image thumbnail

FStr - Finite Strip Computer Application 1.3.0

version 1.3.1 (1.43 MB) by Joao De Lazzari
Finite Strip Method Computer Application Program: Elastic Buckling Analysis and mode viewer of thin-walled structures.


Updated 12 Sep 2021

From GitHub

View license on GitHub

View FStr - Finite Strip Computer Application on File Exchange


Elastic Buckling Analysis of Thin-Walled Structures.

Web Site 1:

Web Site 2:

The FStr computer application program gives to the user an easy and an intuitive elastic buckling analysis, through a Finite Strip Method, and its modal preview of a thin-walled structural element. Besides the modes, the user can determinate the critical buckling load in each critical length.

What is FStr?

  • FStr Computer Application is a software developed on the basis of the Finite Strip Method formulation;

  • The formulation uses trigonometric functions in longitudinal direction in series, with the purpose of interpolate the solution inside the strip, and form a shape suitable to any type of end boundary condition;

  • Signature curves are one type of analyze the results, through a set of longitudinal lengths. Then, the user can analyze the critical modes in any critical length;

  • 3D buckling modes, with colorful plots, helps the user to identify the critical buckling mode easily.

Easy and intuitive interface

  • The Graphical User Interface (GUI) is implemented in the MATLAB App Designer (MATHWORKS, 2000). The purpose of the GUI is to make it easier to the user to set up the data input and to analyze the data output.

  • The FStr has an accessible and easy graphical user interface, and is conceived to attend research activities as well as engineering design of thin-walled structures with arbitrary cross-sections.


To install the FStr application in Windows, proceed according to the following steps:

1 - Download the newest .EXE file in the releases (;

2 - Execute the downloaded file;

3 - Follow the steps and wait for installing the MATLAB Runtime;

4 – A shortcut will be placed in desktop;

5 - Once installed, you may run the FStr program and enjoy elastic buckling analysis.

Observation 1: In case of uninstalling, go to “Add or Remove Programs” or “Programs and Features” or “Apps & Features”, and search for “FStr” and “MATLAB Runtime”. You must uninstall both applications for completely remove the FStr;

Observation 2: In case the program is not running properly, try to uninstall the MATLAB Runtime and install again;

Observation 3: In case the program reports some unusual bugs, please contact Joao Alfredo de Lazzari (;

Observation 4: Using another type of software that requires a MATLAB Runtime, may be compromising the usage of the FStr Computer Application.

Developed by:

Joao Alfredo De Lazzari

follow on Linkendin

Eduardo de Miranda Batista

  • Links:

LabEST - Laboratory of Structures and Materials Professor Lobo Carneiro

COPPE - Alberto Luiz Coimbra Institute for Graduate Studies and Research in Engineering

PEC - Civil Engineering Program

For contact, please email Joao Alfredo De Lazzari Author's email:

View FStr - Finite Strip Computer Application on File Exchange

Cite As

Joao De Lazzari (2021). FStr - Finite Strip Computer Application 1.3.0 (, GitHub. Retrieved .

MATLAB Release Compatibility
Created with R2019a
Compatible with any release
Platform Compatibility
Windows macOS Linux

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
To view or report issues in this GitHub add-on, visit the GitHub Repository.
To view or report issues in this GitHub add-on, visit the GitHub Repository.