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首页> 外文期刊>Journal of heat transfer: Transactions of the ASME >Thermal contact resistance of silicone rubber to AISI 304 contacts
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Thermal contact resistance of silicone rubber to AISI 304 contacts

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Elastomers are highly extensible, compliant, and easily processed into a variety shapes; other properties vary according to the specific constituents. Elastomers may deform easily to occupy cavities at an irregular metal surface-unlike metal tometal contacts, these interfaces may have more real contact area than apparent contact area. The typically low thermal conductivity and softness of elastomers, as compared with metals, often suggests that the total thermal resistance of ametal-elastomer-metal joint may be calculated using only the bulk thermal resistance of the elastomer, the interface resistances being neglected. For a thin elastomer layer or as additives increase its thermal conductivity, and as the bulk resistance ofthe elastomer thus decreases, the interface resistances may become significant. Existing contact resistance models (e.g., Cooper et al., 1969; Mikic, 1974; Sridhar and Yovanovich, 1994), developed for interfaces of two hard materials, are not applicableto elastomeric contacts because of the intrinsic properties of elastomers. Therefore, measurement of the thermal contact resistance (or its inverse, the contact conductance) for elastomeric interfaces is necessary.

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