Numerical simulation of the mechanical behaviour of shape memory alloys based actuators

Saputo, Salvatore; Sellitto, Andrea; Battaglia, Miriam; Sebastiano, Vincenzo; Riccio, Aniello

doi:10.1016/j.matpr.2020.01.185

Cited by 6 publications

(4 citation statements)

References 8 publications

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“…In the models of the previous two sections, the SMA spring model and the constitutive model describe the SME and material properties of a single spring. In the SAU design, the two springs are antagonistic structures [59,69,70], that is, alternating heating, alternating force and torque output, and reciprocating motion of the output axis. During the differentiation from SAU to DAU, the springs of the actuator are set with a pre-bias to generate residual strain, and the bias can be expressed as:…”

Section: Appendix C Kinematic and Dynamic Modelsmentioning

confidence: 99%

A differentiable actuator extends potential configurations of modular robots

Li,

Zhang,

Liang

et al. 2024

Smart Mater. Struct.

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Mesenchymal stem cells can be differentiated into various cell lineages under the influence of mechano-niche. Inspired by this approach, this study presents a differentiable stem cell actuator unit (SAU) driven by a shape memory alloy (SMA), and a modular robotic framework. Similar to mechanically guided differentiation of mesenchymal stem cells, SAUs can be differentiated into a series of differentiated actuator units (DAUs) under external preload. This process has been modeled, simulated, and experimentally validated, with testing conducted on three distinct types and 14 specifications of DAUs. DAUs weighing as light as 1.9g exhibited outputs reaching up to 10.6N and 46.32Nmm. Our team has developed seven application prototypes based on this bio-inspired framework including mobile robots, manipulators and end effectors. This work pioneers the integration of differentiable concepts and principles into the design of modular robots, enabling a wider range of potential configurations and capabilities.

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Section: Appendix C Kinematic and Dynamic Modelsmentioning

confidence: 99%

A differentiable actuator extends potential configurations of modular robots

Li,

Zhang,

Liang

et al. 2024

Smart Mater. Struct.

View full text Add to dashboard Cite

show abstract

“…Saputo et al [38] used a UMAT including two phases in the ABAQUS standard finite element code environment to consider both the shape memory effect and the pseudo-elastic behavior of SMA springs.…”

Section: Mathematical Modelmentioning

confidence: 99%

“…In Ameduri's research [37], a descriptive finite element model underwent an optimization process performed using a proprietary code to increase the airfoil trailing edge curvature. Saputo et al [38] used a UMAT including two phases in the ABAQUS standard finite element code environment to consider both the shape memory effect and the pseudo-elastic behavior of SMA springs.…”

Section: Introductionmentioning

confidence: 99%

Design of a Morphing Skin with Shape Memory Alloy Based on Equivalent Thermal Stress Approach

Zhang

Gao

et al. 2022

Micromachines

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Shape memory alloy (SMA) is one of the potential driving devices for morphing aircraft due to its advantages of pseudoelasticity, superelasticity, and shape memory effect. Precise and fast analysis of SMA has simultaneously become a key requirement for industrial applications. In this study, a user-defined material subroutine (UMAT) was implemented and successfully applied in a three-dimensional numerical simulation in ABAQUS based on the extended Boyd–Lagoudas model. In addition to the conventional detwinned martensite (Md) and austenite (A), twinned martensite (Mt) was also considered to model the practical transformation accurately. Then, the equivalent thermal strain approach was adopted to simplify the simulation complexity with UMAT. By resetting the thermal expansion coefficient, the thermal strain equivalent to the original phase transformation strain was generated. The approach was validated in two cases, showing consistent results with the extended Boyd–Lagoudas model and reduction in time consumption by 89.1%. Lastly, an active morphing skin integrating the single-range SMA and a stainless-steel plate was designed to realize two-way morphing. The calculated arc height variation of the skin was 3.74 mm with a relative error of 1.84% compared to the experimental result of 3.81 mm. The coupled use of UMAT and the equivalent thermal stress approach helped to reduce the challenge in modeling SMA.

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“…In medicine, shape memory polymer (SMP) films are used as membranes for dosage forms [ 1 , 2 ], drug delivery systems [ 3 , 4 , 5 ], smart sutures and stents [ 6 ], in multiple cardiovascular applications [ 7 , 8 ], for antibacterial functions [ 9 ], and minimally invasive surgeries [ 10 ]. In aerospace [ 11 , 12 , 13 ], SMMs are used as active load-bearing elements in deployable panels [ 14 ], release devices during rocket launches [ 15 ], noise-reducing jet nozzles [ 16 ], aerodynamic load suppression systems [ 16 , 17 ], bilinear controllers [ 18 ], phase-changing light-responsive components [ 19 ], and various actuators [ 20 , 21 , 22 ]. In the automotive industry [ 23 , 24 ], SMMs can adjust mirrors [ 25 ], are used in battery cells [ 26 ], in electric motors [ 27 ], and in rotary engines [ 28 ].…”

Section: Introductionmentioning

confidence: 99%

Recording, Storage, and Reproduction of Information on Polyvinyl Chloride Films Using Shape Memory Effects

et al. 2021

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Partial dissolution and plasticization are used for recording, storing, and reproducing information with modified industrial screen-printing equipment and aqueous solutions of colorless organic liquids on small surface area shape memory polymer films. To justify the choice of “ink” and evaluate the effectiveness of using organic liquids as high-speed polymer solvents, the new method for recording hidden information uses the calculation of the solubility parameter, differential scanning calorimetry, and the method of one-sided swelling of films under isometric conditions. Using the example of tactile marking of shrink labels made of polyvinyl chloride, the optimal conditions for recording hidden information on a film are established in terms of the concentration of an aqueous solution of tetrahydrofuran, the contact time, and the processing temperature of the polymer using screen printing equipment.

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Numerical simulation of the mechanical behaviour of shape memory alloys based actuators

Cited by 6 publications

References 8 publications

A differentiable actuator extends potential configurations of modular robots

A differentiable actuator extends potential configurations of modular robots

Design of a Morphing Skin with Shape Memory Alloy Based on Equivalent Thermal Stress Approach

Recording, Storage, and Reproduction of Information on Polyvinyl Chloride Films Using Shape Memory Effects

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