Research Papers

Design of Adaptive Cores of Sandwich Structures Using a Compliant Unit Cell Approach and Topology Optimization

[+] Author and Article Information
Jiangzi Lin

School of Aeronautical, Mechanical, and Mechatronic Engineering, University of Sydney, NSW, 2006, Australiajohn.lin@aeromech.usyd.edu.au

Zhen Luo

School of Aeronautical, Mechanical, and Mechatronic Engineering, University of Sydney, NSW, 2006, Australiazluo@aeromech.usyd.edu.au

Liyong Tong1

School of Aeronautical, Mechanical, and Mechatronic Engineering, University of Sydney, NSW, 2006, Australialtong@aeromech.usyd.edu.au


Corresponding author.

J. Mech. Des 132(8), 081012 (Aug 18, 2010) (8 pages) doi:10.1115/1.4002201 History: Received March 04, 2009; Revised July 14, 2010; Published August 18, 2010; Online August 18, 2010

This paper presents a new method in designing the core layer of adaptive sandwich structures. The proposed design formulation treats the core layer as a compliant unit cell network while the unit cell network is synthesized by repeatedly linked identical compliant unit cells. Each unit cell is designed to possess shape adaptive functions independently and through the accumulation of the number of cells within the network, the global adaptive functions are accumulated also. Therefore, the network is capable of achieving large scale shape adaptations of complex profile with high fidelity. Topology optimization is used to design the compliant unit cell. Depending on the problem formulation, topology optimization can perform the simultaneous design of both the host material and the actuation material in the defined environment. This research includes a numerical case study to illustrate the technical aspects of this design philosophy. This is followed by the rapid prototyping of two scaled models and experimental validation.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.



Grahic Jump Location
Figure 1

A simple unit cell network, (left) undeformed and (right) deformed

Grahic Jump Location
Figure 6

Strain contour of actuation without S-shape actuator; left: type A and right: type B

Grahic Jump Location
Figure 7

Final prototype product of three-cell compliant network: (a) type A and (b) type B

Grahic Jump Location
Figure 8

Three-cell compliant network in single cell actuation

Grahic Jump Location
Figure 9

Position probe setup for compliant structure testing

Grahic Jump Location
Figure 10

Deformation of compliant network using FEA: (a) type A and (b) type B

Grahic Jump Location
Figure 11

Temperature variation of Nitinol spring due to Joule’s heating

Grahic Jump Location
Figure 12

Tip deflection angle versus temperature variation

Grahic Jump Location
Figure 3

Topologies for unit cell under various flexibility/stiffness priorities

Grahic Jump Location
Figure 4

Three-cell network layout before (top) and after (bottom) deformation

Grahic Jump Location
Figure 2

Design domain loading condition (left) and desired output (right)

Grahic Jump Location
Figure 5

Post-processing of topology optimization; left: type A and right: type B




Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In