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Prof. Ares Rosakis has been elected to a fellow of the American Academy of Arts and Sciences, 2009

Submitted by Jianliang Xiao on

Solid mechanician and Caltech Faculty Member Named to American Academy of Arts and Sciences: Caltech professor Ares Rosakis, is among the 210 new fellows elected to the American Academy of Arts and Sciences this year. They join an assembly that was founded in 1780 by John Adams, James Bowdoin, John Hancock, and other scholars to provide practical solutions to pressing issues.



Error Code 144

Submitted by Michael_Bond on

Hello all, new to the forum, so I would like to say thank you in advance for any help I may receive.

 I have been using CPS8R elements to model a plane stress problem, in conjunction with a UMAT I have developed. This has been running correctly, and the results obtained are good.

I am now running an analysis using axisymmetric elements, CAX8R.

The output from CAX8R is..... S11, S22, S33, S12. The ouput from CPS8R is....S11, S22, S12.

I have therefore updated the damage model accordingly to account for this.

Heat Simulation and Analysis of a Railway tunnel

Submitted by chepatilio on

hello eve1,

i m facing some problem while trying to mesh a horse shoe type structure,  when i define the element type as solid 8 node 70 (brick8 node 70) it gives me error saying cannot apply coz it violaets the ASME code or some hting like that....plz help me out wiht what element type has to be defined for the HORSE SHOE type structure...............or whether to define the semi-circular portion seperately (with wat typr ) and the bottom portion seprate.

abaqus vumat-excessive distortion

Submitted by pani3882 on

Hi All



I am trying to implement a composite material model in vumat. So far, I
have been successful in getting the correct results for a cube for both
tension and compression with the cube being modeled with just one
element (C3D8R)



But when, i model the same cube (side 40mm) with 125 elements,
subjected to the same bc's, with the same material parameters, i get an
error that the element is undergoing excessive distortion.



I am specifying a density of 1.52e-9 ton/mm3.



What Platform Would You Prefer for a Software That Helps in Learning FEM---Windows or Java?

Submitted by Ajit R. Jadhav on

Ideally, this post of mine should carry a poll, but I guess as an ordinary user, I cannot insert one.

Currently, I am writing a small software program that is especially designed to help learn FEM. For instance, I will be providing detailed listings for every intermediate step, e.g. all those [D], [B], [k], etc. matrices for each element, as well as the final assembled global system {F} = [K]{d} and its solution separately at each Gauss point. Only linear static problems for the time being; will add transients/eigenvalue problems in near future.

Post Graduate Researcher or post doctoral position in developing fish life cycle model

Submitted by Arash Massoudieh on
Post doctoral associate or post-graduate researcher position is available in the Department of Civil Engineering at the Catholic University of America ,Washington, DC. The candidate should be proficient in C++ programming and OOP concepts and preferably (but not necessarily) GIS applications. PhD degree is not necessary. The project involves developing an agent-based fish life cycle model for San Francisco Bay and Delta. The initial appointment will be for two years with the possibility of extension based on satisfactory performance.

Thermal Ratcheting in Cylindrical tubes

Submitted by unsrohith on

Hi ,

Due to  Thermal ratcheting in cylindrical pipes carrying hot fluids that are used in nuclear applications, the pipe bulges. I am about to start a project to study why this bulge comes and how to rectify it. It would be very helpful to me if  some of you can give your valuable suggestions and references in the area of Thermal Ratcheting in pipes.

Thanks and Regards,

Rohith   

Effect of Fiber Geometry on Pulsatile Pumping and Energy Expenditure

Submitted by Arash_Kheradvar on

Myocardial fiber orientation is a topic that has recently received much attention in connection with cardiac pumping function. The twisting motion of the cardiac base to apex can be a direct result of this geometric orientation of these fibers. One important question that has not been addressed yet is whether there is any relationship between the contractile energy expenditure and the geometric orientation of myocardial fibers. In the present work, we study the effect of contractile fiber orientation on pumping function.