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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...

This is a FEA buckling problem, and I am not sure what is meant by stress stiffness matrix and elemental stress stiffness matrix?

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 think I get it now, by operations of symmetry a cube can be built from the highlighted figure in (c).

Honestly, no

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...

Is this somehow related to using small angle approximation (sin θ ≈ θ)?

What is small deformation assumption in this text? LB analysis = Linear Buckling analysis

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

And is it in any way similar to slave/master surface in abaqus?

Is there anywhere I can check what the source and destination are defined as?

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...

FEA way I have attached what I found under Fixed Constraint, tried to place it around the model but didnt seem to help much. engineering_patrol, do I need livelink Matlab to see this stiffness matrix?

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...