tadd example values for Young's modulus - sphere - GPU-based 3D discrete element method algorithm with optional fluid coupling
 (HTM) git clone git://src.adamsgaard.dk/sphere
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 (DIR) commit 8d7b057dbf133673cc13681c0490b548c20ec602
 (DIR) parent 4991fee6551790c302a74f6973c4e48e2c74070a
 (HTM) Author: Anders Damsgaard Christensen <adc@geo.au.dk>
       Date:   Fri,  9 Sep 2016 12:53:49 -0700
       
       add example values for Young's modulus
       
       Diffstat:
         M python/sphere.py                    |       3 +++
       
       1 file changed, 3 insertions(+), 0 deletions(-)
       ---
 (DIR) diff --git a/python/sphere.py b/python/sphere.py
       t@@ -3822,6 +3822,9 @@ class sim:
                stiffness (`k_t`) when its value is greater than zero. Using this
                parameter produces size-invariant behavior.
        
       +        Example values are ~70e9 Pa for quartz,
       +        http://www.engineeringtoolbox.com/young-modulus-d_417.html
       +
                :param E: The elastic modulus [Pa]
                :type E: float
                '''