On the Radio-Frequency Inputs in Dipolar Heating of Adhesives
NORTH CAROLINA STATE UNIV AT RALEIGH CENTER FOR RESEARCH IN SCIENTIFIC COMPUTATION
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We consider the form of the radio-frequency RF or dielectric input expression in the heat equation which arises in the modeling of the curing of epoxy adhesives in bonding of composites. We review two standard derivations of a commonly used expression for the RF heating source term. In this context we discuss difficulties involving the associated inherent polarization assumption and asymptotic behavior of dielectric parameters as a function of the frequency of the RF signal. These difficulties cast doubt on the validity of the standard RF expression. We the use two standard polarization models Debye and Lorentz to demonstrate how one can systematically derive general RF heating expressions which do not suffer the inconsistencies that arise in the standard RF expression.
- Laminates and Composite Materials
- Electricity and Magnetism
- Radiofrequency Wave Propagation