Yielding of polycrystals in multi-axial stress states

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Discussion Overview

The discussion revolves around the yielding of polycrystals under multi-axial stress states, exploring both models for yielding and mechanistic explanations. Participants seek resources and explanations to better understand the topic, which includes theoretical and applied aspects of material science.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification

Main Points Raised

  • Some participants inquire about the type and degree of polycrystalline models for yielding, as well as the overall approaches available.
  • One participant expresses a preference for mechanistic explanations over models.
  • Several participants provide links to external resources and lecture series that may help clarify the topic of polycrystalline slip and related concepts.

Areas of Agreement / Disagreement

Participants have not reached a consensus on the specific aspects of polycrystalline yielding they are interested in, with some focusing on models and others on mechanistic explanations.

Contextual Notes

The discussion lacks clarity on the specific definitions and assumptions regarding polycrystalline yielding, which may affect the understanding of the provided resources.

bill nye scienceguy!
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Can someone either give me a good explanation of this or link me to a site that can? Thanks.
 
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bill nye scienceguy! said:
Can someone either give me a good explanation of this or link me to a site that can? Thanks.

This may help.

http://www.mech.northwestern.edu/fac/brinson/download/LCB_Gao_IJPpoly.pdf
 
I'm left wondering whether you're after polycrystalline models for yielding (and if so, of what "type and degree" or an overall view of the different approaches available) or mechanistic explanations?
 
the latter, please.
 
Let's see if these are a step in the right direction.

The polycrystalline part of this lecture series:
http://www.poco.phy.cam.ac.uk/teaching/A_Donald/

This has a short intro about polycrystalline slip:
http://www.doitpoms.ac.uk/tlplib/slip/slip_in_poly.php

A pretty interesting one although focuses primarily on twinning:
http://www.mat.ensmp.fr/Personnel/Forest/publi/torino2000.pdf

General topic related stuff:
http://physics.guide.ac/276-Crystalline+Solids.html
http://people.clarkson.edu/~isuni/Chap-8.htm
http://en.wikipedia.org/wiki/Dislocation#Dislocations.2C_slip_and_plasticity
http://www.virginia.edu/bohr/mse209/chapter7.htm
http://web.Earth'sci.unimelb.edu.au/wilson/ice1/dislocation.html
 
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