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Hi

Hi all,

Can anybody help me out running a VUMAT with double precision?

If I define my variables in VUMAT as double precision and run "abaqus user=... job=..." the values do not match those in the inp file.

On the other hand, if I run "abaqus double user=... job=... " I get the following error:
Abaqus Error: Abaqus/Explicit user subroutines cannot be supplied as an object
file when double precision is used.
Abaqus/Analysis exited with error(s).

I know maybe it's a stupid question but I'd really appreciate if someone could give me a hint.

Hi,

There is an assumption that nanoparticles (e.g., graphene or CNT) change the local properties of polymer (here, epoxy) around them, perturbing the polymer chains. Which (not too expensive) methods exist to explore this assumption experimentally? How can I study the atomistic scale structure of polymer around the graphene sheets, and compare it with rest of polymer?

Leon

Hi, 

I am using a steady-state dynamic analysis procedure to model harmonic loading of a structure. I am investigating different material definitions. When I applied transversely isotropic stiffness using engineering constants, I saw a much different response than expected. So, as a test, I compared the following two models which gave DIFFERENT results: 

1) Simple cylinder with linear elastic, isotropic material properties (E, v), structural damping (0.05) and density of water. 

Dear Colleagues,

We recently have reported first measurements of surface stress evolution in a material as a function of uniaxial time dependent deformation and at temperatures upto 100 degree C using a new analytical technology, Nanomechanical Raman Spectroscopy developed in our lab (Interfacial Multiphysics Lab directed by Dr. Vikas Tomar at Purdue).

In particular, we wanted to bring to your attention the following publications:

hai friends,

me doing engineering design... my project tite is "interaction of stress intensity factor for perpendicular cracks" this is y final yr project....pls guide me finding problem & knowing about the fracture mechanics and the purpose of stress intenssity factor..i really need the ansys analysis procedure for creating perpendicular cracks... pls help me friends ...send some link or web page ..

 PLS send details to my mail id    ashwin.prabhu1990 [at] gmail.com  

Dear iMechanica members,

I am looking for a postdoctoral position to work in an experimental lab mainly focused on fuctional polymer material (like- hydrogels, composities etc.) synthesis.

Currently, I am working as as postdoc at UNC-CH to reveal the physical properties of living polymer material mucins/mucs.

I have completed successfully my PhD from the University of Hokkaido, Japan under the supervision of Professor JP Gong.