An investigation of shape memory alloys as actuating elements in aerospace morphing applications

Karagiannis, Dimitrios; Stamatelos, Dimtrios; Kappatos, Vassilios; Σπαθόπουλος, Θεόδωρος

doi:10.1080/15376494.2016.1196772

Cited by 19 publications

(8 citation statements)

References 18 publications

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“…When the application convenience is considered for SMAs, any case where super-elasticity or shape memory is relevant can be thought. It is not uncommon to have SMAs as actuators in aerospace applications for shape-morphing of aero-foils [64] or for the simplification and compactness of UAV actuation [65]. The super-elasticity and shape memory property of SMAs also make them an excellent actuator choice for biomedical applications [62].…”

Section: Modality Of Operationmentioning

confidence: 99%

An Overview of Novel Actuators for Soft Robotics

2018

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In this systematic survey, an overview of non-conventional actuators particularly used in soft-robotics is presented. The review is performed by using well-defined performance criteria with a direction to identify the exemplary and potential applications. In addition to this, initial guidelines to compare the performance and applicability of these novel actuators are provided. The meta-analysis is restricted to five main types of actuators: shape memory alloys (SMAs), fluidic elastomer actuators (FEAs), shape morphing polymers (SMPs), dielectric electro-activated polymers (DEAPs), and magnetic/electro-magnetic actuators (E/MAs). In exploring and comparing the capabilities of these actuators, the focus was on eight different aspects: compliance, topology-geometry, scalability-complexity, energy efficiency, operation range, modality, controllability, and technological readiness level (TRL). The overview presented here provides a state-of-the-art summary of the advancements and can help researchers to select the most convenient soft actuators using the comprehensive comparison of the suggested quantitative and qualitative criteria.

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Section: Modality Of Operationmentioning

confidence: 99%

An Overview of Novel Actuators for Soft Robotics

2018

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“…In wing design itself, some major topics include (1) design for shape optimization [ 32 , 33 , 34 , 35 , 36 ], (2) design for aerodynamic optimization [ 37 , 38 , 39 ], (3) design for aero-structure optimization [ 40 , 41 , 42 ], and (4) manufacturing process development [ 43 , 44 , 45 ]. In the focus of morphing mechanism development, topics such as (1) material selection and analysis [ 46 , 47 , 48 , 49 , 50 , 51 ], (2) structure and solid mechanics development [ 50 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 ], (3) smart materials for actuation [ 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 ], and (4) conventional actuators for morphing [ 61 , 66 , 67 ] are primary. In morphing wing analysis regarding design and implementation, (1) analytical or experimental modeling, (2) validation [ 43 , 68 , 69 , 70 , 71 ], (3) performance and characteristics analysis [ 72 , …”

Section: Introductionmentioning

confidence: 99%

Enhanced Range and Endurance Evaluation of a Camber Morphing Wing Aircraft

Joe

Majid

2023

Biomimetics

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Flight range, endurance, maneuverability, and agility are the key elements that determine an aircraft’s performance. Both conventional and morphing wing aircraft have been well studied and estimated in all aspects of performance. When considering the performance of morphing aircraft, most works address aspects of the aerodynamical performance such as L and D as well as flight envelopes for flight dynamics and control perspectives. However, the actual benefits of adopting morphing technologies in practical aspects such as aircraft operation, mission planning, and sustainability have not been addressed so far. Thus, this paper addresses the practical aspect of the benefits when adopting a camber morphing wing aircraft. Identical geometrical and computational conditions were applied to an already-existing aircraft: the RQ-7a Shadow. The wing structure was switched between a fixed wing and a camber morphing wing to generate conventional and morphing wing geometries. The fixed-wing cases had varying flap deflection angles, and the camber morphing wing cases had varying camber rates from 4% to 8%. Once the CL values of the fixed and morphing wing cases were matched up to two significant figures, the CD and CL/CD were analyzed for these matching cases to calculate the flight endurance, range, and improvement. When NACA 6410 is adopted, a 17% improvement in flight range and endurance average was expected. In the case of NACA 8410, an average 60% improvement was expected.

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“…Characteristic research within this research field is carried out by NASAs Morphing program 35 and DARPAs SMART Wing Project, 19 where smart materials, such as SMAs materials and eccentuators (design driven by ultrasonic piezoelectric motors), have been employed to achieve morphing of aerodynamic surfaces and low frequency morphing architectures. Karagiannis et al 36 in the SMyLE project investigated two concepts for LE morphing (a) the feasibility of a laminated composite skin with embedded SMA wires and (b) they also developed a compliant mechanism for the rib structure actuated with SMA wires, so that LE morphing can be obtained.…”

Section: Introductionmentioning

confidence: 99%

A structural design approach for a droop nose morphing demonstrator with shape memory alloy patches

Stamatelos

Kappatos

2022

Proceedings of the Institution of Mechanical Engineers, Part G:

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An innovative concept has been devised for assisting an actuator to morph a Droop Nose (DN) structure, which is comprised from the skin and three longitudinal omega stringers. The concept is based on the development of a suitable composite patch, with embedded shape memory alloy (SMA) wires, and the appropriate design of a DN configuration for morphing purposes. The integration of composite patches, to the DN structure, has a dual innovative role: (a) it can either provide/extend the morphing capabilities of the structure, in terms of displacement or (b) it can reduce the required actuation forces for obtaining morphing of the DN structure. For determining the most suitable DN configuration, for the application, a sensitivity analysis, with the aid of ANSYS finite element (FE) software and a design of experiments (DoE) approach, has been carried out. The investigated parameters (geometrical and lamination characteristics) are selected to vary the stiffness of the DN structure. Additionally, a numerical parametric FE model, of the SMA patch and its configuration, is developed and analysed. The developed FE models simulated the shape memory effect of SMA wires considering their activation temperature and hence their thermo-mechanical behaviour. Eventually, a possible integration of the SMA patches to the DN structure is proposed and the respective remarks are highlighted.

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An investigation of shape memory alloys as actuating elements in aerospace morphing applications

Cited by 19 publications

References 18 publications

An Overview of Novel Actuators for Soft Robotics

An Overview of Novel Actuators for Soft Robotics

Enhanced Range and Endurance Evaluation of a Camber Morphing Wing Aircraft

A structural design approach for a droop nose morphing demonstrator with shape memory alloy patches

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