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· For a "space" with
the principal stress values defining the axes, the yield surface will form
a prism about the hydrostatic
line for which line: σ1 = σ2
= σ3 .
· All stress states inside the prism are unable
to cause yield.
· All stress
states on the prism surface have: τres
= τcr, and
are at the yield
condition.
· Outside
the prism, τres >
τcr , and all stress states
can cause plastic deformation.
· How
is a value for τcr
to be estimated?
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From:
Wyatt and Dew-Hughes,
"Metals, Ceramics, and Polymers,"
Cambridge
(1974) |
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