I was trying to find out what Global Buckling is, and someone defined it as: "Global buckling is classical Euler buckling. This has to do with the “global” cross-section properties (EI) and the beam/column unbraced length “L”."
I understand Euler Buckling load can be found with the help of...
If for example the homogenous material is not subjected to any load, deformation or anything. While the nonhomogeneous material is subjected to gravity,and every other type of force you could imagine. How would the strain tensor differ for the two cases? Would it all just be zero for the...
I am reading a paper related to microstructures, and it says a unit cell has geometric cubic symmetry. When I tried to google the meaning it said: "The symmetry group of a cube is isomorphic to S4, the permutation group on 4 elements." Which tells me basically nothing as this is not my field...
The first three mean stress in the first, second and third direction, for example in the x, y and z direction:
What would the last three numbers mean -(23,32) , (13,31) , (12,21)? I understand that they represent shear, but how does it work with directions? Are there any good illustrations...
This is how a paper describes it:
Is this what they are talking about? I found this youtube video seperately, I am not sure if what is illustrated below is the same as the text above talks about.
https://www.youtube.com/watch?v=j4IaRcUM0Mk
I have been given a model that is used to model a unit cell representing a large repetitive structure by using "Cell periodicity function" - which calculates the effective material properties of said structure.
Error message I get if "parametric sweep" function is turned off.
Boundary...
I am going to model this in a FEM programme (COMSOL), and for computational reasons the symmetry is fully exploited. Picture 1 is a cubic lattice structure, its supposed to be a small part of a major repetitive structure. Picture 2 is picture 1 even further simplified (imagine picture 1 being...
I am going to model this in a FEM programme (COMSOL), and for computational reasons the symmetry is fully exploited. Picture 1 is a cubic lattice structure, its supposed to be a small part of a major repetitive structure. Picture 2 is picture 1 even further simplified (imagine picture 1 being...
Does anyone understand how Floquet-Bloch boundary conditions work in this context? Seems like Bloch-Floquet boundary conditions can do anything? Would it be possible to explain in layman's terms how it works? I have spent hours trying to read up on it but still cant figure it out.
Does anyone understand how Floquet-Bloch boundary conditions work in this context? Seems like Bloch-Floquet boundary conditions can do anything? Would it be possible to explain in layman's terms how it works? I have spent hours trying to read up on it but still cant figure it out.
Is there anything interesting (and not too difficult) in structural engineering that we could use finite element method to analyze?
Preferebly using the commercial finite element software Abaqus.
I am working on a grouted joint in offshore wind turbines, and I have been given load history which consists of loads and moments in the XYZ direction which change with time (both in magnitude and direction) to be applied to this model.
Cross section of a grouted joint in offshore wind turbine...
My assembly consists of inner steel part, outer steel part and concrete cylindrical part in the middle. I want to make contact between the different parts, so far I have assigned predefined field to make the inner steel part expand outwards, and outer steel part expand inwards (figure 3). I was...
Say I have two cylindrical surfaces in contact (in reality there are three) and I am using surface-to-surface, penalty method and hard contact:
The cylinders are sticking, but when I check maximum penetration I see that it comes to 4.5e-09 m. Meaning there is very small amount of penetration...
I have to calibrate the penalty stiffness using convergence of maximum compressive and tensile stress in the grout.
I am working with a grouted joint model, which consists of three hollow cylindrical models as shown below:
I have trouble understanding how penalty stiffness relates to the...
I have three cylinder; inner steel part, middle concrete part, and outer steel part. I want to do a convergence study on the concrete cylinder in the middle (in red). What loads should I apply to the model and what output should I check the convergence for? I was thinking of applying normal...
I have two steel cylinders which I made sure penetrate each other slightly, and then I tried slave adjustment to get proper contact, however this does not give full contact, only some parts are sticking and sliding while most of the area is open. I have no load, BC's, the step is dynamic...
I am trying to get proper contact using surf-to-surf and finite sliding. I am in dynamic, implicit step. Below you can see how my contact is done. I have tried in the first step fixing the inner cylindrical concrete part and the outer steel cyliner part, while applying small amount of gravity...
