Tailored bistability in mechanically pre-stressed laminated composites through planform design

Venkata Siva C. Chillara; Marcelo J. Dapino

doi:10.1117/12.2514331

29 March 2019 Tailored bistability in mechanically pre-stressed laminated composites through planform design

Venkata Siva C. Chillara, Marcelo J. Dapino

Proceedings Volume 10968, Behavior and Mechanics of Multifunctional Materials XIII; 1096811 (2019) https://doi.org/10.1117/12.2514331
Event: SPIE Smart Structures + Nondestructive Evaluation, 2019, Denver, Colorado, United States

Abstract

Bistable composites are attractive for morphing structures because they can hold deformed shapes without actuation and can be driven by compact, embedded smart actuators such as piezoelectric laminae and shape memory alloys. Mechanically-prestressed bistable composites exhibit weakly-coupled cylindrical shapes when their prestressed laminae are orthogonal to each other. High-order analytical models have been developed to model the stability and actuation of mechanically-prestressed composites with two sources of residual stress. Based on these models, this paper presents a study on the effect of planform shape on shape-bifurcation phenomena in bistable plates. A high-order analytical model is presented and the shapes of composites with linearly-tapered planform are calculated. Model-based parametric studies are presented to calculate the sensitivity of stable shapes and actuation forces to variations in planform taper, spatial positions of the prestressed layers, and aspect ratio. The results guide the selection of geometric parameters for the design of bistable composites.

Conference Presentation

Citation Download Citation

Venkata Siva C. Chillara and Marcelo J. Dapino "Tailored bistability in mechanically pre-stressed laminated composites through planform design", Proc. SPIE 10968, Behavior and Mechanics of Multifunctional Materials XIII, 1096811 (29 March 2019); https://doi.org/10.1117/12.2514331

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available