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I was wondering what is origin of weak form in continuum mechanics.

Submitted by roger84 on
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 Last day, I took my class of Nonlinear Analysis of solids and structures.

 And I learned about the strong form & weak form in the prilciple of Virtual work.

 I can find the origin of those two form that is from Piola-Kirchhoff stress tensor.

 but why Integral form is called "weak form"? why Differential form is called "strong form"? why?

 I was just wondering.

 

PhD in Europe, USA- differences?

Submitted by Atul Jain on
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PhD culture
pedagogy

Dear All,

          What do you think is the difference in PhD in Europe, USA? My thesis supervisor used to say "In US it is a deep inspection of a subject, while European PhD is a grand problem solving" What is your opinion on this matter? Is there some basic difference between how a PhD is approached by students and supervisor in both these places? if indeed there is a difference, in your opinion which approach is preferable??

 

Atul Jain

 

Localization of Inelastic Deformation 2011

Submitted by jenda_z on
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course
inelasticity
localization

Dear colleagues,

I would like to bring to your attention the advanced course on Modeling of localized inelastic deformation that will be taught by Milan Jirasek in Prague, Czech Republic on 12-16 September 2011. More detailed information on the course is posted at http://mech.fsv.cvut.cz/~milan/course2011.html. We are looking forward to seeing you in Prague!

Plotting stress-strain graph from simulation

Submitted by gnoij on
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Abaqus output
Stress-strain graph

Hi everyone, I am studying an example in Abaqus example problems manual (version 6.10) called "uniaxial rachetting under tension and compression". In the example there is a graph plotting axial stress-strain relationship for experiment data and simulation data. By studying the inp file I knows that the writer has ask for some outputs like RF1, RF2, RF3, S, ALPHA, ALPHAN, LE and so on in certain node and element set. However, I still can't figure out how writer use the output data from simulation to plot the axial stress-strain graph.

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