The design and fabrication of meso-scale cellular contact-aided compliant mechanisms with micron sized features are presented in this paper. Cellular structures with internal contact mechanisms exhibit a reduction in stress during deformation and, thus, can be stretched further than they could without a contact mechanism. Fabricating such structures at a meso-scale can result in new high-strength, high-strain materials. Manufacturing at a meso-scale restrains the maximum aspect ratio and the initial contact gap of the mechanism. An analytical model is used to resolve the tradeoffs between these manufacturing constraints and to design suitable contact-aided cellular mechanisms. A lost mold rapid infiltration forming process is employed to fabricate meso-scale cellular mechanisms using either 316L stainless steel or a composite 316L stainless steel with nanoparticulate zirconia. A custom rig was developed to test meso-scale cellular mechanisms. The elastic modulus of 316L stainless steel was found to be about 110 ± 40 GPa both from tensile testing of test bars and from model-matching of cellular mechanisms. The cellular mechanisms were observed to exhibit about 1.1% of overall strain before any local permanent deformation. This study validates the efficacy of the design and fabrication methodology for the meso-scale cellular mechanisms.
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ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems
September 28–October 1, 2010
Philadelphia, Pennsylvania, USA
Conference Sponsors:
- Aerospace Division
ISBN:
978-0-7918-4416-8
PROCEEDINGS PAPER
Design, Fabrication, and Testing of Meso-Scale Cellular Contact-Aided Compliant Mechanisms
Vipul Mehta,
Vipul Mehta
The Pennsylvania State University, University Park, PA
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Greg Hayes,
Greg Hayes
The Pennsylvania State University, University Park, PA
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Mary Frecker,
Mary Frecker
The Pennsylvania State University, University Park, PA
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James H. Adair,
James H. Adair
The Pennsylvania State University, University Park, PA
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George A. Lesieutre
George A. Lesieutre
The Pennsylvania State University, University Park, PA
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Vipul Mehta
The Pennsylvania State University, University Park, PA
Greg Hayes
The Pennsylvania State University, University Park, PA
Mary Frecker
The Pennsylvania State University, University Park, PA
James H. Adair
The Pennsylvania State University, University Park, PA
George A. Lesieutre
The Pennsylvania State University, University Park, PA
Paper No:
SMASIS2010-3743, pp. 387-397; 11 pages
Published Online:
April 4, 2011
Citation
Mehta, V, Hayes, G, Frecker, M, Adair, JH, & Lesieutre, GA. "Design, Fabrication, and Testing of Meso-Scale Cellular Contact-Aided Compliant Mechanisms." Proceedings of the ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASME 2010 Conference on Smart Materials, Adaptive Structures and Intelligent Systems, Volume 2. Philadelphia, Pennsylvania, USA. September 28–October 1, 2010. pp. 387-397. ASME. https://doi.org/10.1115/SMASIS2010-3743
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