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Note: This discussion is about an older version of the COMSOL Multiphysics® software. The information provided may be out of date.

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Second Piola Kirchoff stress vs stretch ratio plot in COMSOL

Posted 2011年12月22日 GMT-5 02:33 Structural Mechanics Version 4.2a 2 Replies

Chiwei Ong
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Hi, dear all,

After having lvar advice, i think i better learn structure mechanics and fluid flow from the basic so i can build a complete FSI model.

I would like to learn plot the Second Piola Kirchoff stress vs stretch ratio, as attachment, COMSOL offer me luxurious choice(my favourite software).

May i know what is the correct way to plot it out?

Stretch ratio :The stretch ratio or extension ratio is a measure of the extensional or normal strain of a differential line element, which can be defined at either the undeformed configuration or the deformed configuration. It is defined as the ratio between the final length ℓ and the initial length L of the material line.
en.wikipedia.org/wiki/Deformation_(mechanics)
2 Replies Last Post 2011年12月22日 GMT-5 21:39
Nagi Elabbasi Facebook Reality Labs
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Posted: 1 decade ago 2011年12月22日 GMT-5 11:57
The stretch ratio as you defined it is a scalar quantity. The closest available output from COMSOL is the YY component of the right stretch tensor (solid.UstchYY) or the first principal stretch.

Nagi Elabbasi
Veryst Engineering
The stretch ratio as you defined it is a scalar quantity. The closest available output from COMSOL is the YY component of the right stretch tensor (solid.UstchYY) or the first principal stretch. Nagi Elabbasi Veryst Engineering
Chiwei Ong
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Posted: 1 decade ago 2011年12月22日 GMT-5 21:39
Thank you Nagi.
Thank you Nagi.

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