Design of SMA-Based Structural Actuators

Shape memory alloys (SMAs) are a group of metallic alloys capable of sustaining large inelastic strains that can be recovered when subjected to a specific process between two distinct phases. Advantages of SMAsreasonable strain, high energy density, mechanical simplicity, and long work-life render them ideal for actuator applications. Especially, Self-folding origami requires high angular motion ranges and low-profile actuators within limited space. Current applications demonstrate the capacity of millimeter-sized torsional SMAs (T-SMAs) for bi-directional rotational motion, but no comprehensive design method for such actuators can be found in the existing literature. To broaden applications of actuator designs, we introduce an inverse design model according to a geometrico-static demand. We couple the geometrical and mechanical properties of torsional SMAs considering assembly and working conditions to construct the design model. We also illustrate a comprehensive mechanical performance characterization for millimeter-sized torsional SMAs and BRM actuators.

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Design of SMA-Based Structural Actuators

Cited by 2 publications

References 14 publications

Design and optimization of the cooling process to rapid control a SMA-based wave generator

Design and optimization of the cooling process to rapid control a SMA-based wave generator

Design of a bidirectional rotational motion actuator by SMA with geometrico-static requirements

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