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Fatigue (material)
weakening of a material caused by repeatedly applied loads / From Wikipedia, the free encyclopedia
When a material starts to become weakened, because of heavy use, this is known as material fatigue. As an example, a screw may be able to hold an object that weights a metric ton. When it is used for an object that weights only 100 kilograms (220 lb) one hundred times it may start to wear out and show signs of fatigue.
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