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Journal Club Theme of July 2015: Reconfigurable metamaterials -- putting the holes in the right place

Reconfigurable metamaterials -- putting the holes in the right place

 

Shu Yang1 and Jie Yin2

1Department of Materials Science and Engineering, University of Pennsylvania, E-mail: shuyang@seas.upenn.edu

Mario Juha's picture

Large-eddy simulation with near-wall modeling using weakly enforced no-slip boundary conditions

In the present paper, weakly enforced no-slip wall boundary conditions are revisited in the context of Large-Eddy Simulations (LES) with near-wall modeling. A new formulation is proposed in the framework of weakly enforced no-slip conditions that is better aligned with traditional near-wall modeling approaches than its predecessors.

Opening for new Ph.D. students in the Computational Mechanics group, The University of Iowa.

The Computational Mechanics group at The University of Iowa, led by Professor S. Rahman, is looking for new Ph.D. students, who are capable of and interested in performing high-quality research on engineering design. The research, supported by National Science Foundation and others, entails building a solid mathematical foundation, devising efficient numerical algorithms, and developing practical computational tools for stochastic design optimization. A substantial background in solid mechanics and structural optimization is a must; exposures to stochastics and probabilistic methods are highly desirable.

If you are interested in pursuing a Ph.D. degree at Iowa, please contact and send a resume to: Professor Sharif Rahman at sharif-rahman@uiowa.edu. Please note that we are interested in students who already have M.S. degrees in engineering or mathematics. The desired start date is Spring 2016 or sooner.

Manipulation of SDV in VUSDFLD subroutines

I am trying to write a subroutine with VUSDFLD

I would like to manipulate the Solution Dependent Variables based on its previous value as follows:

Statenew(k,2)=Stateold(k,2)*10

But Multiplaction and Divisiion operations do not give any results. They give 'No value' when they are output.

Would anyone know why this happens?

 

Thank you.

Career perspectives in the field of "porous media"

Hi everyone,

 

 I was wondering what the career opportunities would look like after getting a PhD in numerical simulation of porous media. Besides a research job in universities, what other possibilities are there? Would industry also be interested in such specialization and if yes in which sectors?

 

Thank you for your opinions.

Setareh

Payam Soltani's picture

NONLINEAR VIBRATION ANALYSIS OF SINGLE-WALLED CARBON NANOTUBES BASED ON THE NONLOCAL SHELL ELACTICITY THEORY

 

NONLINEAR VIBRATION ANALYSIS OF SINGLE-WALLED CARBON NANOTUBES BASED ON THE NONLOCAL SHELL ELACTICITY THEORY 

By Payam SOLTANI, Javad SABERIAN, Roja BAHRAMIAN

Abstract:

Nonlinear Programming in Matlab or Python

Please someone can guide me starting programming hints and guidance in nonlinear solid and structure. Please mention me some available computer code regarding solved example problem e.g. a computer program of elasto-plastic analysis of plane stress problem using matlab or any other language. I am following Klaus Jurgen Bathe Book.

Laser Welding Simulation

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Hi all,

        I am trying to simulate the laser welding of butt joint in ANSYS to find out the residual stress after the welding. Can anyone help in modelling the welding process in any way like suggesting the basic important literature and how to model the moving heat flux. Do we need to define the elements at the bead in modelling the welding proicess?. In laser welding we dont have the filler material in that case how those plates are joined in simulation?.

Is there any kind of tutorial available in ANSYS to model the welding process.

 

how to find parameters in cohesive surface?

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Dear all,

I am working on micro mechanical modeling of metals. I just have some questions that I am wondering if anyone can help me by answering them.

1. I know that for cohesive element , it is important to have the match meshes in boundaries of the surfaces but my question is that is it also important to have match meshes in boundaries when we define surface base cohesive? 

2. can any one tell me that how I can find the the values that I need to define cohesive surface? I mean:

Cohesive zone method(czm)

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Dear all,

I want to define cohesive surface in my model which is a polycrystalline of Titanium with its grains. Can anyone help me that How I should find the appropriate values for fracture energy and mode mix ratio 1 and 2?

For damage initiation, what do I consider for normal, shear 1 and shear 2 in contact property of interaction module? Are Tensile and shear strength suitable for these properties?

Thank you

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