R-phase shape memory alloy helical spring based actuators: Modeling and experiments

Pierre-Antoine Gédouin , Laurent Pino (1) , Shabnam Arbab-Chirani (1) , Sylvain Calloch (1) , Emmanuel Delaleau , Jean-Matthieu Bourgeot (1)

1 IRDL - Institut de Recherche Dupuy de Lôme

The main goal of this paper is to propose some analytical or pseudo-analytical tools facilitating the study and modeling of SMA helical spring-based actuators. Particular attention is paid to R-phase SMA helical spring-based actuators (i.e., springs made in NiTi and concerned by R-phase transformation phenomena). First, simplified models (i.e., based on beam theory framework) of R-phase SMA helical springs taking into account detwinning and assisted two-way memory effect are proposed and validated. Then, these models are used to determine the thermo-mechanical behavior of a linear bias-spring actuator. An actuator is built and used to validate the proposed models.

Keywords: Helical springs; Titanium alloys; Binary alloys; Linear transformations; Mathematical transformations; Phase transitions; Shape-memory alloy

Domains: Mechanics [physics.med-ph]; Materials

Pierre-Antoine Gédouin, Laurent Pino, Shabnam Arbab-Chirani, Sylvain Calloch, Emmanuel Delaleau, et al.. R-phase shape memory alloy helical spring based actuators: Modeling and experiments. Sensors and Actuators A: Physical , 2019, 289, pp.65-76. ⟨10.1016/j.sna.2019.02.024⟩. ⟨hal-02090256⟩