Thermal conductivity in practical composite laminates: degree thesis
Mishra, Ram Babu (2012)
Mishra, Ram Babu
Arcada - Nylands svenska yrkeshögskola
2012
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Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi:amk-2012090513417
https://urn.fi/URN:NBN:fi:amk-2012090513417
Tiivistelmä
This thesis investigates thermal resistance of composite materials containing fibre, resin and voids. First, the mathematical model was derived based on statistics that describes the thermal resistance of a composite made of three constituents, represented by equation number (2.10). Secondly, the derived model was applied to study two distinct practical cases. The derived equations in this thesis work that illustrate the change in relative ther-mal resistance for:-
a) Constant volume equation (2.13)
b) Non-constant volume equation (2.16)
The results demonstrated that a vinyl ester, glass fibre laminate will increase its thermal resistance by 2.13% for every 1% increase in void volume fraction. Within the frame work of this thesis an experimental verification was done on foam specimen. The ex-periment used a heat flux meter and the results differ with 14.77% of the expected value. This means that the result can only be trusted with an error margin of 14.77%.
a) Constant volume equation (2.13)
b) Non-constant volume equation (2.16)
The results demonstrated that a vinyl ester, glass fibre laminate will increase its thermal resistance by 2.13% for every 1% increase in void volume fraction. Within the frame work of this thesis an experimental verification was done on foam specimen. The ex-periment used a heat flux meter and the results differ with 14.77% of the expected value. This means that the result can only be trusted with an error margin of 14.77%.