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Compression Spring Stress Cycles to Failure Smile
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Posted by: markg ®

07/08/2004, 11:34:40

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I have a .016" compression spring that I am compressing to its solid height. At its solid height its shear stress is 150,000 psi or about 50% of its ultimate strength and 65% of its yield strength. Does anyone know how to calculate the number of cycles to failure (1,000, 10,000, 100,000)?






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Re: Compression Spring Stress Cycles to Failure
Re: Compression Spring Stress Cycles to Failure -- markg Post Reply Top of thread Forum
Posted by: drober ®

08/04/2004, 18:11:09

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If you go to the following link at xxxxx (no links) you will find out how to determine if the spring will last "forever" or not.  I made these calculations on a spring and found the R value to be -.25 but had the spring manufacturer (Century Spring) tell me that the spring will last 10,000 to 100,000 cycles.  So, it is not below the Soderberg line but still has a long life.  A shear strength of 150 ksi sounds very high, very high strength steels can also be brittle.        






Modified by Administrator at Wed, Aug 04, 2004, 20:42:12

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