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Bolt preloading vs. temperature

  1. Oct 11, 2011 #1
    Using a gasket in a bolt connection; does the thickness of the gasket influence the preload of the bolt when the temperature changes?

    Since the thermal expansion is length/length/temperature the thickness does not influence, what am I missing here? My current assumption is this:
    ΔF_bolt = ΔT(α_gasket*E_gasket*A_gasket - α_bolt*E_bolt*A_bolt)

    What I have is a steel bolt connection with a gasket of a different material (i.e. stiffness and thermal expansion is different). The bolt is preloaded and the subject to a temperature increase.

  2. jcsd
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