Simultaneous Stress and Environmental Exposures

FIGURE 7. Standard lap-shear in bending. Time to failure is recorded. (From Reference 25.) 

Eichhom et has performed stress testing on stainless steel overlap joints with 

Attempts have been made to take the survival time data from constant-stress testing of lap joints and combine them with reaction rate theory, as it concerns polymer mechanical behavior, and predict long-time joint durability. From this, McAbee and Levi(i70,m) developed different reaction rate equations for three decreasing relative humidity situations, but only under the 90-96% RH conditions was there any apparent success in predicting failure times. 

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