Design of Flexible Rods with Embedded SMA Actuators

Abstract

The shape change of a stress free cylindrical flexible rod with embedded SMA actuators is modeled in this paper for rods with single or multiple SMA actuators placed parallel to the long axis of the rod for the first heating the SMA actuators. The distributed axial compressive force, transverse normal force, and bending moments that act on the rod due to the shape recovery of the SMA actuators have been given by Lagoudas and Tadjbakhsh. The deformed shape of the rod is found by solving the nonlinear equations of equilibrium of the rod. For multiple actuators the resultant forces and moments are considered. A design analysis is performed for the active rod with a single SMA actuator. Key design variables are Erod, the thermal bond strength of the rod to the SMA actuator, and the rod dimensions. Key design parameters are: maximum rod/actuator interfacial shear stress, rod strain, rod slenderness ratio, and rod deflection. An analysis is then performed which investigates the influence of the design variables on each of the design parameters.

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Document Details

Document Type
Technical Report
Publication Date
Jan 18, 1993
Accession Number
ADA260742

Entities

People

  • Dimitris C Lagoudas
  • H. J. Pfaeffle
  • Iradj Tadjbakhsh
  • Kevin C. Craig

Organizations

  • Rensselaer Polytechnic Institute

Tags

DTIC Thesaurus Topics

  • Bending Moments
  • Control Theory
  • Coordinate Systems
  • Deflection
  • Differential Equations
  • Engineering
  • Equations
  • Materials
  • Materials Processing
  • Materials Science
  • Materials Testing
  • Modulus Of Elasticity
  • Phase Transformations
  • Shear Stresses
  • Stresses
  • Tensile Testing
  • Transition Temperature

Fields of Study

  • Physics

Readers

  • Marine Propulsion Engineering and Naval Architecture
  • Robotics and Automation.
  • Structural Dynamics.