Nonlinear supports in FEA: Gap Elements (NX Nastran) [Q&A #2]

By | September 12th, 2017|FEA: Intermediate, • Boundary Conditions, • Contact, FEA Topics:, Q&A, FEMAP|

Recently I got a great question from Ardalan (thanks for writing mate!) about defining nonlinear supports in FEA. I think he does a better job of defining the problem: First how to constraint an entity with in tolerance rather than completely fixing it? i.e. how to define a certain range of motion for an entity [...]

Finite Element Analysis workflow

By | May 2nd, 2017|• Linear Analysis, FEA: Basics, • Meshing, • Boundary Conditions, • Post Processing, FEA Topics:, RFEM, FEMAP|

When I first started working with Finite Element Analysis (FEA) I had a huge problem in understanding what to do. I had a basic engineering knowledge but I simply did not understand what was the order of the steps. Suddenly the software had many "modules" and each was screaming at me that some data is [...]

Boundary conditions influence on static design – case study

By | March 20th, 2017|FEA: Intermediate, • Boundary Conditions, FEA Topics:, Case Studies, FEMAP|

Each day we do simplifications to boundary conditions just to reduce time spent on analysis. We are all aware, that structured support is crucial, but the actual influence of the proper boundary conditions is rarely examined. See yourself how drastic influence BC have on your design! I will discuss this using a project I just [...]

Design your silos with FEA – it pays!

By | February 28th, 2017|• Structural Steel, • Nonlinear Analysis, • Stability, FEA: Intermediate, • Post Processing, FEA Topics:, Case Studies, Structural Design Topics:, FEMAP|

Designing steel silos with analytical approach always yields very conservative results. Nonlinear Finite Element Method allow for great optimization of those structures (and other shell structures as well!). I will discuss this based on a silo I have recently designed. […]

Imperfections in buckling design

By | January 31st, 2017|• Nonlinear Analysis, • Stability, FEA: Intermediate, FEA: Advanced, FEA Topics:, Structural Design Topics:, FEMAP|

Using deformations from linear buckling as imperfections in nonlinear buckling case is the most common approach. I will use a simple example to prove that this is not always the best idea. Proper selection of imperfections is a very complicated process – I hope to shed some light on this matter. […]

Linear vs nonlinear buckling explained!

By | January 24th, 2017|• Linear Analysis, • Nonlinear Analysis, FEA: Intermediate, • Linear Buckling, FEA Topics:, FEMAP|

Choosing between linear buckling and nonlinear buckling in given case can be difficult. Both approaches have positive and negative aspects. I explain here what are the differences, and when to use each analysis. I promise not to use complicated mathematics, nor highly theoretical approach. Instead, I will use a simple example to easily describe differences. [...]

Nonlinear buckling explained simply

By | January 10th, 2017|• Nonlinear Analysis, • Stability, FEA: Intermediate, FEA Topics:, Structural Design Topics:, FEMAP|

Nonlinear buckling is a really interesting analysis. It gives you enormous possibilities, at only a few minutes worth of work. At the start, it might be frustrating to set it up (there is a learning curve involved), but in the end, it is a default engineering tool for me right now! Possibilities are limitless! [...]

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