professor ben schafer's thin-walled structures research group - johns hopkins university

Download archive for CUFSM

Current version is CUFSM 4.04, download here.

 

CUFSM is open source, Academic Free License v 1.2. Please provide a reference to the author (Ben Schafer) and note the version you are using. Archive of older CUFSM versions are also available for download. Contact schafer@jhu.edu with problems.

 

Full page archives of older versions with tutorials and links 

cufsm v3.12 January 2007 - October 2011

Download archived versions of the CUFSM code 

standalone PC codes

cufsm v4.03 (mcrinstaller) original release October 2011

cufsm v3.12 original release January 2007

cufsm v3.11 original release October 2006

cufsm v2.6 original release September 2003

cufsm v2.5 original release December 2001

cufsm v2e ported from Matlab using Matlab compiler version 2, Matlab V6, R12 - October 2001

cufsm v2d ported from Matlab using Matlab compiler version 1, Matlab V5.3, R11.1 - August 2001

cufsm v2c ported from Matlab - original release August 2000

execufsm v1d - DOS based text in / text out code - original release 1997

matlab open source codes

cufsm v4.03 original release October 2011

cufsm v3.12 original release January 2007

cufsm v3.11 original release October 2006

cufsm v2.6 original release September 2003

cufsm v2.5 original release December 2001

cufsm v2e (coded on Matlab v6.0 R12) - original release October 2001

cufsm v2d (coded on Matlab v5.3 R11.1) - original release August 2001

cufsm v2c (coded on Matlab v5.3 R11.1) - original release August 2000

cufsm v1d (coded on Matlab v4.2) - original release 1997

supplemental materials

cufsm v2.5 installation, manuals and tutorials, example files

 

Notes v3.12:

Stable release of CUFSM with the constrained Finite Strip Method. Ran on PCs from Windows NT --> Windows 7. (In Win 7 must run in compatability mode)

Notes v3.11:

Major release with the constrained Finite Strip Method added.

Notes v2.0d:

(1) Springs and constraints are now  working in the standalone graphical code version. (they did not work in CUFSM v2.0c) 

Notes v2.0e:

version 2.0d has a bug when the C and Z template is used in units of Newtons and millimeters - the program only passes back one Poisson's ratio in the properties input, where two are needed. This has been fixed in version 2.0e. The graphics in the post-processing have been changed to indicate at what point you are currently plotting the mode shape. The program has been re-compiled on Matlab version 6, and appears to be working fine.  

TO INSTALL standalone code: Unzip the files into the directory of your choice. Then double-click or run "mglinstaller.exe", follow the on-screen instructions. You will have to add a statement to your PATH system variable, email schafer@jhu.edu with any problems that you have.

Notes - CUFSM 2.6 New Features

Improvements to the pre-processor include

 - divide an element into multiple elements automatically

 - delete any interior node automatically

 - generate master-slave constraints automatically

Improvements to the properties module include

 - warping and shear center properties for open sections added

 - stress generation from bimoments (warping torsion) added

Errors have been identified in the Cw calculation a new version will be released soon. This DOES NOT influence the finite strip calculation which does not need section properties to evaluate the member. (You may want to use Andrew Sarawit's CU-TWP in the meanwhile for your Cw calculation.)

Improvements to the post-processor include

 - post and compare combined for easier comparison of multiple runs

 - load up any old runs to compare against current run on the fly

 - generate buckled shapes in a separate plot window for use in reports

CUFSM 2.5 New Features

What is the critical elastic buckling stress of a thin-walled beam or column? Find out by using our free finite strip software for the elastic buckling calculation of thin-walled structures. Recently updated, CUFSM v2.5 is now available for download (12.07.2001). The latest version includes: streamlined user interface, templates for the input of common shapes (C's and Z's), simplified interface for applying loads, external springs and constraint equations, compare results of multiple (up to 9) runs, run all the graphics without Matlab in a standalone version. Extensive tutorials and instructions are available below. The finite strip method implemented in CUFSM is at the core of improving and modernizing the design of thin-walled structures. Understanding the uses of CUFSM and calculating buckling loads and moments for arbitrary thin-walled members is the first step towards numerical design of thin-walled members. For more on this see the the beginnings of the Direct Strength Method.

Version 2.5 Installation Notes

Powerpoint

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CUFSM2.5

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Installation Notes for both versions

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Version 2.5 Users Manual and Tutorials

Powerpoint

PDF*

CUFSM2.5

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zip

Download all Users Manual and Tutorial Files

 

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Table of Contents

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Frequently Asked Questions - What is CUFSM? Why use it? 

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Overview

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Installation Notes

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Tutorial 1 - Learn the basics and interpret results

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Tutorial 2 - Build a model from scratch and find Pcr

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Tutorial 3 - Build a model using the template and find Mcr 

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Advanced Functions - Boundary conditions, springs, constraints..

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Advanced Ideas - Defining buckling modes, higher modes... 

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Advanced Matlab - Parameter studies

 

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Theory - Background and stiffness matrices

* hyperlinks are not enabled in PDF version

Version 2.5 Example Files

used in...

All example files

all

zip examples.zip

 

Parameter Study

adv matlab

matlab binary file example_parameter_study.m

10/17/06 - schafer@jhu.edu : Note, the materials developed to support CUFSM and the program CUFSM were both developed, in part, through the sponsorship of research projects with the American Iron and Steel Institute ( www.steel.org ) and the National Science Foundation ( www.nsf.gov ). Any opinions, findings, and conclusions or recommendations expressed in this material (or through this software) are those of the author and do not necessarily reflect the views of the National Science Foundation.

 

 

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