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Announcement on Deadline of The 5th IFAC Symposium on Fractional Differentiation and Its Applications

The Fifth IFAC Symposium on Fractional Differentiation and Its Applications - FDA12


May 14-17 2012, Hohai University, Nanjing, China
Website
http://em.hhu.edu.cn/fda12/

 

Yong Zhu's picture

Size effects on elasticity, yielding, and fracture of silver nanowires

This paper reports the quantitative measurement of a full spectrum of mechanical properties of fivefold twinned silver (Ag) nanowires (NWs), including Young’s modulus, yield strength, and ultimate tensile strength. In-situ tensile testing of Ag NWs with diameters between 34 and 130 nm was carried out inside a scanning electron microscope (SEM). Young’s modulus, yield strength, and ultimate tensile strength all increased as the NW diameter decreased.

Yong Zhu's picture

Buckling of Aligned Carbon Nanotubes as Stretchable Conductors: A New Manufacturing Strategy

We systematically investigated the interesting electric response of the aligned CNT ribbons under mechanical strain. We found that CNTs slide on a PDMS substrate under tension, but buckle under compression (releasing). Such an irreversible mechanical deformation is responsible for the observed irreversibility in the electric resistance upon the first stretching/releasing.

Postdoctoral Position at Cornell: Modeling the Chemo-Mechanics of Deformation and Fracture via a Concurrent Multiscale Approach

A postdoctoral position is available in the Computational Mechanics and Materials
Group within the School of Civil and Environmental Engineering at Cornell
University (http://ceeserver.cee.cornell.edu/dhw52/index.shtml).
The project will involve the application of ab-initio atomistic modeling
techniques to illuminate the mechanisms by which impurities and environment
influence the mechanical failure of engineering materials.

Lifeng Wang's picture

One PhD Position Available in Mechanics of Materials

One PhD position is available immediately in the Department of Civil & Environmental Engineering at Clarkson University, NY, US.  The research program focuses on the mechanical behaviors of advanced materials including polymer microstructures, composites, nanomaterials, and biological materials. Interdisciplinary collaborations are possible. The candidates with background and interest in engineering mechanics, solid mechanics, and materials science are highly encouraged to apply.

Raihan.Rumman's picture

Presentations on Rare Metal Required

I was looking for some decent presentations on Rare Metals, and was at a loss in finding some. It would be great if anyone could direct me to anything related to rare metals, especially on presentation form. My email is rummantdm@yahoo.com.

Regards

Raihan Rumman

Researcher

Kongju National University, South Korea 

Nanoindentation: Oliver & Pharr Analysis

Dear Members,

I am very new to field of nanoindentation and my question might appear too simple.

I am indenting an elastic - plastic material (polymer blend) with spherical indenter. I am well verse with hertz contact mechancis theory and indentation theories like Oliver & Pharr, JKR, DMT and few others.

Scholarship Support for Attending NSF Workshop on the BEM: Bridging Education and Industrial Applications

Sponsored by the National Science Foundation and the NSF Institute for Mathematics and its Applications, the University of Minnesota (Minneapolis, Minnesota, USA) is hosting a workshop on the boundary element method (BEM) April 23-26, 2012. This workshop consists of a two-day short course and a two-day colloquium on advances in the BEM with educational and industrial applications. Researchers and engineers from around the world, as well as students (both graduate and undergraduate) are invited to participate in this workshop.

profilometer's picture

Profilometer software for NDT surface roughness inspection

Novacam 3D Profilometer Software

The Novacam three dimensional software programs are used with all Novacam Profliometers. The program permits the consumer to define how big the region, or line to be measured, along with the lateral resolution from the measurement.

Novacam's high end Data Acquisition Profilometer Software programs are incorporated with all of MicroCam non-contact profilometers.

profilometer's picture

Profilometers using Low Coherence Interferometry used by NASA to measures thickness

Using a fiber-based optical profilometer NASA measures the thickness of liquid nitrogen in cryogenic chambers at its Propulsion Systems lab because these profilometers use fiber-based probes which can withstands the extreme environment, can be located hundreds of meters away from the interferometer and fit in the tight chamber which standard full-field profilometers with a human operator could not. The signal quality stays constant over the distance.

