Join us at the Technical University of Denmark on March 15th, and in Gothenburg on March 16th, for free workshops introducing how to use Simpleware software for 3D image data visualisation, analysis and model generation.
I am using abaqus for simulating a rockfall flexible barrier. I calibrated ductile damage parameters for high-strength steel wire of 4 mm diameters and the results are very close to the ones from experiment. I assume that ductile damage is a material properties and should not change by changing dimension, but when I used the calibrated parameters for 3mm wires, the results are not stisfactory.
Either, depending on your taste and use-case. I prefer XML for aesthetic reasons, but that format can get verbose. Check out my new post on how to read JSON files in your C++ code at http://www.parresianz.com/c++/json/json-input/.
Mechanics research codes are typically written by graduate students who aim to get their work done as quickly as possible. These codes are not meant to last beyond the publication of a few related papers. These files have the advantage that they can be read in quickly using an input file stream and the code for doing that can be written in minutes.
Computational mechanics practitioners are not typically known for practising well-established software engineering techniques. That makes code developed by various research groups next to impossible to understand and modify. I still see requests on iMechanica on how to implement Drucker-Prager models when every freshman student probably has their own implementation. It is likely that the person who developed a particular code cannot themselves understand the code a few years after the relevant paper has been published.
Continuing yesterday's thread on new C++ productivity tools, here's another one on using clang-tidy to modernize your code automatically to C++11/14. Life becomes markedly easier after the code has been updated. Check out my post at http://www.parresianz.com/c++/clang-tidy/ to see how I've integrated clang-tidy into my toolchain.
Some of you may be involved in computational work where your students develop C++ codes. If the code is formatted well it's easier to read and understand. With the creation of clang-format, the job of formatting (and not just indentation) can now be automated to a great extent. For a few pointers on how-to, check out my post at http://www.parresianz.com/c++/clang-format/.
A new piece of software has been presented that connects the well-known FE code Abaqus with Matlab. The source code, detailed documentation and a large number of tutorials can be freely downloaded from www.abaqus2matlab.com
Some interesting applications are addressed in the associated journal article:
I'm wondering if there is a way to get the original data for some figures in published research papers? I've tried to contact the authors, but no responses come back, could I get this data from the journal where is this paper published?
Please give information if you have experienced with this case.
I am doing static stress analysis. in my problem, I have to update my input file after each increment. so for updating the input file, I have to do some calculation depend on the output of the previous increment result. for these calculations, I have to call the odb file after each increment, do some calculations, update the input file and the process will go on. I have written a python script for the calculations from the odb file but don't know how to use this script after each increment.
I am using an open source FEM platform, which requires you to convert your equation system to non-dimensional form. So, there are no units specified for the parameters in the problem. If you use compatible input units, you should expect the output in matching unit - just like one would do in a normal python or C++ code for solving physical problems. I have an elasto-plastic dynamic problem to solve, and these are the parameters for the Drucker-Prager Soil Model for soft clay.