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Semi-analytical methods for plates, shells and stiffened panels
- Linear static analyses, with field outputs of displacements, strains and stresses
- Linear buckling
- Vibration, with or without pre-stress
- Panel flutter using the piston theory
- Geometrically non-linear static analyses (postbuckling) using the Newton-Raphson method or the arc-length methods of Riks and Crisfield
- Multi-domain assemblies of cylinders, stiffened panels and panels with debonding defects
The structural matrices are solved with structsolve.
Citing this library
Saullo G. P. Castro, Nathan D'Souza. (2026). Semi-analytical methods for plates, shells and stiffened panels (Version 0.6.21). Zenodo. DOI: https://doi.org/10.5281/zenodo.2541522.
Documentation
The documentation is available on: https://saullocastro.github.io/panels.
Installation
To get the latest version:
python -m pip install panels
History
See CHANGELOG.md for the details of each version.
- version 0.6.21 (2026-09-18), including the changes first released in 0.6.13
- Fixed the mass of the base of
BladeStiff2D, which was missing, and the section forces ofMultiDomain.force(), which lacked the Jacobian StiffPanelBay.calc_kA()sums the contribution of every panel, andcalc_kA,calc_cA,calc_fext,save,get_sizeanduvw_stiffenerofStiffPanelBayandShell.calc_cAno longer raiseShell.strain()andShell.stress()work for a plate withr=None- Line coverage of the tests raised from 67 % to 92 %
- Fixed
StiffPanelBay.add_paneland the partial-domain integration ofShell.calc_kC,calc_kGandcalc_kM - The limits
Shell.x1, x2, y1, y2of the integration domain default toNoneinstead of the sentinels-1and+1, which silently integrated the full domain for a limit at1.0and ignored a limit given on one side only; the old-1now raises - Fixed the
MultiDomainskin-base connections: the'SB'penalty was a hard-coded mm-unit value, the top and bottom panels depended on their order in the assembly, and the connection dictionaries were modified - Penalty constants of each
MultiDomainconnection can be given with'kt'and'kr' - Reproduction of Stamatelos and Labeas with plate domains only in
tests/multidomain/test_stamatelos_labeas_2023_multidomain.py, using everyMultiDomainconnection - Fixed the argument handling of the stiffness API: an invalid
corc_cteno longer reaches the nogil kernels, and a model that needs a radius raises instead of computing withr = 0 - Reproduction of Stamatelos and Labeas (Computation 2023, 11, 110) in
notebooks/stamatelos_labeas_2023.ipynb - Tangent stiffness matrix that is the exact derivative of the internal force vector, giving quadratic convergence to the Newton-Raphson method
ShellandMultiDomaincan be passed directly tostructsolve.Analysis, including the arc-length methods- Gauss-Legendre points and weights from
scipy.special.roots_legendre - Modules of the models renamed without the
_bardellsuffix, and the legacy_bardellmodel names removed frompanels.modelDB.db - Sphinx documentation with usage examples
- Fixed the mass of the base of
- versions 0.5.x
- Damaged multidomain connections
- up to version 0.3.x
- Multidomain methods for pristine structures
License
Distributed under the 3-Clause BSD license (https://raw.github.com/saullocastro/panels/main/LICENSE).
Contact: S.G.P.Castro@tudelft.nl
1 maintainer
Metadata
1 maintainer
Release files for panels 0.6.21
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| panels-0.6.21.tar.gz | 3.0 MB | Details |
Built distributions (wheels)
Total release size: 129.7 MB
Release files / panels-0.6.21.tar.gz
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