Blog posts
Consistent linearized tangent moduli for hyperelastic materials... is it always a positive definite matrix?
In order to obtain numerical solution of problemsthat involves a hyperelastic material model, we use what is known as incremental/iterative solution techniques of Newthon's type. The basic idea is to contruct a discrete system of nonlinear equation, KU=F, and solving it using a Newton's method or a modified version of it. As we know, its lead to a systematic linearization of the internal force vector and by the chain rule to the linearization of the material model.
Picking a node within a 3D Solid Volume
hi all,
I have a solid 3D part made of concrete. I would need
the results of a few points inside the concrete. However, I realised it
was not easy to pick them when doing a Set because the nodes are hidden
(they are not on the surface. I have 1) partition my model exactly at
the points when I need to pick 2) i name the points as datum points.
Using the CAE interface, how can i pick this nodes? I have attached a pic for better understanding. Can anyone please advise?
Thank you.
Project Tuva (Feynman's lecture series)
Here is an interesting link I came across while searching for the Feynman lectures -- Project Tuva.
http://research.microsoft.com/apps/tools/tuva/
It provides each of Prof. Feynman's seven lectures delivered at Cornell as a part of the Messenger lecture series. This format of posting lectures by Microsoft is absolutely amazing. I hope more such lectures especially videos of keynote lectures in leading conferences and congresses can be made available online.
-Arun
solving equations
Hello every one,
Please look at attach file and let me know your idea about solving this nonlinear system equations.
UEL, ABAQUS input file
Hi all,
I have created a triangular element for abaqus, I did this in Matlab, compiled that to C, compiled that to an object file. When I run a simple script, where I do not use the element, but just say that user=userelement.obj, the system runs without a problem. When I change my input file as follows:
* user element, type=U3, nodes=3, coordinates=2, variables=31
*UEL PROPERTY, ELSET=ALL
1
*Element, type=U3
1, 1, 2, 3
Creep simulation - welded zones
I am trying to simulate creep damage in welded components in ABAQUS. I have four different sections in the same model assigned to four different materials. They are weld metal, base metal and Heat affected zones. I have to write a creep subroutine. For all the zones, creep equation is the same , but the parameters or constants change. i want to know how can I assign different parameters for different materials in the fortran source subroutine? what is the variable used for Material 1 , material 2 etc in standard ABAQUS?
RUSSIAN SIGMA TECHNOLOGY COLLABORATES WITH XC ENGINEERING OF ITALY
PRESS RELEASE
Russian Sigma Technologycollaborates with XCENGINEERING of Italy
Two leading engineering companies to cooperate for thedistribution of unique design optimization software IOSO in Europe.
An Urgent Appeal for Your Support of My Job Application at COEP's Mechanical Engineering Department
Dear iMechanicians,
I have applied for the job of "Associate Professor" in the Department of Mechanical Engineering at COEP, Pune, India [^]---the same place from where I did my PhD (Mech.) research.