This is described by the research loop in Fig. If the agreement is insufficient the criterion needs to be replaced or altered. A criterion is applied to HCF results and the agreement between the tests and the criterion is analysed. Firstly, it will be used to evaluate criteria. The paper is concluded with a discussion on current and future uses of FAST.įAST is intended to be used as described in Fig. This paper gives an overview of the ideas behind FAST, followed by a closer description and an example of how it can be used to evaluate and develop criteria. The values of the computed fatigue criteria are imported into the Abaqus results file and are thereby easily viewed on screen with commercial post-processors. Data needed for the computation of criteria, such as stress and geometry, are extracted from the Abaqus results file. FAST is designed to interact with the Abaqus finite element code. Secondly, when a satisfactory fatigue design method exists, FAST will be used as a fatigue post-processor for design. Firstly, it is a test bench for fatigue criteria and fatigue design methodology.
This means that these post-processors are unsuitable to evaluate a broad range of fatigue criteria, and it is difficult, or impossible, to use them for criteria development.įAST (Fatigue AnalysiS Tool), the post-processor that was developed in the present work has dual purposes. However, they have some disadvantages they exclusively work with a given set of criteria, which often are of only one type. There exists a number of commercial fatigue post-processors capable of such analyses. The only feasible way to do this for a complex component is to base the fatigue strength evaluation on FEM results. It is crucial that a reliable fatigue assessment can be performed at an early stage in the design process, i.e. One of the most critical issues regarding product functionality and optimal design is the fatigue strength.
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