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Flow Rate through a gas pipe

Submitted by BobbyBob on
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Hi I'm trying to work out the following problem

The pressure at the start of a 180Km stainless steel natural gas pipeline is 4MPa and at the end is 2MPa.  If the diameter of the pipe is 0.4m, what will be the gas flow rate through the system? (ignore losses other than friction)

(for natural gas, density = 40 Kg/m3, viscosity = 11x10-6)

This is from an exam paper and at the end of the paper there's a moody diagram with roughness values, the closest to stainless steel is commercial steel and has a k value of 0.045 mm.

I want to choose a book on Tensor Analysis

Submitted by xiashengxu on
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Tensor analysis is a very useful tool for continuum mechanics as well as other courses. I wonder which book is best for me. 

I have background of anvanced mathematics, linear algebra.  The book should be comprehensible.

Help modeling a viscoelastic material in Abaqus

Submitted by Arnold Feng on
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abaqus indentation viscoelastic

Hello,

I'm trying to model indentation of a viscoelastic material in Abaqus.

I have (1) stress-relaxation curves for the material and (2) force-displacement curves for the material from a real indentation experiment.

From this I can readily calculate the elastic modulus (infinite) and the elastic modulus (instantaneous) for the material.

I'd like to fit a Prony series based on this data that I can enter into Abaqus to model the material.

How would I go about fitting the Prony series from the force-displacement and stress-relaxation curves?

how to show the stress in the thickness direction when you use the shell element with abaqus

Submitted by hua_2001 on
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stress
ABAQUS

hello,

  •      i simulate some process using shell elment, i find the results have big difference between abaqus and lsdyna. the abaqus results always show the stress in the thickness direction is zero. but the lsdyna is not. i don't know why? if some one know that, please give me some suggestions. i heard that the abaqus can not show that stress component. if not, how can i do to calculate that and fill it into the results file (.fil file). thank you!

 

Problem with my Abaqus Double Layer Composite Identation Simulation

Submitted by cvs599 on
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Hi everyone,

 

I currently using Abaqus/CAE 6.8. I currently doing my final year
project about indentation test on double layer composite material. The
top layer of the material is Pasta (elastic) and bottom layer is Gel
(hyperelastic). I manage to simulate the model and completed the
process. The stress of the Gel does not change as it undergoes
deformation. As shown in the clip i attached. Any idea to solve this
problem? Any suggestion is welcomed.. Thanks

Right click the indentation.jpg and save target as....

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