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Modal analysis of a Gas turbine matrix burner using ANSYS

Submitted by enerjit on Wed, 11/19/2008 - 12:37

Hi, dear friends,

I am new to i-mechanica and working for a reaserch institute for steam and Gas turbine in Aachen,Germany. I am doing Modal analysis of a Gas turbine matrix burner and want to find out the diffrent mode shapes and the frequency. My problem is, I want to impose a temperature field of round about 1800°C which I will extract from CFD results. SO I would be grateful if any one can tell me how can I impose temperature field to get this modes and frequency because this things are influenced by temperature.

Have a nice day

Mechanical properties of functionalized carbon nanotubes

Submitted by Zuoqi Zhang on Tue, 11/18/2008 - 02:56

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carbon nanotubes

mechanical properties

functionalization

Kidus

Submitted by kidus on Sat, 11/15/2008 - 12:57

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Moving mesh in ABAQUS

Hi,

I am uisng ABAQUS 6.7/Standard to simulate gear pairs (only static). At a moment I am only taking 2D, so I am using plane strain with quad elements. My problem is how to chnage the mesh refinment with respect to the gears postion, specially on the contact area?

Thank you in advance for any help

Does the J-integral method for energy release rate require a small displacement assumption?

Submitted by josh6930 on Sat, 11/15/2008 - 02:16

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As I understand it, there are many geometries for which the j-integral has been found to give useful simplifications when evaluating the energy release rate. Many of these geometries seem to require small displacements. I would like to know if the small displacement requirement is necessary for the contour integral before any simplifications are made or if small displacements are only necessary because the large deformation geometry of some specimens conflicts with those simplifications.

Second law of thermodynamics and Configurational Mechanics

Submitted by Malik Ait-Bachir on Fri, 11/14/2008 - 18:17

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configurational mechanics law of thermodynamics

Hello,

I have been reading up a lot on "Configurational Mechanics" and frankly i came up with a lot of questions. I am not skeptical at all about it, it just that many things are not clear to me.

Effect of Residual stresses on the Interfacial Fracture Toughness of polymer/Metal Interface

Submitted by shirangi on Fri, 11/14/2008 - 17:46

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fracture toughness

When a bi-material sample for the characterization of interfacial fracture toughness is manufactured, the sample is not usually stress-free at room temperature. If an interface between a metallic substrate and a polymeric adhesive is considered, there are essentially two sources of residual stresses for a dry sample at room temperature:

1- The mismatch between the Coefficient of Thermal Expansion (CTE) of adhesive and substrate induces a concave or convex warpage, depending on the CTE values of the two materials.

abaqus

Submitted by MEF021 on Fri, 11/14/2008 - 15:35

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ABAQUS

salut, je veux des docs que m'aide à maitriser le logiciel ABAQUS, est ce vous pouver m'aider,,, merci d'avance

workbench

Submitted by 501675891 on Fri, 11/14/2008 - 13:32

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hi,

i am satish. i am trying to calculate interference stress in interference fit with following dimensions.there is a difference b/w analytical and simulated results. here i am giving dimensions kindly inform to me the values of von misses and pressure at intereference.

shaft od=938.7378, core id=937.8, and core od=1138.2

E=2.1e5,m=.29and coe.of friction=.14

please... help me...

Thanks

satish

JOURNAL CLUB DEC 1 08: CYBER-ENABLED PREDICTIVE SCIENCE-BASED CONTINUUM MECHANICS FOR MULTISCALE FRACTURE PROCESS DISCOVERY

Submitted by Wing Kam Liu on Thu, 11/13/2008 - 22:40

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The key to developing materials against failure under extreme environments is the understanding of the interplay between the various physical scales present, from the atomic level interactions, to the microstructural composition and the macroscale behavior. The ability to do this requires new methods that can be used to predict macroscale properties accurately based on microstructures and nanostructures without resorting to empiricism.