Linear FEA in stress design!

March 9th, 2021|

My FEA history started pretty weirdly. I would guess that most folk start with linear FEA, while my first analysis was a nonlinear snap-through problem in shell buckling. Of course, I failed miserably for a very long time, before getting anything useful! Luckily for me, in the meantime, I started my first company. This meant [...]

Web under local loads – Lessons learned

February 22nd, 2021|

In the last few posts, I described how I would deal with the problem of local loading in the web of a relatively high strength steel girder. This is a "fun problem" from an engineering standpoint, and I hope you learned something from those articles. However, the "real" reason I did all that is to [...]

Web under local loads – Nonlinear FEA

February 8th, 2021|

This is the next post in the "design approach" series. This time, I'm going to solve the web under local loads using nonlinear FEA, so this should be fun! Nonlinear FEA is a super powerful tool, that allows you to calculate things very accurately. But I have no doubt, that the effort of running it [...]

Web under local loads – Linear FEA

January 25th, 2021|

In the previous post, we solved a rather interesting case of local loading in webs. We did those calculations by hand, following the procedure of EN 1993-1-5. While I really like hand calculations, it's obvious that you can't hope for a code procedure for every possible case... When there are no clear guides on how [...]

Web under local loads – Hand calculations

January 11th, 2021|

This is a new idea I have been working on, to show what is cool about design by hand, linear FEA, and nonlinear FEA, and I will demonstrate with several examples. I will solve each of them using all 3 approaches, then I will compare the outcomes, so we can discuss which method is useful [...]

What every engineer needs to know about FEA

November 9th, 2020|

I remember feeling overwhelmed when I started to learn FEA! It's just too much to deal with at once! Gathering my experience from running an FEA design company I will do my best to share with you, the most important aspects that you really should know about. There are a lot of things you can [...]

Buckling length of a column with a variable cross-section

August 31st, 2020|

We all know (or so I hope!) the basics of buckling. You know, the classical buckling lengths in a non-sway structure, etc. However, life is "rich", and oftentimes we have to solve more complex problems than those classically described in the textbooks. One of the great examples is this problem: How to calculate the buckling [...]

Mesh convergence with examples

July 27th, 2020|

I must confess, that I haven't always pay attention to mesh size. At the beginning of my career, I simply build my models and was happy when they converged. I was vaguely (and I mean vaguely!) aware, that the element size does "something". But I was absolutely happy with whatever default options were set! Now [...]

FEMAP API tutorial

March 17th, 2020|

I really like writing scripts that do stuff for me, so this post was a long time coming! I was just waiting for a time when I will be writing some FEMAP tools for my office. And finally, the time is now! Automating work in FEMAP (or any other FEA package) is a great idea! [...]

2D vs 3D Finite Element Analysis (with examples)

March 6th, 2020|

My relationship with 3D FEA is definitely love and hate. There are things I think are critical, and those that are completely unnecessary most of the time. Let's take a deeper look into this today! 3D FEA has an advantage: there are things that you simply cannot solve in 2D. But of course, this doesn't [...]

Femap Bolt Preload Tutorial

November 25th, 2019|

I think that many engineers, especially in the structural field, start FEA to calculate complex connections. There are few traps on such problems, and one of them is preloading bolts! This is why I've created a tutorial to do just that in Femap! I hope you will like it! There are several ways in which [...]