industry
Engineering position open
Submitted by Hiring Mgr on Tue, 2010-02-02 19:22.Smith International, Inc., a Fortune 500 Company, is a world-wide leading supplier of premium products and services to the oil and gas exploration and production industry, the petrochemical industry and other industrial markets. We are seeking to hire a qualified candidate to fill the position of Engineer III in our Houston, TX location. The successful candidate will be responsible for planning, organizing, and executing design development projects resulting in the definition of new products and
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Sigma Technology shares the success of aircraft buiders (IOSO news)
Submitted by IOSOnier on Sat, 2010-01-30 16:10.29 January 2010 New Russian Fifth-Generation Fighter made his first flight. This aircraft was designed by company Sukhoi with the new engines designed by NPO Saturn. We would like to express our proud and mention that both companies have used IOSO Optimization software as a regular part in their design and development technological cycle.
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moving water with pressure/vacuum
Submitted by Shannon Churchill on Mon, 2010-01-18 13:00.I am trying to move water using a vacuum pump. I have a vacuum pump hooked up to a tank that has one inlet, one exit with a length of hose and check valves on both. What I am doing is creating a vacuum in the tank, causing water to fill the tank. Then using the pump to generate pressure in the tank to discharge the water. I know the pressures/vacuum required to lift/push the water for my suction and discharge heights.
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Ferrari Millechili project --- the next generation of sport car
Submitted by Mike Ciavarella on Sat, 2010-01-16 17:38.I am going to Modena on Monday to talk to my collegues in the Millechili lab (MilleChili means 1000Kg in italian)
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Challenges in the finite element analysis of tire design using abaqus
Submitted by American Engine... on Thu, 2010-01-14 19:25.Finite Element Analysis of Vehicle and Tire has become a very important aspect of a tire design and failure analysis to most Tire companies. Tire modeling with ABAQUS is a very complicated process involving complex materials like hyperelastic rubber and textile reinforcements, large model size, prolonged simulation time and various convergence issues. This white paper intends to help in understanding the challenges in tire analysis and several tips and tricks that makes a difference in the quality of the results and processing time. AEG hopes that this article will be useful to ABAQUS users working in the field of tire design and analysis.Complete Article:
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Nitinol Webinar next week
Submitted by Xiao-Yan Gong on Thu, 2009-11-05 17:32.
An Introduction to the Unique Material Properties of Nitinol
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Shell vs. brick elements in buckling analysis
Submitted by davidhoucque@gm... on Sun, 2009-11-01 02:06.Dear All:
I have a structural problem which deals with "Buckling" analysis of a boom with a rectangular cross-sectional area
and 0.25 in. thickness.
Can I use brick element (8 nodes) instead of shell element to simulate buckling of this type of structure?
Thank you for your insight.
David.
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Disk vs blade natural frequencies
Submitted by cryogene on Fri, 2009-09-04 18:08.I'm trying to determine the coorelation of a blade natural frequency and disk (nodal diameter) natural frequency on a Turbine wheel in ANSYS Modal analysis. Is it possible for a blade natual frequency to be excited even though a disk natural frequency is not being excited?? I'm having trouble determining if a blade frequency is related to any disk nodal diameter. Thanks for any incite on this subject.
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FEA Improves Reliability of Flip-Chip Packaging
Submitted by Zhen Zhang on Wed, 2009-08-19 17:16.
On Aug 10, 2009, Semiconductor International (SI) Newsbreak published a report on my work in AMD about 3D fracture study of underfill delamination as the top story in that issue. I have never imagined that. Except the pleasure I received from this good news, I wonder if this work is also interesting to iMechanica community. For that reason, I attach here the SI news report and the original paper published on ITherm2008 Proceedings. Welcome any comments and thoughts.
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The Boundrical Conditions On Knee Model
Submitted by saveh on Sat, 2009-08-15 08:55.Hello All Dear:
I have a model of the knee with its soft tissue between 2 femur and Tibia Bones, then I want to load 2 boundrical condition
s on it , 1- The 6-DOF's of Tibia and Femur Bones Center of Mass, (x,y,z,R1,R2,R3) time dependent. and 2-The
concentrated load that is exerted on the cross section of the Tibia Shank (Lower Bone) Time Dependent. Then Dear, Can
anyone Help Me,Please how to Put these 2 kinds of Boundrical Conditions on the Model.
Kind Regards.
Amir Hossein.
FEAP
Submitted by fernando.romagnoli on Tue, 2009-07-07 19:56.Hello All,
Actually I am analysing the FEM software FEAP, it is a free FEM software that can be downloaded from:
http://www.ce.berkeley.edu/projects/feap/feappv/
Anyone here knows if the software can run ONLY in cmd ?
I mean, I generate an input file I call the solver than the solver generates an output file without opneing any window in my desktop or in my cmd?
Regards
Fernando Romagnoli
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Fatigue to Fracture - paper in print
Submitted by Xiao-Yan Gong on Wed, 2009-06-03 16:12.This article will appear in Journal of ASTM International. I hope you find it useful.
Xiao-Yan Gong, President, medical implant mechanics LLC
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Design Optimization Software HEEDS v5.3 Released
Submitted by Marcus Rademacher on Wed, 2009-05-27 20:58.Red Cedar Technology recently released its latest version of their design optimization and process automation software, HEEDS v5.3. It has direct interfaces to Abaqus, LS-DYNA, and other tools.
