File:MetalFatigue 006.jpg

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Description A cross section of a spring that failed in the NBS study shows a fatigue crack which developed along longitudinal planes in the wire. The section is some distance from the fracture. The study showed that initial fatigue failure of the compression springs occurs on longitudinal planes of mazimum shear stress in the wire. (1) The crach progresses for some distance along the wire before a crack normal to the tensile stress is started. (x 50). (2) Typical fracture of helical compression spring wound from music spring wire. Arrow A indicates plane of tensile fatigue cracks. Arrows from B indicate surface of longitudinal shear crack.
Source National Institute of Standards and Technology
Author National Institute of Standards and Technology
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This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

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Public domain
This image is in the public domain in the United States because it is a work of the United States Federal Government, specifically an employee of the National Institute of Standards and Technology, under the terms of Title 17, Chapter 1, Section 105 of the US Code.

English  日本語  македонски  Nederlands  +/−

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Date/TimeThumbnailDimensionsUserComment
current19:02, 6 March 2014Thumbnail for version as of 19:02, 6 March 20141,652 × 1,638 (129 KB)NISTResearchLibrary (talk | contribs)

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