Where n 3 and e 78 x 10-12s when s 28 mpa the bolt is


A steel bolt has a modulus of 207 GPa. It holds two rigid plates together at a high temperature under conditions where the creep of the steel is described by the equation:

ε· = ε·0(σ/σo)Π
where n = 3, and ε· = 7.8 x 10-12/s, when σ = 28 MPa. The bolt is initially tightened to a stress of 69 MPa. What is the stress in it after 1 year?

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Mechanical Engineering: Where n 3 and e 78 x 10-12s when s 28 mpa the bolt is
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