Check out the press release, or go read about the new features.
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NDE residual stress
Submitted by ennio curto on Tue, 2009-05-19 16:04.More information about residual stress tester
The residual stress in a metal do not depend on its hardness, but from the module of elasticity or Young module and from its chemical composition (density).
The hardness of a metal indicates its ability to absorb energy elastic, plastic or kinetic energy, but through it not possible to determine the value of residual stress. In a metal with the same hardness we will have a different values of this stress. Therefore, the problem will be to measure the values that vary so exactly proportional to the residual stress values in a given metal.
The residual stresses tend to equilibrate themselves in the surface of the material.
Assigning Hardness to part in Abaqus
Submitted by pavan_k on Tue, 2009-05-12 18:57.Hello Friends,
I am working with abaqus since last year,
I am facing the problem in assigning the hardness property to the material in Abaqus.
If some one knows ,how to Assign a hardness in Abaqus Please let me Know.
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Wear Couple Charactersistics - CRES 347, 17-4 PH and Phosphor Bronze
Submitted by navanee on Fri, 2009-05-08 10:18.Hi,
Can anybody throw some light on the wear coupling characteristics between SS347 and 17-4 PH, as well as between Phosphor Bronze and 17-4 PH Steel?
It will be helpful if you could refer to some literature where I can learn about Wear Coupling Characteristics...
Thank You,
Navanee
bifurcation buckling using ABAQUS
Submitted by ranababu on Thu, 2009-04-30 19:57.
The following is taken from the book Concepts and applications of Finite element methods by Cook, Malkus and Plesha.
For bifurcation buckling, we have the following eigenvalue problem:
(K+Lambda Ksigma)delta d= 0
working on Tilting Pad Thrust Bearing...help me
Submitted by sprashant27 on Tue, 2009-04-21 06:34.
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Question about stochastic Finite Elements
Submitted by tlaverne on Wed, 2009-04-08 12:20.Hi to the community !
I would like to ask if anyone have some experience with stochastic finite elements in an industrial context ?
Would you know some software (free or commercial) package for stochastic finite elements ?
Why do I have the feeling that sfem methods which look to be very promising aren't used much in practice ? Am I wrong when I say that ?
Thank you very much for any help about that !
Thomas Laverne
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lagrange multiplier and contact elements
Submitted by ranababu on Sat, 2009-03-07 13:50.Hello,
I would like to know how contact elements are different from " general "ie non contact finite elements.
Also I would like to know how Lagrange multiplier method is used in contcat analysis.
My understanding of the Lagrange multiplier is like this: when we have to impose a constraint equation
[C][D]=[Q] as constraint between DOFs, we incude a term Y*{[[C][D]-[Q]} where Y is the Lagrange multiplier ,in the potential energy functional and minimize the functional to get the algebraic equations.
non linear analysis
Submitted by ranababu on Sat, 2009-03-07 13:39.I am trying to learn non linear FEA ( Newton Raphson method)and this is what my understanding is. Kindly advise if you think my understanding is correct.
Are you looking for KEO Carbon Pedals
Submitted by robpoulton on Mon, 2009-02-23 05:45.Are you searching for KEO carbon Pedals; The Attending KEO Carbon pedal embodies the absolute antithesis amid weight and performance. Twenty years ago if attending aboriginal invented the blow beneath pedal it afresh too was the criterion for all others that followed. At one time Shimano pedals could use attending fabricated cleats and you can see today similarities afresh with Shimano's use of an Attending block attending akin (no pun intended) in their SPD-SL design.
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Is there a failure criterion/model for brittle spheres?
Submitted by shuo zhao on Mon, 2009-01-19 16:20.Hi, everyone
I am a student. I am dealing with a failure problem of brittle spheres. These have a lot of flaws inside.I did some compression tests. Single spheres are crushed by a pair of parallel plates. I got the crush load distribution (in terms of critical contact force).
My question is:
is there a failure criterion/model which relates to load(critical contact force), Youngs moduli and Poisson ratios of shpere and plates, radius and friction coefficient?
Unfortranitaly, I can't get the friction coefficient between plate and sphere which influences the surface stress of spheres significantly as shown in ABAQUS simulation.
Both theoretical and empirical models are welcome.
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Interlaminar Stresses
Submitted by nav_mech35 on Wed, 2008-12-24 05:15.Dear Sir/Madam,
Interlaminar stresses in Composites
I have modelled Plain Stress problem in hypermesh(Input deck is created in Hypermesh to solve in Abaqus).Layup sequence is [0/90/90/0], am getting the Stresses( σ11, σ22, σ12) in top and bottom layers only, but unable to get the stresses at each Interface, If any one knows how to write the code, please reply back.
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Hi, I've a doubt in ANSYS
Submitted by tjasminmary on Tue, 2008-11-11 09:16.My doubt is in transient dynamic analysis.
take a simple model of 40*2*1 m dimensions.Applying brick45 material. with e=2.069e11N/m2
poissons ratio= .3
density= 7830kg/m3
first performing modal analysis with just arresting displacements in 1 side in subspace method and getting 10 sets of frequencies..
then performing transient dynamic analysis in mode superposition method with dynamic loads.and solve it
i can get value of the stress or displacement at each node and i can plot a graph for time vs displacement or stress at that node by using time history post processor.
what i need is
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