Thermodynamical study of the two-way shape memory effect in active composites Conference Paper uri icon

abstract

  • Explicit equations are derived for the transformation tensors that relate the composite transformation strain rate to the phase transformation rate in the fiber and matrix. For the two-way SME in a SMA fiber/elastomer matrix composite, processing-induced residual stresses alter the composite austenite start and martensite start temperatures, as well as the amount of composite strain recovered during a complete cycle of temperature and fiber martensite volume fraction. Relative to the two-way SME response of stiff-matrix composites, it is demonstrated that compliant-matrix composites: (1) Complete the phase transformation over a narrower temperature range; (2) Exhibit greater transformation strain during the reverse transformation; and (3) Undergo an incomplete strain cycle during a complete cycle of temperature and the fiber martensite volume fraction.

published proceedings

  • American Society of Mechanical Engineers, Applied Mechanics Division, AMD

author list (cited authors)

  • Boyd, J. G., & Lagoudas, D. C

complete list of authors

  • Boyd, JG||Lagoudas, DC

publication date

  • December 1994