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Water Content In Exhaust Gas (Diesel Fuel)

Submitted by santhosh2885 on
research
Hi everyone,



I would like to know if anyone would be able to help me calculate(or measure) accurately the Moisture Content / Water vapour content in the Exhaust Gas of an Engine.
I wish to determine the components of the Exhaust Gas for a Combustion Chamber(so that I am able to calculate the Gas Constant of the Exhaust Gas) and
 I have been able to measure the values of Oxygen(in %), Carbon di oxide(in %), Carbon monoxide(in PPM), NOx (in PPM).

The Idaho National Laboratory has an opening for a Postdoctoral Appointee in the area of laser-based characterization of mechani

Submitted by Vanessa Van Dyk on
job

The Idaho National Laboratory has an opening for a Postdoctoral Appointee in the area of laser-based characterization of mechanical and thermal properties.  This position is co-sponsored by the Fuel Cycle Research and Development program and the Center for Materials Science of Nuclear Fuel.  The candidate must have completed a PhD degree in Materials Science, Physics, Mechanical engineering or a related field.  The candidate should have a strong background in the development of continuum based models and/or a strong background in optics.  The main objective of this proje

Warpage Measurement of PCB With 3D Profilometry

Submitted by NANOVEA on
industry
warpage
flatness
bowing
planarity
profilometer

Flatness measurement of electronic parts and assemblies, or PCB’s, has become increasingly critical as geometries become smaller: finer pitches, smaller solder ball volumes, thinner substrates, etc. Additionally, processing temperatures vary and can play a major role in PCB warpage and or planarity defects. As a result, accurate flatness measurement, using a profilometer,  has become vitally important to warpage characterization and planarity measurement.

Charpy Vs Gardner test

Submitted by priyadd84 on

Hi ... what is the difference in functionality between charpy (a simply supported specimen(notched/unnotched) is hit by a swinging pendulum)and gardner test (a simply supported specimen(notched/unnotched) is hit by a vertical free falling mass guided by rails) .... 

1.What is the loading pattern in the point of contact between the specimen and the setup?

2.Why fracture pattern varies between the two test setups for similar specimen with same impact velocity, Which parameter is responsible for the variation in fracture type.  

Crack length in fracture mechanics

Submitted by manooir on
research
Crack length

Hi,

I have modeled a beam with a hole in it in ABAQUS. I use of FRACTURE MECHANICS and FINITE ELEMENT METHOD for perdiction of failure load of beams with holes. I am wondering is it a correct assumption to assume a fixed crack length for one beam with varying hole position or not? 

It have assumed that a fixed crack length for a beam with varying location of hole along the beam.

Am I correct?

Thank you,

Manooir

SIMULIA announces new features in Abaqus 6.10

Submitted by Kewei Li on
software
ABAQUS
simulations
finite element methods
Fluid-structure Interactions

For those of you looking for FSI simulation on Abaqus platform, recently Simulia has announced the new features in release 6.10, which introduces the capability for performing Computational Fluid Dynamics (CFD) simulation.
So it enables users to perform coupled physics simulations with
Abaqus/Standard and Abaqus/Explicit, such as fluid-structure
interaction between human tissue, a medical device, and fluid flow, more information:

http://www.simulia.com/news/pr_100524_DSS.html

 

Stiffness of a beam

Submitted by parisa on
research
stiffness

Hi,

As a part of my research, I would like to break down a simply supported beam to two beams shown in the attachement.  I expect to remove the bond and use of springs for transforming deformation of upper beam to lower beam. What could be the stiffness of springs which could be used in new model?

Thank you for your comment,

Parisa

 

crack closure tip model

Submitted by uni_students2009 on
Hello, my question meaning that developed crack closure model can be explained the damage interaction among cycles of loads, is it right that each cycle has a own damage how can interpolate the overall dame in realistic as possible? which model do you suggested that can be contribute in this issue consider crack closure model?

orientations of plies of composite plate in LS DYNA

Submitted by nazmtech on
LS DYNA

hello im a M-Tech student..i need  help regaring LS DYNA.i want to model a composite plate with the orientations[0/45/-45/90] i want apply the orientations and how to view the orientations of the plies. and i want know how to predict delaminations when it is impacted by a rigid ball...in LS DYNA..plz help me out

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