Fatigue growth

Fig. 3. Fatigue growth rate properties of stainless steel base metals and weldments at 4 K.

Rubber modifier is characterized by a slow rate of fatigue growth under external cyclic loads as well as high energy of new surface significantly exceeding (by tens or hundreds times) of bitumen surface energy y. ... 

The second process is fatigue growth of stopped crack from the length of a = = 0.5z a length a = Assuming that... 

Fatigue tests on unnotched samples have demonstrated that the fatigue strength (the stress corresponding to failure at a given number of cycles) is reduced by as much as 30% when nylon-6,6 is equilibrated at 50% rh (152) (see Fig. 34). In marked contrast, it has been found that fatigue growth rates in nylon-6,6 exhibit a pronoimced minimum at an absorbed moisture content of 2.6 wt% water, and... 

Corrosion has been the major factor causing joint failure in the aerospace industry and this is still an issue facing potential industrial and automotive users, particularly if metals such as steel or copper are used [20]. Researchers based in Japan [21] showed that acid treatment of steel does not improve the fracture toughness of bonds with toughened epoxies, but it does increase the fatigue growth... 

Fig. 1.69 Fatigue growth regimes of MSC and macro crack relative to life fraction N/Nf...

Krueger, R., 2011. Development and Application of Benchmark Examples for Mode II Static Delamination Propagation and Fatigue Growth Predictions. Report Prepared for NASA, NASA/CR-2011-217305, Hampton, Virginia. 

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