A collection of Python modules for developing Shell Nonlinear Analysis Programs (pronounced "shnapper", similar to "snapper", a colloquial term for snapping turtles, which belong to a biological order best known for having shells.) This library discretizes shell structures isogeometrically, and relies on tIGAr and its associated dependencies, chiefly FEniCS. It is also recommended to use this library in conjunction with the advanced form compiler TSFC, which may be installed for FEniCS by following the Singularity recipe provided in the tIGAr repository.

This module was originally written to support the following paper, submitted to a special issue on open-source software for partial differential equations:

@article{Kamensky2021,
title = "Open-source immersogeometric analysis of fluid--structure interaction using {FEniCS} and {tIGAr}",
journal = "Computers \& Mathematics with Applications",
volume = "81",
pages = "634--648",
year = "2021",
note = "Development and Application of Open-source Software for Problems with Numerical PDEs",
issn = "0898-1221",
author = "D. Kamensky"
}