Fatigue analysis of threaded connections using the local strain approach

摘要: Abstract The fatigue assessment of bolts and bolted joints is done using nominal approach, for example the German VDI guideline 2230 . For threaded components, approach therefore no more applicable. calculation strength connections according to FKM “Analytical machine components” does not lead satisfying solutions. So far, there procedure general connections. Based on mechanics local strain paper shows a components Prediction results are compared own experimental data from tested bolt nut in different sizes, categories subjected high low mean stress. A simple model describe cyclic creep as function stress amplitude developed. Furthermore phenomena related transferability (size, gradients, multiaxiality, crack growth) discussed.