Blog posts

Dear all,

Folks,

I'm embarking on a project to build a modified copy of a DIY 3D printer.  See http://reprap.org/wiki/WebHome to get a rough idea.  In my case, I have my own lathe and milling machine, so I can fabricate more substantial components, e.g., by machining aluminum.  I also have larger stepper motors, some 3/8" precision rod and linear bearings that I can use. 

I need to model viscoelastic behavior of polymer. I have storage modulus and loss modulus data as a function of temperature. I have found to determine the Prony series coefficients Ansys need shear and bulk modulus as a function of time-temperature. Does it mean complex shear moduls which can be calculated from storage and loss modulus. Can anyone advise me how I can use my data to calculate Prony series coefficients using Ansys?

A number of 3 year PhD-Student positions in the areas of mechanical engineering, process engineering and applied mathematics is available in the Post-Graduate School "Micro-Macro-Interactions in Structured Media and Particle Systems", Otto-von-Guericke-University Magdeburg, Germany.

Further information can be found at  http://www.uni-magdeburg.de/gkmm/free-position-new-gk.htm

A recent discussion at iMechanica following my last post here [^] leads to this post. The context of that discussion is assumed here.

I present here three sample problems, thought of almost at random, just to see how the suggestions made by Jaydeep in the above post work out.

PRL 104, 215503 (2010)