ermüdungslebensdaueranalyse

Ermüdungslebensdaueranalyse is a method used in engineering to predict the fatigue life of a material or component under cyclic loading. Fatigue is a phenomenon where materials fail after repeated application of stress, even if the stress is below the material's yield strength. The analysis aims to determine how many load cycles a component can withstand before failure occurs, or conversely, to design components that can survive a specified number of cycles.

The process typically involves understanding the stress history the component will experience, identifying the material properties related to fatigue, and then applying established models or simulation techniques. Key parameters include the stress amplitude, mean stress, and the material's S-N curve (stress-life curve) or its fatigue crack growth properties. The S-N curve relates the applied stress range to the number of cycles to failure for a given material.

Several approaches exist for fatigue life analysis. The stress-life (S-N) approach is often used for high-cycle fatigue, where the number of cycles to failure is large and the plastic deformation is minimal. The strain-life (ε-N) approach is more suitable for low-cycle fatigue, where significant plastic deformation occurs. Fracture mechanics approaches are employed to analyze the propagation of existing cracks, predicting the life remaining until a critical crack size is reached.

Accurate ermüdungslebensdaueranalyse is crucial for ensuring the safety and reliability of structures and machines in various industries, including aerospace, automotive, and civil engineering. It helps in preventing catastrophic failures and optimizing design for longevity and cost-effectiveness.