Fatigue is one of the most important failure mechanisms in mechanical and structural engineering. A component may appear safe under a conventional static strength assessment, yet still fail after repeated loading and unloading. This is because fatigue damage accumulates gradually over time, often under stress levels much lower than the material’s static strength limit. Figure … Continue reading Introduction to Fatigue Analysis in Ansys Mechanical
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2D Stationary Crack Analysis: J-integral and Stress Intensity Factor Calculation
We talked about calculating J-integral and K1 using XFEM in the last post. XFEM is a powerful method as it eliminates the need to remesh crack-tip regions. However, there are some limitations. For example, material behaviour is assumed to be linearly elastic. The available fracture criteria are valid only for cracks in homogeneous linear elastic … Continue reading 2D Stationary Crack Analysis: J-integral and Stress Intensity Factor Calculation
XFEM-Based Stationary Crack Analysis
This post presents an example of stationary crack analysis based on the extended FEM (XFEM). A common way to model the stress concentration at a crack tip is using KSCON command which specifies a keypoint about which an area mesh will be skewed. For stationary crack analysis, reasonable accuracy can be achieved using KSCON, although … Continue reading XFEM-Based Stationary Crack Analysis
Xutao Sun 