A structure can become unstable when a load reaches its buckling value or when nonlinear material becomes unstable. It is possible to observe the full response of a structure under proportional (ramped) loads using elastic-plastic analysis in ANSYS, so the plastic limit load and the location of plastic hinges can be determined. In this post, … Continue reading Plastic limit analysis of a statically indeterminate beam
General
A comparison between ANSYS Mechanical and Simulation in SolidWorks
A Comparison between ANSYS Mechanical and SolidWorks Simulation
The large deformation analysis of a hyperelastic tensile test sample
This example shows the static analysis of a tensile test sample made of rubber. The dimensions of the sample are shown in the following figure. The thickness of the sample is 1.5mm. Using the symmetry, only 1/8 of the sample is analyzed. After solving the 1/8 model, the results of the full model can be … Continue reading The large deformation analysis of a hyperelastic tensile test sample
Contact Analysis of a Pipe-clamp Assembly
We have discussed multiple examples of contact analysis so far. In this post, we are going to investigate a pipe-clamp assembly. By using a pretensioned bolt, the clamp holds the pipe firmly (see the following figure). If the pretension is insufficient, slipping would happen between the pipe and clamp. If the pretension is too large, … Continue reading Contact Analysis of a Pipe-clamp Assembly
The stress and deformation analysis of a rubber O ring
In this post, we are going to analyze the stress and deformation of a rubber O ring as shown in the following figure. The rubber O ring is often used for sealing purposes. It may be under large pressure and its deformation is constrained by the sealing groove. Due to the large difference in the … Continue reading The stress and deformation analysis of a rubber O ring
Harmonic analysis: A steel disk example
Harmonic analysis is used to determine the steady-state response of a linear structure to loads that vary sinusoidally (harmonically) with time, thus enabling you to verify whether or not your designs will successfully overcome resonance, fatigue, and other harmful effects of forced vibrations. This analysis technique calculates only the steady-state, forced vibrations of a structure. … Continue reading Harmonic analysis: A steel disk example
Examples of 3D Mapped Meshing
In the last post, some examples of 2D mapped meshing are given. Here we are going to look at some examples of 3D mapped meshing. Similar to 2D mapped meshing, the strategy is straightforward: divide the domain in such a way that all the subdomains meet certain requirements, specify the element size or the number … Continue reading Examples of 3D Mapped Meshing
Examples of 2D Mapped Meshing
Some techniques in 2D mapped meshing
Large Lateral Deflection of Unequal Stiffness Springs
A two-spring system is subjected to a force F as shown below. l=10 cm, k1=8N/cm, and k2=1N/cm. F=5*2^0.5N. Determine the strain energy of the system and the displacements δx and δy. The solution to this problem is best obtained by adding mass and using the "slow dynamics" technique with approximately critical damping. Combination elements (COMBIN40) are … Continue reading Large Lateral Deflection of Unequal Stiffness Springs
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
