Time-efficient geometrically non-linear finite element simulations of thin shell deployable structures
Abstract
Isogeometric analysis of thin shells can provide higher continuity and exact geometric description. It is shown in the existing literature that isogeometric analysis converges with fewer degrees of freedom than C⁰-continuous finite elements that use Langrange polynomial shape functions, but the speed of the solutions has not been previously assessed. In this research, the geometrically nonlinear bending of a thin shell deployable structure, a tape spring is studied, using both NURBS-based and C⁰-continuous finite elements. The complex deformation of a tape spring makes it a perfect case study to compare the computational efficiency of the mentioned techniques. The simulations are carried out in the commercial software ABAQUS and LS-DYNA, and it is found that isogeometric analysis is at least three times slower than the C⁰-continuous finite element methods.
Additional Information
© 2021 by Narravula Harshavardhan Reddy and Sergio Pellegrino. Published by the American Institute of Aeronautics and Astronautics, Inc., with permission. This research was funded by the Space Solar Power Project at Caltech.Attached Files
Accepted Version - Reddy-Pellegrino_final.pdf
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Additional details
- Eprint ID
- 107423
- Resolver ID
- CaltechAUTHORS:20210112-105611267
- Space Solar Power Project
- Created
-
2021-01-13Created from EPrint's datestamp field
- Updated
-
2021-11-16Created from EPrint's last_modified field
- Caltech groups
- GALCIT, Space Solar Power Project
- Other Numbering System Name
- AIAA Paper
- Other Numbering System Identifier
- 2021-1795