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Finite Strip Computer Application
FStr is a computational tool based on the Finite Strip Method, designed for the elastic buckling analysis of thin-walled structures. With an intuitive interface, it enables users to visualize buckling mode shapes in both 2D and 3D formats and to compute critical buckling loads/stresses for various member lengths.
What is FStr?
A software developed using the Finite Strip Method (FSM), applying trigonometric series in the longitudinal direction to satisfy diverse boundary conditions;
Allows analysis across a range of lengths through signature curves, helping users identify critical buckling modes for each case;
Offers 3D visualizations with detailed color plots, enhancing the interpretation of structural behavior.
Easy-to-Use Interface
The Graphical User Interface (GUI) is developed in MATLAB App Designer;
Designed for clarity and accessibility, enabling seamless data input and results interpretation;
Suitable for both academic research and engineering applications involving thin-walled profiles of arbitrary cross-sections.
Graphical User Interface Description
- Coordinates Panel:
- Elements Panel:
- Orthotropic Material Panel:
- Loading:
- Automatic Cross-section generation:
- End Boundary Condition:
- C-C: Clamped-Clamped (Fixed-Fixed);
- S-S: Simply-Simply (Pinned-Pinned);
- C-S: Clamped-Simply (Fixed-Pinned);
- C-G: Clamped-Guided (Fixed-Guided);
- C-F: Clamped-Free (Fixed-Free).
- Half-wave terms for trigonometric series:
- Longitudinal set of Lengths:
- " logspace(1,4,200) " : Log spaced vector from 10^1 to 10^4, with 200 lengths;
- " 10:100:10000 " : Linear spaced vector from 10 to 10000, with increment of 100;
- " linspace(10,10000,200) " : Linear spaced vector from 10 to 10000, with 200 lengths;
- Dynamic 2D cross-section geometry
- About the FStr Computer Application
- Elastic Buckling Analysis Button
- Number of superior modes displayed:
- Load Factor:
- Selection of Superior Modes
- Signature Curve and Superior Modes:
- Dynamic 2D Modal Shape:
- Save:
- Selection of Longitudinal Length
- Mode Scale and Interpolation points changer
- 3D Modal Shape for the selected Length
Software Registration
FStr is officially registered with the Brazilian National Institute of Industrial Property (INPI) under the registration number BR512024003915-5. The software is free for public use, though its internal routines remain proprietary and protected.
More details available in Software Registration.
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