Finite

There are a lot of interesting examples in the RADIOSS example, so I'll be working through them for a while. In this post, I'll going to perform a Pendulums example. There was also an example file in HyperMesh's installation path. However, due to the different versions, the example in the previous post was slightly different. In this example, we're dealing with a gravitational contact with no lo..

In previous post, I post S-beam crash from the RADIOSS guide but I think lack in this case study, so I'll execute this S-beam crash case. In guide, write this simulation iteration information First, hourglass is described in the radioss guide as follows. Hourglass modes are element distortions that have zero strain energy. The 4 node shell element has 12 translational modes, in this modes has 3 ..

In this post, I will perform an S-Beam Crash, an example from the RADIOSS guide. The description of RADIOSS is as follows An S-beam is crushed at an initial rate of 5 m/s against a rigid wall. The section is an empty square-shaped tube (each side measuring 80 mm). The thickness is 1.5 mm. The tube is made of steel, and plasticity is considered, but not failure. Material Properties Young's modulu..

Impact analysis or crash analysis is the process of studying the response of an object or structure to a collision or impact. Understand and predict the forces, deformations, and extent of damage that occur during a collision with impact analysis. Evaluate the accuracy of the results by comparing the Impact analysis with the actual crash experiment. Why do we need conflict resolution? 1.Ensure s..

Contact analysis is a numerical method used to understand and predict physical phenomena that occur when two or more objects contact or interact with each other. When objects come into contact with each other, they transfer forces to each other. This force exerts pressure on the touching surfaces and, in some cases, creates friction. The purpose of contact analysis is to understand how these pre..

I didn't finish the previous post because I felt like needed to study more about mechanical vibration. In fact, it's still obviously not perfect, but I'm going to use what I've learned, so there will be some errors. In the previous post, I mistakenly wrote the formula for the first natural frequency as a circle. First natural frequency formula for beam is where $L$ is length, $E$ is young's modu..

Modal analysis is a method for analyzing the vibration characteristics of a system. Modal analysis can reveal important characteristics of a system, such as natural frequencies and mode shapes. With this information, it is important to predict whether the structure is resonant and how it will deform under vibration. where $m$ is mass, $c$ is damping coefficient, $k$ is spring constant, $x(t)$ is..

In the previous post, I used HyperMesh to perform buckling analyses, calculate analytic solutions, and compare them. In this post, I'll use COMSOL to solve the same problem. I'm actually more familiar with HyperMesh than COMSOL, so my method may not be correct and there may be a better way. I use COMSOL Multiphysics 6.0 version Run COMSOL - 2D - Beam - Add - Study Preset Studies for Selected Phy..

Buckling is important concept in stuctural engineering. A material or structure that deforms or failure under compressive forces. Buckling is most commonly observed in slender and long structural element like columns or beams, which bend or curve outward when unable to withstand the applied compressive forces. First, compute the analytic solution. where $n$ is mode number, $E$ is Young's modulus..

Torsional analysis is a very important aspect of structural and mechanical engineering. The main purpose of this analysis is to understand and predict how a structure or mechanical part will respond to a torsional force or torque. In this example, compare the torsional stiffness and rotation angle of a shell element with node sharing versus spot welding. E = 207GPa, v = 0.327 T = 250 kNmm If clo..