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software of interest to mechanicians

vtk.js vs. three.js

vtk.js is a recently released javacript version of vtk. Here's my experience with it and how it compares with three.js today. http://www.parresianz.com/javascript/typescript/vtkjs/threejs/vue/vtkjs-ellipsoid/ 

-- Biswajit

Visualizing ellipsoidal particles with three.js

You will find my new article on visualizing ellisoids with three.js at http://www.parresianz.com/javascript/typescript/threejs/vue/vtk-threejs-ellipsoid/

This series contains almost all the information you will need to create your own viz tools in javascript.

-- Biswajit

Simpleware Workshops: Denmark and Sweden (March 15th-16th 2017)

Simpleware logo

 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.

Javascript frontend for simulations?

I've been exploring the possibility of frontend development for engineering simulations in Javascript.  Following on from the previous post on generating VTK XML particle data output files from our simulation, her's a new post on reading in those files in Javascript.  See my article at http://www.parresianz.com/javascript/typescript/vue/vuex/xml/reading-vtk-particles/.

-- Biswajit

soheil.tahmasbi's picture

Ductile damage calibration in ABAQUS

Hello,

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. 

Particles and VTK

The find out how data from your particle simulations can be written out in VTK XML format, examine http://www.parresianz.com/c++/xml/vtk/vtk-particle-output/

-- Biswajit

Simpleware Cambridgeshire Workshops, March 2017

We're running a series of free software workshops in the Cambridgeshire, UK area from March 7th to 9th on using Simpleware software for 3D image data visualisation, analysis and model generation.

March 7th: Cranfield

March 8th: Cambridge

Writing VTK output files in C++

If you're interested in visualizing your data with Visit or Paraview, it's convenient to write out VTK files.  If you are a C++ person you will find my post at http://www.parresianz.com/c++/xml/vtk/vtk-output/ of interest.

-- Biswajit

JSON or XML for your input files?

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/.

-- Biswajit

Webinar - Tips & Tricks for Simpleware ScanIP, Mar 1-2 2017

Date: Wednesday, March 1, 2017

Time: 9:00 am PST (West Coast) / 12:00 pm EST (East Coast) / 5:00 pm GMT (UK) / 6:00 pm CET (Europe)

Attend this webinar focused on the ScanIP module of the Simpleware software suite. Learn how to improve the image processing and segmentation aspects of your Simpleware workflows.

Reading input files in your C++ research code

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. 

Regression testing with the Command design pattern

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.  

Modernizing your old c++ code

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.

-- Biswajit

Formatting your C++ code

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/.

-- Biswajit

Emilio Martínez Pañeda's picture

Abaqus2Matlab: A suitable tool for finite element post-processing

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:

http://www.sciencedirect.com/science/article/pii/S0965997816306512 (a pre-print is available at www.empaneda.com)

Free Simpleware workshop in Chicago - Wednesday February 15th 2017

Date / Time: Wednesday, February 15, 2017 / 9:30 am - 12:30 pm

Location: Chicago, IL, USA

Fee: Free-to-attend. Pre-registration is required as places are limited

Register

Who should attend

Webinar - Scripting: Automating Workflows in Simpleware ScanIP, Feb 8 & 9 2017

Simpleware Webinar

 Date: Wednesday, February 8 & Thursday, February 9, 2017 

Time: Wednesday - 9:00 am PST (West Coast) / 12:00 pm EST (East Coast) / 5:00 pm GMT (UK) / 6:00 pm CET (Europe)
          Thursday -     8:00 am GMT (UK) / 9:00 am CET (Europe) / 1:30 pm IST (India) / 7:00 pm AEDT (East Australia)

Free Lunch & Learn Seminar with Simpleware and SIMULIA, Jan 17th, CA

Date / Time: Tuesday, January 17, 2017 / 10:00 am - 3:00 pm

Venue: Dassault Systemes | 3979 Freedom Circle, Suite 750 | Santa Clara, CA 95054-1249

Fee: The workshop is free, but pre-registration is required as seats are limited.

Language: English

Register here: http://simpleware.com/news-and-events/events/workshops/ll-santa-clara.html

What's the procedure to get the original written data from a figure in published paper?

Choose a channel featured in the header of iMechanica: 

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.

 

how to run a python script after each increment in abaqus.

Choose a channel featured in the header of iMechanica: 

hi,

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.

 

thank you

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