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I am doing a simulation of a Prestressed concrete containment vessel for
internal pressurization test. currently i have made a 3D concrete model
and embedded a reinforcing structure and tendons into it using embedded
region option. but during analysis, it is showing that ratio of
deformation speed to wave propagation speed exceeded 1 in some elements
and the job is getting aborted. someone pls help me figure out what
could be the reason. I have attached my input file for
reference......thank you....

I have been asking colleagues this question for some time.  I was a Ph.D. student of John W. Hutchinson, who was a Ph.D. student of Bernard Budiansky, who was a Ph.D. student of William Prager.  But for years, the Mathematics Genealogy Project listed the advisor for Prager as “unknown”.

Is it possible to buy an ABAQUS licence (or token) from another institution?  In Malaysia and Singapore, the sales of ABAQUS appear to be controlled by WorleyParsons who charge rather exorbitant prices on the licenses - e.g. I got the student edition from the web for USD99 but in Malaysia, the price sold by WorleyParsons is 3+ times more expensive.  I am thinking whether I can pay another institution for some tokens to run jobs.  Thanks.

Greetings, 

Recently I have been indulging into loads of papers on "Progressive Damage Methodology".

I wondered based on what theory did the "Progressive Damage Methodology" intrigue so many researchers to unfold various kind of experiment and simulation, in other words, why do people have to study on this methodology?

Also, I was curious on the difference between "Cumulative Damage" and "Progressive Damage".

Can anyone here possibly give me some advice on the two questions?

 Faithfully,

James

Hi

     I am doing seismic analysis of Fluid filled cylindrical steel tanks using FEM. In this analysis I m supposed to find Base Shear and Overturning moment. Steel tank is thin shell and is flexible. For the complete loading of the shell I have its stress field i.e I have Nxx, Nxy, Nyy, Mxx, Mxy, Myy components of the thin shells middle surface. They are per unit length. Using these components how I can find Base Shear and OTM?

      Any reference/suggestion for this study....

Thanks in advance

Srinivas 

Hi all,

I 'm  interested in finding a complete seachable database on carbon/epoxy orthotropic prepreg [properties and values]. Those values are needed to be inputted into my finite element program for my thesis. One of those materials which i'm trying to find is the MR50/LTM25 as well as several others.

Any suggestions would be great

Thanks 

Kind regards,

Ee Lian

How can I run an analysis that starts in Abaqus/Standard and can be continued in Abaqus/Explicit? Does Abaqus automatically take care of data exchange between them or it should be manual. In other words, can I define step1 in a model run by Abaqus/Standard then immediately running step2 under Abaqus/Explicit?



Thanks,

Ahmad Falahatpisheh

PhD student of Mechanical and Aerospace Engineering

Edwards Lifesciences Center for Advanced Cardiovascular Technology

2141 Engineering Hall

University of California, Irvine