Center for Composite Materials - University of Delaware

Research Summary

An Experimental Technique to Characterize the Thermal Conductivity of Polymer Composites Using Infrared Camera

Authors: H. Yu (PhDME), A. Nonn (Intern), D. Heider and S. G. Advani

INTRODUCTION

Motivation
Low through-thickness thermal conductivity of typical composite materials
Measure and enhance the through-thickness thermal conductivity for composites
Objectives
Record the temperature gradient due to sample surface heterogeneity
Investigate the role of natural convective boundary condition influence on heat transfer efficiency

EXPERIMENTAL METHOD AND SETUP

Vertical implementation: prevention of asymmetric natural convection

SURFACE EMISSIVITY AND HEAT TRANSFER COEFFICIENT EVALUATION

Evaluate the thermal grease surface emissivity to acquire the real temperature based on infrared image reading

3D FINITE ELEMENT MODELING

VALIDATION TEST AND COMPOSITES TEST

Stainless steel sample test
Effective k calculation error <4%
Composites test

RESULTS

SUMMARY

An apparatus was modified to be integrated with infrared camera and FE modeling for a novel through-thickness thermal conductivity measurement technique with the capability to capture surface temperature unevenness.
Multiple copper rods distributed through the thickness enhance thermal conductivity significantly.

ACKNOWLEDGEMENTS

This work is supported by the National Science Foundation (CCMI-0970002).

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