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On the modeling of asymmetric yield functions

Submitted by Stefan C. Soare on

In the context of metal plasticity, the yield function of a metal polycrystal is its most complex macro-characteristic. Letting aside the questions of kinematic or distortional hardening, the basic problem is geometric in nature: to design a family of convex surfaces capable of reproducing a wide range of experimental, or theoretically predicted data. While many satisfactory solutions have been proposed for the modeling of symmetric (with respect to the origin of the stress space) yield functions, the more general case of asymmetric functions has not witnessed comparable progress.

IMECE 2015 Symposium on "Mechanics of Deformation and Failure of Energy Materials"

Submitted by Siva P V Nadimpalli on

Dear Colleagues,

We invite you to submit an abstract to the symposium titled “Mechanics of Deformation and Failure of Energy Materials” at the IMECE 2015, Houston, Texas, November 13-19, 2015. 

More details about the symposium and the abstract submission can be found in the attachment and at the Congress 2015 website http://www.asmeconferences.org/Congress2015/. Abstracts are due on March 2, 2015 and please select Track 12 -37 while submitting the abstract.

Michael Ortiz will receive the 2015 Timoshenko Medal

Submitted by Anonymous (not verified) on

Michael Ortiz will receive the 2015 Timoshenko Medal.  He will give the speech of acceptance at the Annual Applied Mechanics Banquet, on Tuesday, 17 November 2015, in Houston, at the ASME International Mechanical Engineering Congress & Exposition.  

Come to the Congress to congratulate Professor Michael Ortiz in person.  

The deadline for submitting an abstract to the Congress is 2 March 2015.

Is energy conservation satisfied in the current deformation application schemes in molecular dynamic simulations?

Submitted by Fan Yang on

In our recent paper, we examined the energy conservation for the current schemes of applying active deformation in molecular dynamics (MD) simulations. Specifically, two methods are examined. One is scaling the dimension of the simulation box and the atom positions via an affine transformation, suitable for the periodic system. The other is moving the rigid walls that interact with the atoms in the system, suitable for the non-periodic system.

analysis Composite at Abaqus

Submitted by hamed z on

Hi every one

I try to analysis my Model at Abaqus. I want to use continume shell model to create the composite layer. The model shape is so complex and I can not use Hex meshing. Abaqus just meshing the model as Tetra element. And my problem is abaqus do not accept tetra az composite layer at element type. I try to daturm the model very smal part until may be can define hex element but its not work. There is any way I can use tetra meshing for continume shell.  

Call for Abstracts [USNCC13]: Multiscale Modeling and Simulation of Fracture and Damage in Quasi-Brittle Solids

Submitted by Ahmed Elbanna on

Dear all,

 

We would like to draw your attention to the following minsiymposium on multiscale modeling of fracture in quasibrittle solids that will be taking place as part of USNCCM 13 to be held at San Diego [July 26-30]. For those who are interested in submitting an abstract, the deadline is Feb 15th. Please feel free to pass this announcemnts to your colleagues or students whom you think may be interested. We are looking forward to seeing you there either in the audience or giving a talk!

Best Wishes,

 

Call for abstracts on Multiscale Modeling of Granular Materials, USNCCM 13 San Diego [July 26-30, 2015]

Submitted by Ahmed Elbanna on

Dear all,

We would like to draw your attention to the following minsiymposium on multiscale modeling of granular materials that will be taking place as part of USNCCM 13 to be held at San Diego [July 26-30]. For those who are interested in submitting an abstract, the deadline is Feb 15th. Please feel free to pass this announcemnts to your colleagues or students whom you think may be interested. We are looking forward to seeing you there either in the audience or giving a talk!Best Wishes,

Ahmed Elbanna (UIUC) and Waiching Sun (Columbia University)

PhD Position Available at University of Miami, USA

Submitted by e.celik@miami.edu on

Dr. Emrah Celik is looking for a PhD student with mechanical engineering background (or a related field) who will apply nanotechnology on bio-medical applications. The student will design the mechanical characterization systems, develop computer programs, perform atomic force microscopy (AFM) measurements and analyze data. The ideal candidate will have previous experience or motivation to learn nano-microfabrication, laboratory measurements and finite element analysis. Programming, design and machining experiences are also plus for this position.