Program SPORTHO
Solutions
for specially-orthotropic laminates subjected to various types of
simply-supported boundary conditions are implemented in this program. These solutions are discussed in Chapter 11. Note that the program does not confirm that
the stacking sequence defined by the user does, in fact, correspond to a
specially-orthotropic laminate. A
warning is printed if a ply fiber angle other than 0° or 90° is defined, since
this likely means that the laminate is not specially-orthotropic.
The
program should be downloaded and saved to a convenient folder location on your
computer. Once the program is initiated
it will ask whether you wish to read several input values “FROM A FILE? (Y/N)” If you enter a “Y” (or “y”, meaning “yes”)
the program will search for a file containing the needed information. If the file is not found you will be directed
to enter the values from the keyboard.
The
results of the analysis are both printed on the screen and stored in a file
named “Answer.txt”. All files created
during execution of the program are stored in the folder that contains program
SPORTHO.
Warning: The user must input all values using a
consistent system of units. For example,
using the SI system of units a typical value of Young’s modulus might be 200
GPa = 200 x 109 N/m2, a typical ply thickness might be
0.125 mm, and a thermal expansion coefficient might be -1.0 x 10-6
m/m-°C. These values should be input as
200.0E9, 0.000125, and -1.0E-6, respectively.