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Hi Guys I am currently learning to use Gridap. How many of you have actually used open source PDE solvers for real engineering work? (FEnics, SfePy, Gridap etc...) Just curious since some of these open source solvers have really amazing functionality.

Hi Guys Please refer to the attached images. The PSD has been developed using initial conditions on the "theta" coordinate for a coupled spring pendulum the natural frequency of the spring system is 2.72Hz and of the pendulum motion is 1.36Hz. The parameters are sized such that parametric...

Hi Guys Can someone please share a good reference for nonlinear analysis of spring elements? I currently own a copy of Krenk's nonlinear book which does not specifically discuss springs. Looking to implement the procedures in Matlab/Octave, to perform nonlinear transient analysis Kind regards...

Hi guys I am busy with a proposal for my MSC, and struggling to find mechanical systems which use resonance in order to function or perform better. Looking for something whereby resonance is induced and maintained even when parameters are changed during operation. A bit vauge but I would...

Hi Guys Sorry if this is a dumb question. I recently purchased a new home with a central aircon. We had a faulty capacitor which was fixed however during troubleshooting the problem a dummy capacitor was put in, and the aircon worked very well. Cooled down the house significantly. Thereafter...

Greetings FEA Gods Has anyone had any success installing Nastran-95 on a raspberry Pi? If so please post your procedure to get it up and running. Kind regards Mishal Mohanlal

Greetings Structural Gods In all structural books I have looked at (mechanical and structural) it seems that the welds are always taken as a unit thickness (1mm), and this is used to develop the required mechanical properties. I have been messing around with a program I developed, taking the...

Hi Guys I have been developing a FEM toolbox on Octave. With regards to CST elements, the element stresses can be calculated using DBq. The stresses attained can be takes as the stress at the centroid of the element. How can one calculate the nodal stresses from the element stress?

Hi Guys I am currently doing an audit for some conveyor designs where the client has raised some concerns with regards to the structural integrity (the full story is a bit more complicated then this) The design company has sent through a whole bunch of information. I am currently just doing a...

Hi Guys I know that there is a group for engineering programs but I felt that this would be a better place to post. I work for a firm where I design structures for dynamic loading, pontoons and complex plate work structures, for my analysis I use Strand7 which I think is extremely powerful as...

Greetings FEA gods I am familiar with the use of calculix on windows. Has anyone managed to get calculix running on a Debian system? I have tried the general installation from the terminal: sudo apt install calculix-ccx sudo apt install calculix-cgx However after that I am not sure what to...

Hi Guys Not sure if this is the best group for my query. So I have been developing an FEA toolbox, most of the coding has been done through Octave on a Raspberry Pi. I normally use remote access from one of my laptops to access the Pi and do the coding. The Pi also supports the use of python...

Greetings Structural Gods I generally use the SANS codes when designing structural steel and venture to other codes such as the AISC for the BS codes when dealing with aspects not covered in SANS (eg angles subjected to bending). Section F11 of the AISC deals with rectangular bars, does the...

Hi Guys I've been designing conveyors for a number of years now. Conveyor designs were initially not part of our scope of work, however to take on full plant designs we began to develop conveyors since many of the smaller companies did not meet many regulations with their designs. My conveyors...

Hi Guys We currently use NX for the modelling of pontoons, which may not be the most elegant tool for the job but it fits into our data management system. We do use Tekla in another team within our office, which is a very effective tool for modelling structures (which is essentially what our...

Greeting Fellow Structural Engineers I generally use SANS10162 for most of my steel work designs, however I do use AISC and BS/EN standards for design aspects not covered in SANS10162. For beams SANS10162 requires that the lateral restraint be provided on the compression flange, however this...

Hi Guys There is no forum specifically for maritime engineering hence the post here. I have been dealing with the design of pontoons for a number of years now, the pontoons are used for industrial and mining operations, and I have been adhering to our local rules and regulations. Over the...

Hi Guys I am currently developing my own Finite element toolbox on Matlab. The idea is to incorporate truss, beams and shell elements in the toolbox and eventually develop something that can interface with gmsh and/or develop solutions to standardized components via txt files developed from an...

Hi Guys I have done a number of structural designs whereby the support structure has to be designed for a case whereby they would be dragged on soil. When it comes to the dragging force I have in the past assumed a coefficient of friction of 0.7 which I assume is conservative based on the...

Hi Guys I am currently studying a book called "Non-linear Modeling and Analysis of Solids and Structures" by Steen Krenk. The book mentions some FemFiles which the author has developed using Matlab. These files are supposed to be available from the author by means of the internet as stated in...