Shape memory alloys (SMA) for automotive applications and challenges

Riccio, Aniello; Sellitto, Andrea; Ameduri, Salvatore; Concilio, Antonio; Arena, Maurizio

doi:10.1016/b978-0-12-819264-1.00024-8

Cited by 21 publications

(11 citation statements)

References 29 publications

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“…SMAs are metal alloys that can be deformed when cold but return to their predeformed (“remembered”) shape when heated. , The underlying mechanism involves crystalline phase transformation which depends on temperature . An SMA is shaped in a mold (in our case, a flat mold), annealed at high temperatures, and then quenched with water.…”

Section: Thermally Actuated Shape-memory Alloy For Flexible Solar Cel...mentioning

confidence: 99%

Toward Rollable Printed Perovskite Solar Cells for Deployment in Low-Earth Orbit Space Applications

Angmo,

Yan,

Liang

et al. 2024

ACS Appl. Energy Mater.

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The thin physical profile of perovskite-based solar cells (PSCs) fabricated on flexible substrates provides the prospect of a disruptive increase in specific power (power-to-mass ratio), an important figure-of-merit for solar cells to be used in space applications. In contrast to recent reports on space applications of PSCs which focus on rigid glass-based devices, in this work we investigate the suitability of flexible PSCs for low-earth orbit (LEO) applications, where the perovskite layer in the PSCs was prepared using either a Ruddlesden−Popper precursor composition (BA 2 MA 3 Pb 4 I 13 ; BA = butylammonium, MA = m e t h y l a m m o n i u m ) o r a m i x e d -c a t i o n p r e c u r s o r c o m p o s i t i o n (Cs 0.05 FA 0.81 MA 0.14 Pb 2.55 Br 0.45 ; FA = formamidinium). The flexible PSC devices display a tolerance to high-energy proton (14 MeV) and electron (>1 MeV) radiation comparable with, or superior to, equivalent glass-based PSC devices. The photovoltaic performance of the PSCs is found to be significantly less dependent on angle-of-incidence than GaAs-based triple-junction solar cells commonly used for space applications. Results from a preliminary test of the robustness of the perovskite film when subjected to LEO-like thermal environments are also reported. In addition, a unique deployment concept integrating printed flexible solar cells with titanium−nickel based shape memory alloy ribbons is presented for thermally actuated deployment of flexible solar cells from a rolled state.

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Section: Thermally Actuated Shape-memory Alloy For Flexible Solar Cel...mentioning

confidence: 99%

Toward Rollable Printed Perovskite Solar Cells for Deployment in Low-Earth Orbit Space Applications

Angmo,

Yan,

Liang

et al. 2024

ACS Appl. Energy Mater.

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“…Their amazing capacity to morph in response to external stimuli, whether owing to temperature changes or mechanical stresses, has shown to be an invaluable trait. This malleability paves the way for more effective and safe airplane and automotive operations, delivering advancements in aerodynamic features, fuel efficiency, and the overall dependability of these vital systems, ultimately determining the future of transportation technologies [30][31][32][33]…”

Section: Emerging Trendsmentioning

confidence: 99%

Introductory Chapter: Introduction to Shape Memory Alloys

Asaduzzaman Chowdhury,

Hossain,

Hosne Mobarak

2024

Shape Memory Alloys - New Advances

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“…A novel material recently used for the out-of-plane reinforcement of structural composite joints is the shape memory alloy (SMA), whose filaments can be tufted through the thickness of the laminate to improve the mechanical strength, delamination resistance and fracture toughness [20,22,[25][26][27][28][29]. SMAs also exhibit the shape memory effect, so that their combined thermo-electrical and thermo-mechanical properties make them suitable for a wide range of applications [30][31][32][33][34][35][36][37]. Studies have shown that by using SMAs for the out-of-plane reinforcement of CFRP composites, in addition to the improvement in delamination resistance, SMAs tufted within the laminate exhibited crack closure properties [21,22,38].…”

Section: Introductionmentioning

confidence: 99%

Material-Enabled Impact Detection and Damage Localisation System Using Shape Memory Alloy Tufted Composites

Adeyemi,

Khor,

Ciampa

2023

Sensors

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Shape memory alloy (SMA) tufted composites have shown a significant improvement of the mechanical strength, fracture toughness, and delamination resistance of structural joints. This paper investigated the self-sensing functionality of SMA tufted carbon/epoxy composite T-joints to enable in situ strain monitoring for the detection of low-velocity impacts. Indeed, large deformations in the tufted composite due to impacts caused abrupt changes in electrical resistance of SMA filaments, which were used to trigger the detection system. An Arduino Mega controller was programmed to simultaneously extract and process real-time electrical resistance recordings from SMA tufts during impact tests conducted at 5 J and 10 J. Experimental results showed that the proposed SMA-enabled detection system can capture accurately the time of the impact and localise the delamination onset, thus demonstrating the truly multifunctional capabilities of proposed SMA tufted composites.

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Shape memory alloys (SMA) for automotive applications and challenges

Cited by 21 publications

References 29 publications

Toward Rollable Printed Perovskite Solar Cells for Deployment in Low-Earth Orbit Space Applications

Toward Rollable Printed Perovskite Solar Cells for Deployment in Low-Earth Orbit Space Applications

Introductory Chapter: Introduction to Shape Memory Alloys

Material-Enabled Impact Detection and Damage Localisation System Using Shape Memory Alloy Tufted Composites

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