Compression Spring Fatigue

An explanation on why spring specifications set maximum allowed stress far below the material yield point or stress limit. How to predict compression spring cycle life. How to calculate compression spring failure due to fatigue. Compare spring cycle times from one thousand to one million cycles. Plastic and elastic deformation. Reduction in maximum allowable material stress due to dynamic loading. This video is part of a playlist detailing how to design compression springs.

Stress amplitude, stress magnitude, one test cycle, shift stress, yield stress, maximum operating stress, plastic deformation, stress concentration or concentrator.