M. Jahanshahi's picture

Derivative of Metric Tensor

Hi All,

How can we compute the derivative of metric tensor on one manifold with respect to metric tensor on another menifold?

Regards

Mohsen

Nonlinear static in SAP 2000 (Problem with hinges assignment)

Hi everyone,

Currently I am working with nonlinear static pushdown analysis in SAP 2000. I understand that when the analysis gives a warning 'unable to find a solution at step 20' means that the assigned hinges are compete to unload i.e where one hinges requires the applied load to increase while the other requires the load to decrease.

My question is, how are we going to overcome this warning?..Is there any better solution for this?

Looking forward for anyone to reply.

Best Regards,

Hazrina Mansor

how to mesh two sucessive volumes with different meshing

how to mesh two sucessive volumes with different meshing

i've modeled a column as a volume

i need a closer or finer mesh near the junction of beam

anyone pls guide me on this issue???

RBF in meshless method

Free Tags: 

Can anyone recommend books or papers that use RBF in meshless method? I will like to know more about how to use RBF in meshless methods to solve PDE. Matlab code on this subject will also be appreciated. 

rajeshpnair's picture

looking for an important journal paper in DEM

Can anyone send me the paper by P A Cundall and RD Hart.Title of paper is NUMERICAL MODELLING OF
DISCONTINUA.It came in Engineering Computations journal paper (1992).I need it for my research work. thank you. rajeshpnair@gmail.com

ANSYS Meshing Problem

Hi I am currently using ANSYS 13 Workbench to do FEA on .igs files of leg bones (femur, tibia, and patella), I am new to ANSYS and I am having trouble meshing the bones. I am able to mesh the bones individually however when I import the whole leg assembly (assembled in proENGINEER) it will not mesh. Does anyone know how I can fix this?

 

 

Post-doctoral Position in the Ohio State University

Post-doctoral position is available in the area of ultrasonic material characterization and nondestructive evaluation (strong background and experience in ultrasonic experiment and modeling are required). The position is supported from research grants. The focus area is ultrasonic study of nonhomogenous materials like polycrystalline materials, composites and adhesive bonds. State of the art ultrasonic laboratories and other characterization facilities are available. More details will be provided to interested individuals.

Interested candidates should contact

Jianliang Xiao's picture

ASME IMECE 2012, “Mechanics of Adhesion” symposium

Adhesion has long been an important issue for mechanics and
many other disciplines. Its influence spans macro-, micro-, nano- and molecular
scales. When size goes down, adhesion plays a more and more significant role.
Many important technologies attribute to adhesion, such as transfer printing
for advanced microfabrication, super adhesives inspired by gecko foot hairs,
and self-assembly. Adhesion also has strong implications on the behavior of
nanomaterials (such as nanotubes and graphenes) and biological systems (such as
cells). This minisymposium "Mechanics of Adhesion" is to provide a

Cam Follower Mechanism and energy efficiency

You can see practical model of cam follower mechanism for clean energy.
Follower move little bit and help cam to rotate 6 times more peripheral
length. Cam can rotate 360 degree using two followers. You can get full
research at my blog at

http://energyefficientmechanism.blogspot.in/2009/04/mechanism-to-increas...

 

jsrivas's picture

The Cost of Knowledge

http://thecostofknowledge.com/

If research projects are funded by public money, shouldn't their
results be available to the public at a reasonable price? or even free
of charge?
To prevent the monopolization of the scholarly record, read, think, and, hopefuly, support this cause. It is all I ask.

Modeling of reinforced concrete joint with ansys

 I want to model reinforced concrete beam- column joint in ansys software.i choose the solid 65 for concrete and link8 for steel.

how can i model the stirrups?

 

cmksiva's picture

Central Differnce operator in abaqus 6.11

Dear All,

Please explain me what is central differnce operator, what is the role of central differnce played in Abaqus/Explcit analysis

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