Do you know how to predict the mechanical properties of wire after being drawn with several dies ? especially with Duplex stailess steel material.

A postdoc position in multiscale stochastic computation will be available in Fall 2008. Experience on finite elements, multiscale methods, high performance/parallel computing, or computational fracture/damage modeling is desired. Please contact:      

X. Frank Xu, xxu1@stevens.edu
http://personal.stevens.edu/~xxu1

A Cosserat Point Element (CPE) for finite deformation elastic-viscoplastic materials

Background: Recently the theory of a Cosserat Point has been used to develop an eight noded 3-D brick Cosserat Point Element (CPE) for finite deformation elasticity.  In contrast with standard finite element procedures, the CPE approach treats the element as a structure and proposes a strain energy function that ensures positive stiffness to all inhomogeneous modes of deformation.  This leads to a CPE that does not experience hourglass instabilities exhibited by elements in commercial codes.

I intend to do some tensile testing on some composite materials with very small thickness (about 0.5-1mm) and size 3 cm x 1 cm in a temperature ramp mode. I would like to know the name of such a testing machine or contact if any one has the same?

An engineer position is available for PhD graduates from the areas of solid mechanics at the Houston area. Abilities of design, experimentation, and good communication skill are required. Please contact zyong1510@yahoo.com if interested.

 Dear Friends,

I'm using *SURFACE BEHAVIOUR option with PRESSURE-OVERCLOSUR E=EXPONENTIAL for my door analysis.

I have used c0=.01 and P0=1 in 1st case

and c0=0.01 and P0=100 in 2nd case

and getting different displacement value at the loading nodes.

So anyone tell me the significance of both the runs and which result i assume to be close to the real.

And if i have removes the PRESSURE-OVERCLOSUR E relationship then my run terminates with the error of convergence problem.

Plz help me out.

We have an opening for a post doctoral associate to work on biomimetic fibrillar interfaces.  We are seeking a person with skills and interests in mechanical testing and microfabrication, and background in contact and fracture mechanics.  The work will be in the group of Anand Jagota at Lehigh University in collaboration with the group of Herbert Hui at Cornell University.   Please contact either Anand Jagota (anj6@lehigh.edu) or Herbert Hui (ch45@cornell.edu) if you are interested.

Dear Sir/ Mam,

I am a Diploma holder in Mech. Engg. with 10 years experience in QC and 4 years experience in drafting.

          I have already completed a course in AutoCad 2000 in 2D and 3D. I am interested in persuing course in CAD/ CAM/Pro - e. Please guide . Please give details of institutes in Kolkata offering the said courses. Thank you

Hi.

This is a simple question about defining material properties of a plastic I guess.

I have a value for tensile & compression strength and have to include this in my model, alongside the modulus & poisson ratio. I use *Elastic for modulus & poisson, but I don't know which card to use for tensile & compression.

Have already checked the manual, but the search 'tensile compression strength' leads me to the Hashin criteria page, which is not suitable for my material.

Can anyone help?

Thanks in advance,
jo

An intensive metal plasticity/viscoplasticity literature review is needed, with drawbacks and capabilities of different models. Any found previous work?

I am working on 3d elastostatics with the BEM (boundary element methode), and want to know the different thechnics to treat singularities of the kernels.  I want to know if there is a BEM source code available in the net.

I'm working on modeling of mechanical properties of polymer based nanocomposites with clay.I have prepared a code for distributing plat like particles in polimar matrix (preparing RVE) with ABAQUS. I saw DIGIMAT software by www.e-xstream.com Company in internet some times ago. Now I want to test accuracy and application of this software one my project. I want to know if anyone in this club has had worked with this software and so if any one can provide me with a link of academic version of this software for a while.

Hi, my name is christian wijaya. I'm the student of Diponegoro Unversity in Indonesia. I'm on the last term now, i'm doing my final project. I study gust load alleviation with active control. I'm having much interest of mechanical vibration, aeroelasticity, aeroservoelasticity and smart structure. and i've been searching a chance to continue my study entering MS degree and expecting to get the fellowship or research assistanship.

please give me an information and see my CV attached below.

There is a potential opening for a graduate student research assistantship in Department of Mechanical Engineering, at The University of British Columbia, Vancouver, Canada. Interested students with strong academic background with interest in theory and experiments in the areas of dynamics and vibrations, applied (solid) mechanics are encouraged to apply. Initial queries to be addressed to Srikanth (spa21@bath.ac.uk).

Hello,

I have a question, can anybody tell me in determining the SIF using domain form, How can I determine the domain A and what are the factors which determines the radius rd about crack tip for the determination of domain A.

 thanks

We are pleased to inform you that Ebatco’s Nano Analysis and Testing Laboratory (NAT Lab) now is open to serve your nanoscale mechanical and tribological testing and analysis needs. The NAT Lab’s staff scientists have more than 10 years of nanomechanical and nanotribological testing, applications R&D and instrument development experience. The lab is equipped with state-of-the-art nanoindenters with nm-resolution in-situ SPM imaging capability and full lines of advanced options such as nanoDMA, modulus mapping, feedback control, heating/cooling stage, vacuum chuck, and environmental control and isolation chamber.

Several postdoctoral and PhD research positions are currently open in the Advanced Computational Technology (ACT) group at the University of Pittsburgh for the following research projects in the multidisciplinary areas of computational nanomechanics, bio-nanotechnology, renewable energy, and nanomedicine:

I am currently simulation arc welding process. i have performed plate butt welding using abaqus software. Dflux subroutine was used and the heat source model i used is goldak double ellipsoidal model.

Now i want to apply this technique to the welding of pipes, but currently i am having difficulty with the nodal coordinates. I have defined my glodal CS to cylindrical coordinate system in part and assembly defintion. But after generating the mesh the input file contain nodal coordinates in cartesian coordinates.

My question is what is to be done to get the nodal coordinate in cylindarical form (R, theta, Z) or is there any transformation command in abaqus that i can apply.

I have one solid Y-strucutre model which i have modelled as assuming beam model in NASTRAN. From NASTRAN i am extracting internal loads (Nodal forces and Nodal Moments) successfully and then i am doing the strength analysis of perticule section by using internal loads. Now i have model the same structure using 3D solid finite element model by assuming Tet Mesh under ABAQUS. Analysis was running perfectly in ABAQUS. Now my problem is how to extract the internal loads from the 3D solid Tet mesh model for the same section. I need help to extract the internal loads from the solid Tet mesh. Please help me i am right now stuck at this point.

Materials design principles of ancient fish armour

Benjamin J. F. Bruet, Juha Song, Mary C. Boyce & Christine Ortiz

Abstract :

The number of registered users of iMechanica passed 8000 this afternoon.  The total number of posts is 3622, and the total number of comments 8429.  The total number of hits was 3.4 millions in March, 5.6 millions in April, 2.4 millions in May, and 2.7 millions in June.