Measurement of thermal diffusivity for alumina borosilicate glass bearing TRISO fuel particles: experiment and modelling correlation

Bari, Klaudio; Khan, Sohaib Z.; Lowe, Tristan; Farooqi, Johar

doi:10.1007/s10853-013-7265-1

Cited by 10 publications

(5 citation statements)

References 13 publications

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“…The final mesh is then imported to any standard finite element software package. Many researchers have used 3D image-based modelling technique successfully to model very complex materials such as: polyurethane foams [12], trabecular bone [13], nuclear composites [7,14,15] and graphite [11,16,17].…”

Section: Introductionmentioning

confidence: 99%

Multi-scale 3D image-based modelling of a carbon/carbon composite

Alghamdi¹,

Mummery²,

Sheikh³

2013

Modelling Simul. Mater. Sci. Eng.

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Detailed thermal and mechanical finite element analyses of woven composites are computationally challenging due to the heterogeneous nature and the geometrical complexity of the composite. In this paper two finite element three-dimensional image-based models at different length scales are used to evaluate the thermal diffusivity and stiffness of a 2D carbon/carbon composite. The micro-scale model was developed from SEM micrographs of the carbon tow whereas the macro-scale model was derived from high resolution x-ray tomographic images of the composite. The micro-scale model predicts thermal conductivities and Young's modulus at the tow scale in the three orthogonal directions (x, y and z). The output results from the micro-scale model are then incorporated in the macro-scale model to obtain through-thickness thermal diffusivity and in-plane Young's modulus. The modelling results are in excellent agreement with the experimental results obtained from the laser flash and tensile tests and the deviations are within the bounds of numerical error of 5%.

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Section: Introductionmentioning

confidence: 99%

Multi-scale 3D image-based modelling of a carbon/carbon composite

Alghamdi¹,

Mummery²,

Sheikh³

2013

Modelling Simul. Mater. Sci. Eng.

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“…The aim of the test was to examine the strength of FPC in the event of LIB sudden fire bust inside their enclosures. Although there is a safety venting valve built-in in any enclosure, it is common that these valves become faulty with passing time due to spring failure, or they were blocked by internal debris from the cooling management system inside the enclosure [17]. In the event of extreme LIB thermal runaway, some of the inevitable incidents such as short circuit, punch damage, or voltage overcharge and discharge, a simultaneous raise of pressure and temperature inside cells could occur.…”

Section: Thermal Tensile Testingmentioning

confidence: 99%

The Performance of Filava-Polysiloxane, Silres® H62C Composite in High Temperature Application

Bari¹,

Loganathan²

2021

J. Compos. Sci.

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The research aim is to investigate the performance of novel enriched mineral fibres (Filava) in polysiloxane SLIRES H62 resin. Specimens were manufactured using a vacuum bagging process and oven cured at 250 °C. Specimens were prepared for flexural testing according to BS EN ISO 14125:1998 to obtain flexural strength, modulus, and elongation. The mechanical strength was compared to similar composites, with the aim of determining composite performance index. The flexural modulus (9.7 GPa), flexural strength (83 MPa), and flexural strain (2.9%) were obtained from a three-point bending test. In addition, the study investigates the thermal properties of the composite using a state-of-art Zwick Roell high temperature tensile rig. The results showed Filava/Polysiloxane Composites had an ultimate tensile strength 400 MPa, Young’s modulus 16 GPa and strain 2.5% at 1000 °C, and no smoke and ash were observed during pyrolysis. Ongoing research is currently taking place to use Filava-H62 in fire-retardant enclosure for lithium-ferro-phosphate Batteries used in electric trucks.

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“…Experimental observation for determining spatial distribution of inclusion in matrix is challenging although it can be done through advance materials characterization techniques such as X-ray tomography. 43,44 As a solution of steering away from experimental observations, especially for statistical distribution, some form of continuous distribution of inclusions is usually assumed to determine the ETC of a composite. 42 The outer surfaces of a cube parallel to xy- and xz -planes are perfectly insulated, i.e., the direction of heat transfer is along x -axis.…”

Section: Theoretical Analysismentioning

confidence: 99%

Effective thermal conductivity of two-phase composites containing highly conductive inclusions

Khan

2016

Journal of Reinforced Plastics and Composites

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Thermal conductivity is one of the key material properties to understand the effective thermo-mechanical behavior of advanced composites. Experimental studies show that when highly conductive inclusions are embedded in a less thermally conductive matrix, the effective thermal conductivity of the composite changes drastically with the increase of volume fraction (V f ) of the inclusions. This study presents a theoretical model to predict the effective thermal conductivity of two-phase particulate composites containing highly conductive inclusions in a polymeric matrix. The probabilistic approach presented by Tsao (1961) has been modified and extended for predicting the effective thermal conductivity of two-phase composites. The expression for the effective thermal conductivity of a unit cube of two-phase composite is derived implicitly in terms of distribution function, V f and thermal conductivity of the constituents. Different distribution functions of the inclusions are proposed and the optimum function is obtained to describe the effective thermal conductivity of highly conductive particulate composites. Results of the effective thermal conductivity of a cubic unit cell obtained from different distributions of inclusions are compared with published experimental data, and other analytical and numerical models for particulate composites available in the literature. The results show a linear distribution of inclusions gives reasonable estimates of the effective thermal conductivity of the particulate composites. It is anticipated that the proposed approach can be used to develop models for the effective thermal conductivity of advanced composites containing highly conductive inclusions. KeywordsEffective thermal conductivity, two-phase composites, particulate composites, the distribution of inclusions, highly conductive composites composite changes significantly with the increase of volume fraction (V f ) of the inclusions. [3][4][5][6][7] Therefore, a precise prediction of the ETC of the highly conductive

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Measurement of thermal diffusivity for alumina borosilicate glass bearing TRISO fuel particles: experiment and modelling correlation

Cited by 10 publications

References 13 publications

Multi-scale 3D image-based modelling of a carbon/carbon composite

Multi-scale 3D image-based modelling of a carbon/carbon composite

The Performance of Filava-Polysiloxane, Silres® H62C Composite in High Temperature Application

Effective thermal conductivity of two-phase composites containing highly conductive inclusions

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