Rotor core punching Rotating machinery can withstand significant centrifugal force during operation. Therefore, the strength of a rotor punching should be analyzed. This problem was solved using Workbench. Considering the periodicity of the rotor punching and load, a 1/8 model was created and cyclic symmetric boundaries were defined. The model consists of a rotor punching … Continue reading Analysis of the strength of rotor punching under centrifugal force
symmetric boundary
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
Wear analysis of casing coupling
Fig.1. Typical casing couplings Because the reciprocating and rotary motion of the drill pipe in the casing is eccentric, the radial and axial friction between the drill pipe and the casing causes serious wear on the outer surface of the drill pipe and the inner surface of the casing. This wear mostly occurs at the … Continue reading Wear analysis of casing coupling
Xutao Sun 