Thanks to their peculiar morphing capabilities, Shape Memory Alloys (SMA) materials are being increasingly adopted in many engineering fields, such as automotive and aerospace. Indeed, their pseudo-elastic behavior and their shape memory effect, which allows the recovery of an initial state after a deformation, make them particularly suitable for switch actuators and morphing structures applications. In this work, the behavior of SMAs is investigated. Then, a user defined material model (UMAT) has been implemented in the Abaqus Standard Finite Element (FE) environment to numerically simulate the behavior of SMAs, including their pseudo-elastic behavior and shape memory effect. The material model, validated by means of comparisons with analytical data, has been used to investigate the feasibility of a bi-stable biased actuator operated by SMA springs.
Modeling the Behavior of Shape Memory Alloys and Memory Alloy-Based Devices
Riccio, Aniello;Sellitto, Andrea
2021
Abstract
Thanks to their peculiar morphing capabilities, Shape Memory Alloys (SMA) materials are being increasingly adopted in many engineering fields, such as automotive and aerospace. Indeed, their pseudo-elastic behavior and their shape memory effect, which allows the recovery of an initial state after a deformation, make them particularly suitable for switch actuators and morphing structures applications. In this work, the behavior of SMAs is investigated. Then, a user defined material model (UMAT) has been implemented in the Abaqus Standard Finite Element (FE) environment to numerically simulate the behavior of SMAs, including their pseudo-elastic behavior and shape memory effect. The material model, validated by means of comparisons with analytical data, has been used to investigate the feasibility of a bi-stable biased actuator operated by SMA springs.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.