Design of a Shape Memory Alloy Actuated Compliant Smart Structure: Elastica Approach
- 21 May 2009
- journal article
- Published by Wiley in Journal of Mechanical Design
- Vol. 131 (6) , 061008
Abstract
Large displacement static analysis of a fully compliant spatial mechanism is presented here. This mechanism is made up of a superelastic nitinol pipe as its compliant structural member and actuated by three shape memory alloy (SMA) wires. The coupled effect of the force developed by the SMA actuation and the force required for elastica deflection is simplified by incorporating the geometric parameters of the mechanism using a deflection plane approach. An iterative algorithm with elliptical integration has been developed, which is suitable for a wider range of actual and arbitrary inputs. The solutions are obtained for the effect of one-wire and two-wire actuation methods. Results obtained from the deflection plane approach and simulation have been compared and found that the relative error is less than 1% within the safe operating range of 5% strain value recommended for SMA actuators. Based on the analytical and simulation inputs, the mechanism is miniaturized further with the aim of increasing its workspace and is fabricated for further experimental investigations.Keywords
This publication has 31 references indexed in Scilit:
- Numerical simulation of a double SMA wire actuator using the two-way shape memory effect of SMASmart Materials and Structures, 2007
- Non-isothermal finite element modeling of a shape memory alloy actuator using ANSYSComputational Materials Science, 2006
- Three-dimensional thermomechanical modeling of pseudoelasticity in shape memory alloys with different elastic properties between austenite and martensiteMaterials Science and Engineering: A, 2006
- Finite element simulation of SMA microactuators with large deflectionJournal de Physique IV, 2004
- Analysis of active vibration control in smart structures by ANSYSSmart Materials and Structures, 2004
- The work production of shape memory alloySmart Materials and Structures, 2004
- Design of a Lightweight Hyper-Redundant Deployable Binary ManipulatorJournal of Mechanical Design, 2004
- Design of a Parallel Robot Actuated by Shape Memory Alloy WiresMATERIALS TRANSACTIONS, 2002
- A Simple and Accurate Method for Determining Large Deflections in Compliant Mechanisms Subjected to End Forces and MomentsJournal of Mechanical Design, 1998
- On the Nomenclature, Classification, and Abstractions of Compliant MechanismsJournal of Mechanical Design, 1994