This function retrieves the axial strain in an element at a particular time step.
GetAxialStrain (string DatabaseName, int TimeIndex, int ElementIndex, int LocalNodeNo)
DatabaseName (character string). The full path name to the relevant database.
TimeIndex (integer). The relevant time index.
ElementIndex (integer). The relevant element index.
LocalNodeNo (integer). The relevant local node number (1 to 3).
-9999998 (if the specified database is invalid)
-9999999 (if the requested value cannot be retrieved from the database)