education

Hi all,

      I doing modelling on soft clay behaviour which exhibit softening behaviour during constant strain loading. Here i followed a non-associated flow rule for better prediction of dilation . For the case of non-associated flow rule yield function and plastic potential function should not same i clear in that , my doubt is that we can use two different surface for yield and plastic potential function (eg: linear surface as yield surface and elliptical surface as plastic potential )? 

Hello,

I am trying to derive/find an analytical expression
for the torsion of a round bar made of an heterogeneous material. But I just do
not seem to find any solution available in the literature other than for a
homogeneous material, which can be find in any theory of plasticity book (e.g.
Theory of Plasticity, 3rd Ed., J. Chakarabarty, pp. 132-136).

how to calculate ultimate load for cold formed steel lipped channel columns size 90mm x 50mm x 15mm x 2mm length is 300mm AS PER INDIAN STANDARD

Hi everyone , 

I'm Yashaswi Prateek  doing by final year project on fracture in composites using ABAQUS. I'm new to ABAQUS and have been trying to do some tutorials to get a better understanding of the software. After basic tutorials , i've started trying to generate a model using cohesive elements where i got stuck up. I have tried the procedure in Abaqus user manual and is showing some errors regarding interaction properties and creating a step.  It would be great help if someone could help me regarding how to model with cohesive elements.

Does anyone know of a good source for free science and engineering illustrations? I'm particularly interested in crystallography, crystal defects/dislocations, and mechanical properties illustrations.

Thanks 

Hi, everyone:

    I'm recently very interested in computational nolinearity. Would you like recommend some monographs on the computation nonlinearity so that i can have a better understanding of the mechanism of ABAQUS.

    Thanks

 Dear all:
    I recently find an example in ABAQUS documentation cannont convergence.
    The parametres related with the iteration of the Risk method is 

arc length  initial increment    minmum increment  maximum increment  maximum number 
 1                0.0001                1E-10              1E+36       100000
    The location of the exmaple in ABAQUS documentation is Abaqus Example Problems Manual->1 Static Stress/Displacement Analyses->1.1 Static and quasi-static stress analyses-> 1.1.5Collapse of a concrete slab

I recent read the book of Prof. J. Tinsley Oden "A short course on nonlinear continuum mechanics"

 http://users.ices.utexas.edu/~arbogast/cam397/oden0908.pdf

 which declares that reference configuration is an open, bounded, connected subset  of R3 with a smooth boundary (in Page 1).

It is strange to me beacause that means we cannot consider the boundary of the deformable bodies in its following discussion.

does anybody have  the abaqus seminar pdf ''modelling heat transfer and thermal-stress analysis with abaqus'' ???

 perhaps an older version...i d like learn it, hope u guys can help me, thank u very much.

if u have the pdf file, please give a freelink with dropbox or sth alke, or send me direct to zsc13810288137@hotmail.com

hi i am new to abaqus software.  i am doing research on failure analysis of composite material.  i want to model the workpiece and machine by a tool.  any one can please help me if you have any tutorial to model this explicit analysis.  i want to analyse the chip also.

please send the help link to stkrajan@gmail.com

thankyou

with regards

kasirajan

Saber El Arem (node/14053 ) wanted to know how a fractal surface mesh could be created.

I've had to do that in the past.  What I did was to use Arjun Viswanathan's 1999 Matlab snippet on creating a plasma fractal and write a wrapper around it to create an output file that could be read by the then available version of Abaqus.

I've attached a couple of Matlab files that should be able to do the job.   The .txt extensions are needed because iMechanica does not accept files with .m extensions.