fix FEM prestretch

Author: bigfooted

Common/src/CConfig.cpp

@@ -2502,7 +2502,7 @@ void CConfig::SetConfig_Options() {
   *  Options: NO, YES \ingroup Config */
   addBoolOption("PRESTRETCH", Prestretch, false);
   /*!\brief PRESTRETCH_FILENAME \n DESCRIPTION: Filename to input for prestretching membranes \n Default: prestretch_file.dat \ingroup Config */
-  addStringOption("PRESTRETCH_FILENAME", Prestretch_FEMFileName, string("prestretch_file.dat"));
+  addStringOption("PRESTRETCH_FILENAME", Prestretch_FEMFileName, string("prestretch_file"));
 
   /* DESCRIPTION: Iterative method for non-linear structural analysis */
   addEnumOption("NONLINEAR_FEM_SOLUTION_METHOD", Kind_SpaceIteScheme_FEA, Space_Ite_Map_FEA, STRUCT_SPACE_ITE::NEWTON);

TestCases/disc_adj_fsi/configFEA.cfg

@@ -10,7 +10,7 @@
 SOLVER= ELASTICITY
 
 PRESTRETCH = YES
-PRESTRETCH_FILENAME = prestretch.dat
+PRESTRETCH_FILENAME = prestretch
 
 DE_EFFECTS = YES
 ELECTRIC_FIELD_CONST = 4.25E-11

config_template.cfg

@@ -1822,7 +1822,7 @@ ELECTRIC_FIELD_DIR= (0.0, 1.0)
 PRESTRETCH= NO
 %
 % Filename to input for prestretching membranes
-PRESTRETCH_FILENAME= prestretch_file.dat
+PRESTRETCH_FILENAME= prestretch_file
 %
 % ----------------------- Body Forces -----------------------%
 %