Abstract
Almost any machine part is dynamically loaded and fails in most cases by fatigue. Nevertheless many authors recommend just a static shape optimization based on the minimization of maximum stress to improve the lifetime. In this paper a more detailed description of fatigue within continuum damage mechanics (CDM) considering the loading history is introduced. On this basis, two new cost functions are determined for shape optimization of dynamically loaded machine parts. An optimization procedure is built up using the methods of mathematical programming (MP). The optimized parts show a remarkably increased lifetime in numerical results as well as in experiments.
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