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
The Analysis of Piston Rubber Film of Pneumatic Brake Device
Fig.1. Typical piston rubber films (with central hole) Fig.2. A typical piston rubber film Fig.3. A typical piston rubber film (edge can be fixed with bolts) Typical piston rubber films in a pneumatic brake device that is commonly used in drilling operations are shown in Fig.1-Fig.3. When the brake device is activated, the piston rubber … Continue reading The Analysis of Piston Rubber Film of Pneumatic Brake Device
The stress-strain curve of rubber material stiffened by carbon fiber
Fig.1. Illustration of the discretization and BCs A 2D model is created. Plane elements and beam elements are used to discretize rubber material and carbon fiber, respectively. To ensure that rubber and carbon fiber deform together (no slipping), plane elements and beam elements share common nodes. A concentrated force (the red arrow in Fig.1) is … Continue reading The stress-strain curve of rubber material stiffened by carbon fiber
The stress analysis of curved casing
The outer diameter of the casing is 177.8mm, and the thickness of the casing is 13.72mm. The steel grade of the casing is N80. The yield strength is 551.6MPa. Poisson's ratio is 0.3. The elastic modulus is 2.06GPa. The curvature of the casing is 6degrees/100m. Perform 3D analysis using SOLID95 elements. FINISH /CLEAR !***************************** !units: … Continue reading The stress analysis of curved casing
The stress analysis of eccentric-wear casing
Fig. 1. As shown in Fig.1, the outer ring is the casing, and the middle is the drill pipe. The unworn part of the casing is going to be analyzed. The diameter of the drill pipe is 127mm. the outer diameter of the casing is 177.8mm, and the thickness of the casing is 13.72mm. The … Continue reading The stress analysis of eccentric-wear casing
About me and the website
Hi, welcome to this website ：） I am Xutao Sun, currently working as a Lecturer of Mechanical Engineering at the University of Waikato, New Zealand. My research focuses on Structural Health Monitoring (SHM) using vibration-based methods. My broader interests include Mechanical and Structural Engineering, the Finite Element Method (FEM), and Computational Fluid Dynamics (CFD). This … Continue reading About me and the website
Xutao Sun 