Bracelet stretch

[Colnago]

Originally Posted by Sunshine

Yes that makes good since! My reference comes from testing I performed working for Seimens. We designed testing equipment that would cyclically load parts from our turbine in a simulator. The simulator would replicate vibration and record the cycle’s parts would see prior to showing fatigue. Even within their range of elasticity the longer the parts stayed in the simulator the weaker they become over time. After various intervals of simulated testing we would perform a destructive test to see if the tensile and yield strength remained the same. About 30% of the parts would show failure sooner than the parts tested without undergoing ware simulation test.

Thank You for your response.

P.S. Are you sure your not my boss?? Brian??

Yes it's Brian....your sacked!!!

Just kidding.....I would imagine that has something to do with work hardening caused by the cyclic loading, rather than "necking down" of the material..