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There is also the issue of mesh compatibility. How do you connect 2 adjacent circular elements? Given an interpolation inside the element, to get a proper compatibility you need to describe similarly, in each element, the frontier between the 2 elements. I haven't thought about this more than...

Thanks for all your answers! @271828 I'll try to rework the introduction. It is still a challenge to find a catchy yet precise intro, I probably went too far ^^. @IceBreakerSours The matrix inversion is a good point, but in my opinion it is a software implementation topic. Here I just wanted...

Hi everyone, I recently wrote an article about the finite element method. I tried to provide the full picture about the method, while focusing at the details that are the most important in my opinion. Let me know what you think about this content :) Ali

I don't understand why you cannot derive the geometric stiffness matrix for the MITC elements. I agree that you will not find it in close form in any paper. But you should find all the relevant information to derive the matrix by yourself. This element is used in non linear analysis in ADINA for...

Thank you for your answer Greg. You have put the finger where it hurts currently. The value proposition and the target customers are what I am trying to define. My assumption about it right now is that the target customer is the medium or small company that needs simulation software (which...

Other people still have access to your code and can start parallel project. I guess it is still open source.

Even though anyone can change anything anytime, there is still someone responsible for integrating the work of others. Besides, a strong validation procedure can be applied at each new release. Similarly to commercial software, a new release is not expected every night.

Thanks for your answer. When I mention tailored FEA, I do not imagine going as deep as modifying elements formulations. Instead, I imagine focusing on operations that can become time consuming and that can be automated. For instance, properties definition, loading case definition and so on...

Hi everyone, I have been working on a finite element project for a few months: SesamX. To introduce SesamX briefly: It focuses on mechanical simulation. It provides the usual elements (truss, beam, shell and 3d solid). It can import mesh data from Abaqus input file or Salome .med file...

Let's take the example of an aircraft engine. First, as rb1957 has stated you need to make an initial assumption of your whole model stiffness. Most of the time, this work is done by the pre-design team whose job is to roughly design the engine from its specifications and the technological...

Abaqus documentation deals a bit with shell to solid connection. You can find ideas here: https://abaqus-docs.mit.edu/2017/English/SIMACAECSTRefMap/simacst-c-shelltosolidcoup.htm You can also find more ideas on google. Then you have to see whether you can apply it using your FEA solver. My...

Hi everyone, As part of my work on the SesamX finite element software, I have written articles about the 3 elements that I have studied lately: the truss, the Timoshenko beam and the MITC4 shell element. I wanted to write reference articles that gather everything that is useful to know to...