FEA Design Tips #003

It's high time to make another one of those : ) I recently got caught up with some urgent designs, and those required revisiting some stuff I did several years ago... but I think I will feature this in future advice! Let's go with the tips! Pssst - there is also a video with those [...]

FEA Design Tips #003

FEA Design Tips #002

Wow... it's the next week already O.o This means that it's another roundup post! I will always be a week behind on what we talk about in the Facebook group (even more reason to join it!). This is on purpose - I simply want to get all the insight and those awesome discussions that happen! This [...]

FEA Design Tips #002

Nonlinear geometry benchmark

During last week I've posted a tip in the FEA Guild about using Benchmarks. Some great pointers were in the comments, but one got my attention the most: While there is no chance that I will build such database myself, I'm pretty sure we have a chance of making one together! I will try to [...]

Nonlinear geometry benchmark

Solve issues with nonlinear analysis convergence!

Lately, I got several emails with questions about nonlinear analysis convergence. There are a lot of reasons why your analysis could not converge. One of them is a wrong loads/increment strategy which I call "steering". Take a look at what are the possible options and what are the positive/negative aspects of each approach. Steering have [...]

Solve issues with nonlinear analysis convergence!

4 main nonlinear material models – NX Nastran version

I literally run this blog for posts like this one. Recently a friend challenged me to do something in Nastran. At a certain point, I realized that I know too little about nonlinear material types in NX Nastran and I suspect this is why I have convergence problems in my task. So as typical me, [...]

4 main nonlinear material models – NX Nastran version

Imperfections in buckling design

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. […]

Imperfections in buckling design

How to interpret outcomes from MNA

In this post I present a method allowing to read an outcome from a rising stability path obtained from MNA. This method is called “modified Southwell plot” and was published by prof. Rotter. If you ever had problems in estimating plastic capacity this is a must-read! […]

How to interpret outcomes from MNA

Nonlinear analysis setup – Steering

As I wrote previously in many cases nonlinear analysis of buckling yield better results than linear buckling. Setting up an analysis like that however requires certain knowledge. Today I will discuss steering of numerical analysis that is crucial in proper task definition. […]

Nonlinear analysis setup – Steering

Common mistakes in nonlinear analysis

Today I wish to discuss what things can influence the outcome of  stability path method in a negative way. As I wrote before, stability path is a tool, that uses outcomes from analysis steps (or increments) you have defined and computed for a given model. By itself it only presents results in a certain way [...]

Common mistakes in nonlinear analysis
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