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SECPRO.DOC
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1991-02-06
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SECPRO - Section Properties of Composite Plates
SECPRO is used to analyzed a single .PRP file for sectional
properties. It can be called via ACCESS or loaded directly from
the DOS prompt.
Before running SecPro, it is necessary to create at least one
.PRP file using LAMCON. Assuming you have done this, we can get
started.
Booting SecPro
From the ACCESS menu, move the pointer to ScPro or enter SECPRO
at the DOS prompt.
If the ACCESS version does not cause SecPro to load, see the
section on TroubleShooting.
Operational Details
SecPro is very easy to operate. You should be able to generate
output without having to reference this manual. However, just in
case you do have problems, a sample problem is presented.
Default Section Width
When SecPro loads, the opening screen displays the title and
copyright notice. Just below this, the section width option is
shown.
SecPro * Version F22 (c) 1987, Parados Technical Services
Default section width is 1.0
Change this? (Y/N): N
If you wish to keep the default setting of 1.0, then press the
<CR>. Otherwise, the [Y] key should be used. This will allow
you to enter a new section width.
Base Theory
When computing sectional properties of composites, it is common
to use a transformational theory to adjust for the varying levels
of stiffness within the ply groups. Because more than one
theory can be found in use in industry, SecPro gives you the
choice.
Currently: Max Thickness
1 = Low Stiffness
2 = Max Thickness
3 = High Stiffness
4 = User defined base
? = Explanations
X = Continue (Produces INPUT prompt)
[ ]
This menu appears the first time that SecPro is booted. This is
kind of a reminder that you should set the base initially as the
default setting may not be appropriate for your use.
The default setting is Maximum Thickness which means that the
base stiffness is determined based on the thickest ply. This is
the method that is used in the Gibbs and Cox design manual.
The other settings can be selected by pressing the appropriate
number key (1-4). The user defined base is commonly used as this
permits direct comparison between dissimilar lamintes. Usually,
a user defined base is set at about 1.0E6.
Some explanations are available if you need some additional help.
When the selection has been made, press the [X] key and the input
prompt will be displayed.
The Input Prompt
SecPro is a typical loop type of program. You remember those
don't you? The program runs from top to bottom and then starts
over again. The good thing about this type of design is that it
is very easy to learn. The bad news is that it is somewhat
resrictive and boring to watch. Oh well.
Input Prompt --> Read.PRP File
Assign Output Name
Calculate Results ----> Write Disk Report
The SecPro Design Loop
The following is what you will see the first time that the Input
Prompt is displayed. Of course the directory of .PRP files will
not be the same.
* INPUT *
Enter filename (Do not include .PRP extension)
[?] for some assistance
BENCH.PRP BTI.PRP BTI001.PRP BTI002.PRP CDB200.PRP
FARR1.PRP FARR2.PRP GIBBS.PRP KOV001.PRP KOV002.PRP
UNI.PRP UNI2.PRP UNI3.PRP
>
The input prompt can be easily recognized by the shape of the
cursor bracket. The cursor bracket is always the bright white >
symbol that rests just to the left of the cursor.
Commands and FileNames
While at the input prompt, both commands and filenames can be
entered. A listing of the available commands can be displayed
by entering a [?] at the input prompt. The following screen will
appear.
While at the Input prompt, the following options are available:
* Enter a valid .PRP filename to obtain section property report
* Press the [RETURN] key with nothing entered to exit SecPro
* DIR will produce a directory listing of all .PRP files on disk
* HELP shows a bunch of text that explains SecPro
* CLS is used to removed any screen clutter - Try it and see.
* NEWB can be entered if the section width is not equal to 1
* UPDATE reads a text file called UPDATE. Last minute stuff.
* REVIEW displays a .SEC output file on the screen.
* NEWBASE controls what theory is being used to transform plies.
* PLY STIFFNESS allows you to select which ply stiffness is used.
* STATUS? tells you what the current defaults settings are.
* STRENGTH produces the .STN report giving ultimate moments &loads.
* SHOW DETAIL writes the .DTL file which is an expanded .SEC
Obviously, if SecPro accepts these commands, you are not allowed to
use these as laminate file names. If you have, you must return to
DOS and REName it.
