iMechanica - shear strain
https://imechanica.org/taxonomy/term/9743
enEquivalent strain in large torsional deformation
https://imechanica.org/node/16520
<div class="field field-name-body field-type-text-with-summary field-label-hidden"><div class="field-items"><div class="field-item even"><p>
Dear All
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Looking for a methodology to convert shear stress-shear strain data from a torsion test in large deformations into true strain-true stress curve, I found two schools of thought:
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<img src="http://physweb.bgu.ac.il/cgi-bin/mimetex.cgi?\epsilon=\frac\gamma{sqrt3}" border="0" alt="" align="middle" />
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and
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<img src="http://physweb.bgu.ac.il/cgi-bin/mimetex.cgi?\epsilon=\frac2sqrt3ln(\frac\gamma2+\frac12sqrt{4+\gamma^2})" border="0" alt="" align="middle" />
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I found also in recent papers a strong debate on which should be the correct method. For example:
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<a href="https://www.google.it/url?sa=t&rct=j&q=&esrc=s&source=web&cd=4&cad=rja&uact=8&ved=0CE8QFjAD&url=http%3A%2F%2Fwww.researchgate.net%2Fpublication%2F235185779_Comment_on_A_comparison_of_the_von_Mises_and_Hencky_equivalent_strains_for_use_in_simple_shear_experiments''%2Ffile%2F3deec5282f8db40d31.pdf&ei=XcpgU8-rOqTd7Qbpu4HwCQ&usg=AFQjCNETZvVErhOSH5WlbHrYmrNMEasebQ&sig2=OkNCJ1P0H90rFsClBB_Tew&bvm=bv.65636070,d.ZGU" target="_blank">Comment_on_A_comparison_of_the_von_Mises_and_Hencky_equivalent_strains_for_use_in_simple_shear_experiments</a>
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Looking at references in the paper and simply searching with google about this topic, it is easy to find many papers where both schools of thought defend their positions. In your opinion, on the basis of current knowledge of continuum mechanics of finite deformation, which is the correct method?
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Thank you in advance
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</div></div></div><div class="field field-name-taxonomy-forums field-type-taxonomy-term-reference field-label-above"><div class="field-label">Forums: </div><div class="field-items"><div class="field-item even"><a href="/forum/109">Ask iMechanica</a></div></div></div><div class="field field-name-taxonomy-vocabulary-6 field-type-taxonomy-term-reference field-label-hidden"><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/76">research</a></div></div></div><div class="field field-name-taxonomy-vocabulary-8 field-type-taxonomy-term-reference field-label-above"><div class="field-label">Free Tags: </div><div class="field-items"><div class="field-item even"><a href="/taxonomy/term/469">torsion</a></div><div class="field-item odd"><a href="/taxonomy/term/4207">finite deformations</a></div><div class="field-item even"><a href="/taxonomy/term/9742">equivalent strain</a></div><div class="field-item odd"><a href="/taxonomy/term/9743">shear strain</a></div></div></div>Thu, 01 May 2014 07:45:14 +0000AAGP16520 at https://imechanica.orghttps://imechanica.org/node/16520#commentshttps://imechanica.org/crss/node/16520Error | iMechanica