[cig-commits] [commit] willic3/fix-plasticity: Updated userguide to describe feasible stress state. (054f1db)

[cig_noreply at geodynamics.org]

Repository : https://github.com/geodynamics/pylith

On branch  : willic3/fix-plasticity
Link       : https://github.com/geodynamics/pylith/compare/277fe483ec698db53f09cac0833b3ef621c4eb7f...054f1dba5f17378697de98f6a7cf60a68f9028a6

>---------------------------------------------------------------

commit 054f1dba5f17378697de98f6a7cf60a68f9028a6
Author: Charles Williams <C.Williams at gns.cri.nz>
Date:   Tue Nov 18 14:25:55 2014 +1300

    Updated userguide to describe feasible stress state.


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054f1dba5f17378697de98f6a7cf60a68f9028a6
 doc/userguide/materials/materials.lyx | 36 +++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/doc/userguide/materials/materials.lyx b/doc/userguide/materials/materials.lyx
index 948826b..e145d2e 100644
--- a/doc/userguide/materials/materials.lyx
+++ b/doc/userguide/materials/materials.lyx
@@ -5525,6 +5525,42 @@ allow_tensile_yield
 True
 \family default
 .
+ This same criterion is used to determine whether a feasible stress state
+ is attainable in cases where 
+\family typewriter
+allow_tensile_yield
+\family default
+ is 
+\family typewriter
+False
+\family default
+.
+ If Equation 
+\begin_inset CommandInset ref
+LatexCommand ref
+reference "eq:114"
+
+\end_inset
+
+ yields a smaller value than Equation 
+\begin_inset CommandInset ref
+LatexCommand ref
+reference "eq:127"
+
+\end_inset
+
+, this implies 
+\begin_inset Formula $\sqrt{^{t+\Delta t}J_{2}^{\prime}}<0$
+\end_inset
+
+, which is not a feasible stress state (see Equation 
+\begin_inset CommandInset ref
+LatexCommand ref
+reference "eq:110"
+
+\end_inset
+
+).
 \end_layout
 
 \begin_layout Standard