Fig.1 Typical glass curtain walls Some assumptions and simplifications in this problem: Elastic materials Cables are modeled using LINK10 elements with the tension-only option Trusses are modeled using BEAM44 (or BEAM188) elements The glass wall is modeled using SHELL63 elements. Wind load distributes evenly on the surface. The aim of this problem is to calculate … Continue reading Non-linear analysis of a point-fixed glass curtain wall cable-truss structure
Steel
Contact analysis: a bolted flange connection
A typical bolted flange connection (see Fig.1) is modeled in this example. Fig.1. The geometry of the model. Only the 1/4 model is created due to symmetry. The challenges in this example are as follows: Complicated geometry. Applying pretension to bolts. Multiple load steps. Modeling contact. It is worth mentioning that a special element Prentension179 … Continue reading Contact analysis: a bolted flange connection
Torsional limit analysis of a container
Fig.1. A typical container This problem is to analyze the torsional limit of an open container (without lid). It is a typical problem in structural nonlinear buckling analysis. As an alternative to the Newton-Raphson method, the arc-length method will be used. Fig.2. A simplified model of the container body Some assumptions and simplifications in this … Continue reading Torsional limit analysis of a container
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
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
Xutao Sun 