.PRP FileNames
Most of the time, the input prompt is used to enter .PRP names.
When doing this, do not include the .PRP as it is assumed by
SecPro.
Just below the Input Prompt, the directory on the default drive
has been displayed showing all .PRP files. If no files appear
when the Input Prompt is displayed the first time, this will
indicate that you must precede the filename with a drive
designation. ie. A:filename or B:filename
The second time that the Input Prompt is shown, the directory
will not automatically be visible. To produce it, you must enter
DIR. Other DIR commands consist of DIR *.* and DIR *.SEC
If a valid .PRP filename is entered, SecPro will attempt to read
it. The following file summary should appear:
Attemping to open file: BTI.PRP in C:\COPAN
< File Summary >
05-19-1987 / S glass-Kevlar epoxy laminate
Groups= 8
Plies= 8
Tot.t= .4285
Prop= PSI
Dist= IN
Dens= LBFT3
Total ply groups in laminate: 8
No core plies found
Is this the correct file? (Y/N):
SecPro will report what was in the file and will then wait for
you to confirm that this was the correct laminate. [Y] or [N]
must be pressed in order to continue. If [N] then the Input
Prompt will return allowing you to enter another file. The [Y]
of course will continue the process which produces the next
prompt...
The OutPut Prompt
Before the calculations begin, an output name must be assigned.
The reason for this is because all reports are written directly
to the disk. All names must be given without an extension as
SecPro will add the .SEC extension to all output reports.
* OUTPUT *
? for an explanation
>
Creating and Appending
If the name that you give is not already in use, then it will be
created. A message will indicate such. However, in the event
that the filename already exists, SecPro will not automatically
overwrite it. Another message/prompt will appear informing you
that the file was found. You then have the option of OV e R writing
or ADD ing to it.
To do one or the other, press the appropriate keys. (OVR or ADD)
For example, you could collect the results into a single file for
all runs pertaining to a single project. Then, when reviewing,
you would not have to edit/print multiple separate reports.
If you wish to use the same name as used at the Input Prompt, all
you have to do is press the <CR> with nothing entered. SecPro
will confirm the name before continuing.
Calculation Results
When the calculations are complete, a brief screen listing will
be shown so that you have an idea of the sectional properties.
The file will automatically be written to the default drive
unless you specified a drive designator in the output name.
Immediately following the calculations, this type of screen will
be visible.
SecPro Version F22 (c) 1987, Parados Technical Services
-------------------------
Summary of Analysis
-------------------------
Using Max thickness theory Base stiffness=1.2E+06
Neutral Axis located 0.223 above bottom of ply 8
Laminate Inertia=0.007392 Z=0.0332
G/C Total EI=1.02E+04
Mixtures E =1.33E+06
<< Output document has been successfully written to disk >>
REVIEW can be used to screen list BTI.SEC
* INPUT *
Enter filename (Do not include .PRP extension)
[?] for some assistance
>
Again the Input Prompt is produced which means that you have
completed a program loop. You are now back at the entry and exit
point. To run another .PRP file, enter it and the entire
process begins once again. To exit, press <CR> with nothing
entered.
Reviewing the Output Reports
As you may have noticed in the previous screen a line of
information indicated that to screen list a .SEC file, the
command REVIEW must be used. To use REVIEW, enter it from the
Input Prompt.
* INPUT *
Enter filename (Do not include .PRP extension)
[?] for some assistance
>REVIEW
A small review prompt will appear reminding you not to include
the .SEC:
Do not include the .SEC
File to review:
To look at the file that you have just run, enter the output name
that you assigned.
If the file is found, a speed menu will appear that will
determine how quickly the information should be scrolled on the
screen. Medium is a good scanning speed.
--------
Fast
Medium
Slow
--------
After you have decided on the speed, any key should begin the
output. The output can not be paused during the scroll however
it can be stopped using the [Esc] key.
When the file has finished scrolling, the review prompt will
return. SecPro assumes that you wish to see another file. To
cancel the review, press <CR> with nothing entered. SecPro will
then return to the Input Prompt.
Exiting SecPro
Press <CR> at the Input Prompt with nothing entered.