![]() ![]() The present-day study and application of fatigue strength are expansive, as the tolerance for failure becomes smaller and design criteria become more stringent. However, a proper understanding of the mechanism of failure due to fatigue was not understood until the 20 th century, with many engineers and scientists building upon the earlier observations and tests of railway engineer August Wöhler. įatigue has been recognised as a problem since the early 1800s, where catastrophic failures were recorded in metallic components of machines, infrastructure and constructions, predominantly bridges and railroads. Therefore, fatigue is an important parameter to consider for moving mechanical components that are expected to last for long periods. It’s estimated that about 90% of mechanical failures of materials in service are caused by or at least contributed to by fatigue. ![]() Materials have been known to fail in service under repetitive stresses that are much lower than their tensile strength. ![]()
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March 2023
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