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E-book Design of Cast Steel Components under Cyclic Loading
The consequences of material fatigue are some of the main causes of damage in load-bearingstructures. Thisappliestoapplicationsinmechanicalengineering, construction,the offshore industry and numerous other fields. In order to counter these problems, newmanufacturing processes are continuously being tested and new materials and joiningmethods are being developed in order to generate more powerful and consequently,more resource-efficient structures. With the same objective, an increasingly deeperunderstanding of the physical processes responsible for fatigue is being achieved andmodelling and calculation approaches derived in countless research projects on differentobservational scales.Casting is one of the oldest metal manufacturing methods and enables the creation ofalmost any geometric shape. By adapting the shape to the flow of forces, potentialscan be exploited as they relate to fatigue-optimized structures. Nevertheless, theapplication of cast steel components lags significantly behind expectations. Apartfrom several technical advantages, no economic concessions must be made [70]. Thechallenges are casting defects occurring in any economical casted component, whoseinfluence on the fatigue strength can hardly yet be quantified in the design process. Dueto the lack of specific design methods, it has not been possible to develop a generallyvalid normative basis so that the application of castings is limited to representative objects. In order to exploit the full potential of cast steel and to make the design of efficientstructures accessible to a wide range of users, the scope of this work is to derive a directlink between fatigue strength and the quality requirements for cast steel components.
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