  Developing engineering systems that rely on flow-induced reconfiguration, the
phenomenon where a structure deforms under flow to reduce its drag, requires
design tools that can predict the behavior of these flexible structures.
Current methods include using fully coupled computational fluid dynamics and
finite element analysis solvers or highly specialized theories for specific
geometries. Coupled numerical methods are computationally expensive to use and
non-trivial to setup, while specialized theories are difficult to generalize
and take a long time to develop. A compromise between speed, accuracy, and
versatility is required to be implemented into the design cycle of flexible
structures under flow. This paper offers a new numerical implementation of the
pressure drag in the context of a corotational finite element formulation on
MATLAB. The presented software is verified against different semi-analytical
theories applied to slender plates and disks cut along their radii as well as
validated against experiments on kirigami sheets and draping disks.
