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please help for postbuckling analysis in ANSYS

Submitted by Talha Ekmekyapar on
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postbuckling

I am trying to perform postbuckling analysis of plates in ANSYS. But something confuses my mind. After linear buckling analysis I use scaled firtst buckling mode shape to generate initial imperfections. Then I initiate nonlinear geometric analysis by NLGEOM command. Collapse load or final converged iteration changes according to NSUBST option. I am trying to give higher Substep to obtain more sensitive and reliable results like 10000. But NSUBST with 100 sometimes reaches higher loads than using 10000. Which one is a correct approach?

Could anyone help me?

In search of articles on mesoscale FE modeling of sintering

Submitted by Mikael Öhman on
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multiscale
finite element
sintering

Hi. I'm now starting my PhD on a project on sintering of hard metal.

I'm doing a literature study, but I have failed to find any articles that uses FE analysis on the micro/mesoscale. All of them seems to handle this only with a homogenized model on the macroscale.
If I get to be picky, I would prefer something with hardmetal, but at this point, anything would be great.
I would also be very happy to find any suitable reading on FE-analysis on solid-liquid-pore mixtures.

Looking for a postdoc on Laser Material Processing

Submitted by eforoozmehr on
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finite element modeling
Laser material processing
laser cladding
laser welding

I am already PhD candidate of Mechanical Engineering in Southern Methodist University, Dallas, Texas. I am looking for a postdoc position with an emphasis on laser material processing. You may access my CV by:

http://lyle.smu.edu/~eforoozmeh/CV.htm

 

Failure Surface Graphics in Stress Space

Submitted by Richard M. Chr… on
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 A new section has been added to the website on failure criteria for engineering materials.  This new work displays many different three-dimensional computer graphics of failure criteria surfaces in stress space. The full range of isotropic materials are covered from ductile metals to brittle ceramics and glasses and beyond.  All of these computer generated graphics can be seen at www.failurecriteria.com/failuresurfacegr.html.

 

abaqus vumat-excessive distortion

Submitted by pani3882 on
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Hi All



I am trying to implement a composite material model in vumat. So far, I
have been successful in getting the correct results for a cube for both
tension and compression with the cube being modeled with just one
element (C3D8R)



But when, i model the same cube (side 40mm) with 125 elements,
subjected to the same bc's, with the same material parameters, i get an
error that the element is undergoing excessive distortion.



I am specifying a density of 1.52e-9 ton/mm3.



MLPG

Submitted by sepehr on
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Hello, my MS thesis is development of MLPG to special plate problems,

I would be glad if you, dear friend, can help me by source code writen in MATLAB (even beam problems).

Thanks.

Effect of Fiber Geometry on Pulsatile Pumping and Energy Expenditure

Submitted by Arash_Kheradvar on
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Cardiac Mechanics

Myocardial fiber orientation is a topic that has recently received much attention in connection with cardiac pumping function. The twisting motion of the cardiac base to apex can be a direct result of this geometric orientation of these fibers. One important question that has not been addressed yet is whether there is any relationship between the contractile energy expenditure and the geometric orientation of myocardial fibers. In the present work, we study the effect of contractile fiber orientation on pumping function.

dynamic bending stress analysis in sandwich thin film structure

Submitted by Qiang Chen on
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thin film plasticity

Hello,

Does anybody know if there exists an analytical solution for stress distribution in a sandwich like/ multilayered thin films subjected to cyclic bending? The sandwich has line-patterned metal of submicrons in thick and a few microns in width, which was coated/deposited by other material on top and bottom (surrounding as well) with different thickness up to 20 microns.

 

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