Actuator lifetime predictions for Ni60Ti40shape memory alloy plate actuators Conference Paper uri icon

abstract

  • 2016 SPIE. Shape memory alloys (SMAs), due to their ability to repeatedly recover substantial deformations under applied mechanical loading, have the potential to impact the aerospace, automotive, biomedical, and energy industries as weight and volume saving replacements for conventional actuators. While numerous applications of SMA actuators have been flight tested and can be found in industrial applications, these actuators are generally limited to non-critical components, are not widely implemented and frequently one-off designs, and are generally overdesigned due to a lack of understanding of the effect of the loading path on the fatigue life and the lack of an accurate method of predicting actuator lifetimes. Previous efforts have been effective at predicting actuator lifetimes for isobaric dogbone test specimens. This study builds on previous work and investigates the actuation fatigue response of plate actuators with various stress concentrations through the use of digital image correlation and finite element simulations.

name of conference

  • SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring

published proceedings

  • Behavior and Mechanics of Multifunctional Materials and Composites 2016

author list (cited authors)

  • Wheeler, R., Ottmers, C., Hewling, B., & Lagoudas, D.

editor list (cited editors)

  • Goulbourne, N. C.

publication date

  • January 1, 2016 11:11 AM

publisher