These tests are used either to generate fatigue life and crack growth data identify critical locations or demonstrate the safety of a structure that may be susceptible to fatigue. He also introduced the practice of supporting one end of a bridge on roller bearings to allow for thermal expansion. Wohler rotating fatigue test there are many mechanisms that can lead to failure but fatigue is perhaps one of the most insidious since it can lead to a catastrophic failure with little or no warning one well known example being the failure of the comet aircraft in the 1950s.
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