# [cig-commits] r20806 - short/3D/PyLith/branches/v1.7-trunk/doc/userguide/materials

Fri Oct 5 12:10:01 PDT 2012

Author: brad
Date: 2012-10-05 12:10:00 -0700 (Fri, 05 Oct 2012)
New Revision: 20806

Modified:
short/3D/PyLith/branches/v1.7-trunk/doc/userguide/materials/materials.lyx
Log:
Small edit.

Modified: short/3D/PyLith/branches/v1.7-trunk/doc/userguide/materials/materials.lyx
===================================================================
--- short/3D/PyLith/branches/v1.7-trunk/doc/userguide/materials/materials.lyx	2012-10-05 17:40:39 UTC (rev 20805)
+++ short/3D/PyLith/branches/v1.7-trunk/doc/userguide/materials/materials.lyx	2012-10-05 19:10:00 UTC (rev 20806)
@@ -1222,8 +1222,10 @@
is associated with the accuracy of the solution.
In purely elastic materials, the accuracy is independent of the time step,
so the stable time step is infinite.
- For viscoelastic materials we ser the stable time step to be 1/5 of the
+ For viscoelastic materials we set the stable time step to be 1/5 of the
relaxation time.
+ In quasi-static simulations we check the stable time step at every time
+ step.
\end_layout

\begin_layout Standard
@@ -1287,6 +1289,10 @@

is the volume of the cell.
We determined the scaling factoring empirically using several benchmarks.
+ In dynamic simulations we check the stable time step only at the beginning
+ of the simulation.
+ That is, we assume the elastic properties and mesh do not change, so that
+ the stable time step is constant throughout the simulation.
\end_layout

\begin_layout Standard