composite material data
hi, i want yield stress and plastic strain data for aluminium and epoxy resin.actually i m doing project on composites.....
Blog posts
Genetic algorithm for function optimization with Matlab
Hi, Matlab experts !
Did someone work with Prof. Houck's paper (A genetic algorithm for function optimization: A Matlab implementation, 1995) on the genetic algorithm ?.
In his paper he proposes 3 online tutorials (gademo1.m; gademo2.m; gademo3.m) for working with the function "ga" in Matlab but it's all for Matlab 5. This function syntax has changed considerabily in Matlab 7. The key point is that we cannot define "bounds" which is a matrix of upper and lower bounds on the variables with Matlab 7.
So how Matlab 7 deals with this problem ?
Three postdoctoral positions at Lawrence Livermore National Laboratory
The Computational Physics group in the Atmospheric, Earth, and Energy Division at the Lawrence Livermore National Laboratory (LLNL) is solicitating applications for three postdoctoral appointments in the following areas. To access the full description and application instructions, please visit http://jobs.llnl.gov and search for the job numbers below:
008351: geomechanics of fluid-induced fault activation
008374: dynamic impacts into granular materials
008375: mechanics of dynamic impact and penetration into ceramics
Journal Club Theme of May 2009: Configurational forces in finite elements - energy-based mesh adaptation
*This issue of the Journal Club has been prepared as a group by Ankush Aggarwal, Mo Bai, Mainak Sarkar, and Jee E Rim, and with comments and suggestions from Bill Klug .
Error Code 144
1. I am writing a UMAT for 3-D analysis of a Single crystal. When I run the UMAT I get a message saying: aborted with system error code 144.
2. I serached for this error code online and it stands for: The directory is not a subdirectory of the root directory. (Windows error codes)
I am using Intel Fortran 10.1 with Abaqus 6.7-1
USNCTAM Address 2009
Check out the talk by Dr. Arden L. Bement, Jr., Director , National Science Foundation
on TAM
at http://www.nsf.gov/news/speeches/bement/09/alb090424_tamsymp.jsp?govDel=USNSF_51
For the proceedings of the 2008 SBE&S workshop go to
FRANC3D - the next generation
I guess it is about time some one from the Cornell Fracture Group got on this site to try help answer questions related to the CFG software or other fracture mechanics related questions. We do try to answer questions sent to us via email, but sometimes a forum like this would be best and we do appreciate other users input, feedback, and answers.
abaqus drilling
hi...i am doing drilling simulation on abaqus....
it consist of two parts...a tool and a blank....
now when i am running analysis...tool touches the blank and goes back.
i checked material data...density,elasticity...and i used surface to surface interaction with penalty as interaction property.... is there any other data that i need to include....???if yes then how....
can any one tell me ...
Tom Hughes elected to National Academy of Sciences
Congratulations to Tom Hughes for the election to the US National Academy of Sciences. See the full list of the new members.
Nonlinear Analysis
Hello,In order to nurture you in an effective manner regarding the Newton-Raphson method I recommend you to consult the excellent treatise of I. M. Smith et al. entitled "Numerical Methods for Engineers ", ISBN-13: 9781584884019.Furthermore this method is elegantly elaborated in Finite Element Formulation in the outstanding book of I. M. Smith indicated as "Programming the Finite Element Method ", ISBN-13: 9780470849705.In addition the geometrical nonlinear formulation is transparantly and completely detailed in the famous book of W. F. Chen et al.