FAILURE CONSIDERATIONS P4

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FAILURE CONSIDERATIONS P4

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where tt = time of exposure at the rth combination of stress level and temperature L1 = time required to produce creep strain 8D if entire exposure were held constant at the /th combination of stress level and temperature Stress rupture may also be predicted by (18.78) if the L1 values correspond to stress rupture. This prediction technique gives relatively accurate results if the creep deformation is dominated by stage II steady-state creep behavior. Under other circumstances the method may yield predictions that are seriously in error. ...

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