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Eartquake analysis

Submitted by SivaSrinivasKolukula on Thu, 12/03/2009 - 10:37

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Accelograms

When I was going through few research articles related to earthquake analysis, they say: A compuetr code was developed where in which the eartquake input will be in either accelerogram or a displacement time history, digitized in in the appropriate format. What does it mean? Doest it mean that in studying simulation of seismic analysis we need to load that code as input? How to get an idea about that codes? Where to get? How to use?

Please help.........

Thanks in advance........

Nondetermistic material models

Submitted by edub on Tue, 12/01/2009 - 10:10

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I am currently working on design optimization of nondeterministic systems and
would like to find realistic tolerances for the values of material
properties. Does anyone know of a (standard) reference for material
values that is probabistic or at least shows a range of values?

PLATE WITH CRACK

Submitted by psad@rediffmail.com on Tue, 12/01/2009 - 08:43

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vibration of plates

i have relations for tensile and bending stress in a rectangular plate due to a central surface crack for a constant thickness plate . i need to have these relations for a varying thickness plate . can any body help.

How to use ansys to model the tangential deformation of a rotating blade.

Submitted by julie liu on Tue, 12/01/2009 - 03:50

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Dear all,

I have one question here. A blade is mounting on a rigid disk's outer rim. The disk is rotating at a variable angular speed. The system is used to model a turbine wheel with a blade mounted on it when the engine is ramping up or shuttng down.

The thing I want to calculate is the blade tip deformation in tangential direction during this engine ramp up -steady state -shut down process. Does anybody know how to use ANSYS to model it?

Publicly-available fatigue test data

Submitted by Mike Graham on Mon, 11/30/2009 - 16:43

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Fatigue

experimental data

Can anyone help point me to publicly-available fatigue or fracture test data? I am interested in obtaining a variety of data for statistical processing. It seems many authors have used the data collected by Virkler and Hillberry which seems to be widely used, but I have not found raw data for their tests so far; is this data available somewhere for me to use? Any help is very appreciated.

Meshfree Code.

Submitted by moorekwesi on Sun, 11/29/2009 - 02:31

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Matlab

Hello,

i just started reading Meshfree and will love to see a matlab code for it,may be for a simple Poisson Eqn.

To serve as a guide.

Thank you

Help needed with interpretation of received P h curves during NANOINDENTATION

Submitted by Anna Dolgran on Fri, 11/27/2009 - 12:58

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nanoindentation

elastic modulus

Dear iMechanicas,

I just started doing nanoindentation tests on dry biological samples (wood) with a flat punch tip and I have problems analyzing the results! I would be happy if anybody could give me some suggestions.

While running a test I receive quiet good force-displacement curves (no adhesion, good surface find, no time-depend behavior) but the values for the recieved elastic modulus are not stable! The value scatters over the whole range of displacement.

Meshfree model of shear at two-layer material interface

Submitted by Olumide on Thu, 11/26/2009 - 16:49

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Hello IMechanicans,

I am interested in modelling shear response to mechanical stress at the interface of a two layer matrial e.g. the skin of the human hand, where the superficial layer of tissue slides over the deeper layer, while retaining some sort of attachment to it.

Does anyone know of any research papers that have investrigated this topic? I would rather base my work on the advances made my others, instead of reinventing the wheel.

Thanks,

- Olumide

simulation a free turbulent jet flames to air atmosphere with Fluent6.3

Submitted by P.Omidian on Wed, 11/25/2009 - 11:12

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well blowout

Hi, everyone:

I am trying to use CFD to simulate a lifted free jet with/without combustion to air atmosphere.I am using Fluent6.3 to find its velocity,pressure and temperature distribution in the air.

My settings of model are:

ALE (Arbitrary Lagrangian-Eulerian) mesh adaptivity in ABAQUS/Standard

Submitted by Youssefans on Tue, 11/24/2009 - 05:32

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Dears,

I'm doing some numerical analysis on penetration of infra-strucutres on soils (such as CPT tests) in ABAQUS/CAE .. what I'm recently challenging with is to overcome the element excessive distorsion due to large deformations... I have to apply contact constraints in my model...I would appreciate it if you share your expriences with me regarding the following tips:

1- Is it possible to use the ALE (Arbitrary Lagrangian-Eulerian) mesh adaptivity in ABAQUS/Standard? If yes, do you know of any accessible examples (.cae files) or references?

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