/Elastic.java/1.3/Tue Jul  4 11:45:18 2006//
/Elastoplastic.java/1.7/Sat Dec 12 20:13:47 2009//
/SpringMaterial.java/1.2/Tue Jul  4 11:45:18 2006//
/ThermoElastoplastic.java/1.6/Sat Dec 12 20:17:52 2009//
