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von Mises or Equivalent stress for Beam Elements

Mon, 2014-11-17 17:55 - ALL
education
von mises
Beam Element

Are there analytical expressions for computing von Mises or equivalent stress at any point for Beam elements similar to the ones in continuum elements? I would like to design a structure with beam elements and ensure that the equivalent stress is within bounds (yield stress etc) for the structure to be safe.

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Soil Mechanics and Fossil Dinosaur Trackways

Thu, 2010-12-16 21:16 - Lee Margetts
research
penetration
Plasticity
soft substrates
soils
Pile & Foundation
von mises
Geotechnics
Geotechnical engineering
foot deformity
Track

My PhD student Peter Falkingham (who graduated 15 December 2010) has published some interesting papers on Dinosaur Trackways. These might be of interest to those teaching Soil Mechanics, to give some examples that might be more stimulating than foundation design or traditional geotechnical engineering.

References below:

Falkingham P.L., Bates K.T., Margetts L. and Manning P.L. (2011) "The 'Goldilocks' effect: Presevational bias in vertebrate track assemblages", Journal of the Royal Society Interface, accepted for publication. Impact factor 4.241.

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MSts's picture

Marc/Mentat: Von Mises Stress in cantilever beam

Tue, 2010-05-11 09:35 - MSts
von mises
moment
cantilever
rigid body
nodal tie

Hi,

I am performing a very simple cantilever analysis with 5 beam elements in Mentat. I get good results for deflection but Von Mises Stress is very small!! I was thinking that probably I need to connect the elements (rigid body?) or make nodal ties because the Moment Tensor is 0 in all 3 directions, but I don't know how to do it and I can't find an answer in the software documentation.

Can anybody help me?

Thanks

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Plasticity

Fri, 2007-11-30 19:35 - Ray_Lau
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Plasticity
von mises

Dear all,

Do you have any reference about the theory of plasticity? Especially about flow theory and von Mises yield criterion?

For example if I have an effective stress - plastic strain relationship, and I after yielding, I increase my strain again, how can I obtain the increment of the plastic strain and the stress deviator tensor?

Thanks a lot.

Best,

Ray

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