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Saint-Venant’s Principle and Its Proof : History and Review

Submitted by Jian-zhong Zhao on
research

In this article the history of development of Saint-Venant’s Principle is reviewed, referring to the most important events concerning the principle as the historical clue, and the important works and results are evaluated; the view-points that Toupin Theorem can not be considered as a mathematical expression of Saint-Venant’s Principle and that the general Saint-Venant’s Principle does not stand, but modified Saint-Venant’s principles can be proved true are published and explained; the mathematical approaches for eslablishing modified Saint-Venant’s principles are summarized; the significan

FRP using shell 99

Submitted by omaromar on
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shell99
FRP

hi everyone,           i attached FRP strip and u-wraps to the concrete beam. i simulate it in ansys using shell 99 for FRP strip and uwraps. but i have a problem that the beam behaves as if the FRP does not work, and the failure load is as the same for the beam without FRP. however i merged the joints between FRP strip and uwraps and the concrete joints. i hope if somenone knows the reply, i need this reply very soon.  thank you so much for cooperation.

Scaling dynamics of seismic activity fluctuations

Submitted by Balankin on
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Seismology
Time series analysis

We study the dynamics of the seismic activity in Mexico within a framework of dynamic scaling approach to time series fluctuations, recently suggested by Balankin (Phys. Rev. E, 76 (2007) 056120).We found that the relative seismic activity and the long-sampled fluctuations of seismic activity both display a self-affine invariance within a wide range of consecutive seismic evens.

Topological crossovers in the forced folding of self-avoiding matter

Submitted by Balankin on
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Forced folding
Topological crossover
Fractal dimension
Scaling

We study the scaling properties of forced folding of thin materials of different geometry. The scaling relations implying the topological crossovers from the folding of three dimensional plates to the folding of two-dimensional sheets, and further to the packing of one-dimensional strings, are derived for elastic and plastic manifolds. These topological crossovers in the folding of plastic manifolds were observed in experiments with predominantly plastic aluminum strips of different geometry.

interface

Submitted by alokgautam on
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Fluid Mechanics Forum
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Dear friends,

 

I want to find liquid and gas interface at the edge of the cube but I do not know how to do it. I know how to solve in on surface but I an unable to solve it at edge of cube. If any of u have knowledge please give me some suggestions.

 

alok

Abaqus: How can I fix the center of a gear? - Please Help!!

Submitted by zeke2282 on
research
ABAQUS

Hi,

I´m trying to simulate the contact between two gears. Each gear has 60 triangular tooth and all of them are in contact at the same time. 

I have one external gear and one internal gear. The internal gear is driven by a torque applied at it center. 

I know that I should fix the center of the gear but I don´t know how to do it with Abaqus. Ive started to use two weeks ago.`I´ve already done the tutorials and reading the Manual!.

Please Help me!!

 



Best wishes

Static Load in ABAQUS Explicit

Submitted by MitsosOSougias on
research
ABAQUS

Hello,

I have to do a simulation with two loads, a constant static load and a dynamic load that rapidly decreases. What is the best way to handle this? Should I create two steps one for the static load and one for the dynamic load and let the static load propagate, or should I just have one step where the static loas acts instantly and the dynamic follows an aplitude?

The problem with the two step idea is that when I create the static load as static, I cannot get the choice of Dynamic/Explicit on the creation of the next step.

Any ideas

moving heat sourse (laser) in ansys

Submitted by ostwals on
research
moving heat source

hi everybody ,

i m quite new wd the ansys ,and was trying to simulate a problem of moving heat sourse  (laser )

laser is having a gaussian beam distribution and has to move wd some velocity over a face of the plate .how could i model heat distribution of the laser and how coulad i move it wd some velocity.. 

i hope i m clear,plz help me out. 

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