Amoiplious Carbou Matiixmentioning

confidence: 78%

Section: Discussionmentioning

confidence: 99%

Section: Transverse Shearmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Initial Elastic Properties of Unidirectional Ceramic Matrix Composite Fiber Tows

Blacklock

Hayhurst

2012

Journal of Applied Mechanics

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“…Figures 10 and 14 of Zhang and Hayhurst (2010). The corresponding thermal analysis has been reported by Zhang and Hayhurst (2011).…”

Section: Formulation Of the Finite Element Approach For A Single Towmentioning

confidence: 95%

Effects of in-plane extension on transverse thermal conductivity of a carbon–carbon 8-harness satin weave composite

Zhang

Hayhurst

2016

International Journal of Damage Mechanics

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A finite element-based technique for coupled thermo-mechanical analysis of woven Ceramic MatrixComposites sheets is presented for the prediction of the degradation of transverse thermal transport behaviour with in-plane extension. The thermal conductivity-strain characteristics have been determined, at the tow level, from the properties of the constituent elements, and then extended to tows and composite. The non-linear thermal conductivity-extension behaviour of the tow has been discretised by multi-linear curves, and implemented in a user-defined subroutine in ABAQUS to model the behaviour of the homogenised orthotropic unidirectional tow and its matrix. By using this approach, an 8-Harness Satin weave HITCO C/C composite unit cell has then been analysed. The variation of through-thickness thermal conductivity degradation with in-plane extension has been predicted and compared with the results of experiments. Very good agreement has been achieved. Two classes of behaviour have been experimentally observed: one that exhibits a brittle response, and another that shows a quasi-ductile behaviour. Both classes of behaviour have been predicted and shown to relate, respectively, to strain localisation and instantaneous pull-out deactivation, without localisation being invoked. These responses are reflected directly in the predicted and experimental rates of decay of transverse thermal conductivity with axial extension. It is advocated that the reduction in transverse thermal conductivity with extension and damage can be used as a Structural Integrity Monitor for CMC operational components.

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Using finite element analysis to understand the mechanical properties of ceramic matrix composites

Choi¹,

Heness²,

Ben‐Nissan³

2018

Advances in Ceramic Matrix Composites

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Influence of applied in-plane strain on transverse thermal conductivity of 0°/90° and plain weave ceramic matrix composites

Cited by 26 publications

References 18 publications

Initial Elastic Properties of Unidirectional Ceramic Matrix Composite Fiber Tows

Initial Elastic Properties of Unidirectional Ceramic Matrix Composite Fiber Tows

Effects of in-plane extension on transverse thermal conductivity of a carbon–carbon 8-harness satin weave composite

Using finite element analysis to understand the mechanical properties of ceramic matrix composites

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