Accession Number:

AD1155527

Title:

On-demand Stiffness Selectivity for Morphing Systems

Descriptive Note:

[Technical Report, Final Report]

Corporate Author:

PURDUE UNIVERSITY

Personal Author(s):

• Arrieta Diaz, Andres

Report Date:

2021-09-27

Pagination or Media Count:

16

Abstract:

The main accomplishment of this effort were i the establishment of an analytical model allowing the efficient design of bistable elements to control the stiffness of selective compliance structures ii establishing optimization criteria to leverage the stiffness selectivity provided by embeddable bistable elements for morphing applications iii to establish a design tool based on optimization for generating morphing wing topologies with inherent stiffness selectivity iv Demonstrating with wind tunnel tests that validity of the approach and the stability of selective stiffness morphing structures under aerodynamic loads v establishing two new bioinspired methodologies for morphing structures the spring origami theory inspired by the Earwig wing and the reversible shape memory effect based on misfit pre-stress seen in the Venus fly trap and vi training five different graduate students aiding in translating state of the art morphing methods into industry. During this efforts performance period, we have published 7 journal papers and 12 peer reviewed conference papers please see details in section 4Publications. Our published work received several awards as detailed in section 3 Honors and Awards. In additions, one of the supported students, David M. Boston, spent a summer working at Wright-Patterson Base at the RT directorate under the supervision of Drs. Jeff Bauer and Richard Beblo.

Descriptors:

Subject Categories:

• Operations Research
• Structural Engineering and Building Technology
• Aircraft

Distribution Statement:

[A, Approved For Public Release]