Design of a Telescopic Linear Actuator Based on Hollow Shape Memory Springs

Spaggiari, Andrea; Spinella, Igor; Dragoni, Eugenio

doi:10.1007/s11665-011-9872-9

Cited by 10 publications

(5 citation statements)

References 6 publications

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“…IS 7906-1 [4] lays down calculations for design of helical compression springs made from circular section wire and bar. Andrea Spaggiari, Igor Spinella, And Eugenio Dragoni [5] focused on the design of a large-scale linear SMA actuator conceived to maximize the stroke while limiting the overall size and the electric consumption. This result is achieved by adopting for the actuator a telescopic multi-stage architecture and using SMA helical springs with hollow cross section to power the stages.…”

Section: Literature Reviewmentioning

confidence: 99%

Weight Optimization of Stainless Steel (SS304) Helical Spring

2023

IJFMR

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This study deals with the elaborate design optimization technique for helical compression spring with analytical method. Concentration is made on reducing weight of helical compression spring keeping the induced stresses within permissible limits. The spring is acted upon by compressive force so the spring gets compressed. The entitled work comprises, design of helical compression spring made from wire of solid circular section for a problem and optimizing the weight of solid wire spring by redesigning it with hollow circular section instead of solid circular section. After analytical design procedure the solid wire spring and optimized spring (i.e. spring made from hollow circular wire) are manufactured. After manufacturing of springs, analytical results are validated experimentally and in ANSYS.

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Section: Literature Reviewmentioning

confidence: 99%

Weight Optimization of Stainless Steel (SS304) Helical Spring

2023

IJFMR

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“…Examples of application of the methods are found in the technical literature. [123][124][125][126][127][128][129] Basic design methods of the main architectures. To design SMA actuators, a material model must describe the mechanical behaviour of the alloy in two temperature ranges: below the temperature M f , at which the austenite-martensite transformation is finished (OFF or deactivated or cold state) and above the temperature, A f , at which the martensite-austenite transformation is completed (ON or activated or hot state).…”

Section: Smasmentioning

confidence: 99%

Smart materials: Properties, design and mechatronic applications

Spaggiari

Castagnetti

Golinelli

et al. 2016

Proceedings of the Institution of Mechanical Engineers, Part L:

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This paper describes the properties and the engineering applications of the smart materials, especially in the mechatronics field. Even though there are several smart materials which all are very interesting from the research perspective, we decide to focus the work on just three of them. The adopted criterion privileges the most promising technologies in terms of commercial applications available on the market, namely: magnetorheological fluids, shape memory alloys and piezoelectric materials. Many semi-active devices such as dampers or brakes or clutches, based on magnetorheological fluids are commercially available; in addition, we can trace several applications of piezo actuators and shape memory-based devices, especially in the field of micro actuations. The work describes the physics behind these three materials and it gives some basic equations to dimension a system based on one of these technologies. The work helps the designer in a first feasibility study for the applications of one of these smart materials inside an industrial context. Moreover, the paper shows a complete survey of the applications of magnetorheological fluids, piezoelectric devices and shape memory alloys that have hit the market, considering industrial, biomedical, civil and automotive field

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“…The unique properties of shape memory and superelasticity are due to a solid-state martensitic transformation from a high symmetry, high-temperature phase known as austenite to a low-temperature, low symmetry martensite phase (Lagoudas, 2008). These recently revealed materials also benefit from other properties such as high force-to-weight ratio, biocompatibility, silent response, and smooth and life-like operations, which cause them to gain an immense attention in many real-life engineering applications from biomedical to aerospace fields (Bergamasco et al, 1990; Hartl et al, 2010; Khidir et al, 2007; Kim et al, 2006; Kuribayashi, 1989; Migliavacca et al, 2002; Spaggiari et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

Finite element simulation of shape memory alloy wires using a user material subroutine: Parametric study on heating rate, conductivity, and heat convection

Alipour

Kadkhodaei

Ghaei

2014

Journal of Intelligent Material Systems and Structures

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In this work, the thermal and mechanical responses of shape memory alloys are studied under different loading and boundary conditions. To this end, a common one-dimensional constitutive model for shape memory alloys capturing both pseudoelasticity and shape memory effect is implemented into ABAQUS commercial finite element package via a user material subroutine. The main benefit of this one-dimensional user material is its capability to simulate any mechanical as well as thermal loading path. Hence, it can be utilized in finite element simulation of any complicated smart structure consisting of shape memory alloy wires. To validate the proposed numerical approach, its predictions are shown to be in a good agreement with those obtained by analytical and other approved numerical solutions under different thermal and mechanical loading and boundary conditions. Since shape memory alloys are integrated into many applications as actuation elements, the actuation response of an axial shape memory alloy actuator heated from one end is studied using finite element method. Finally, the developed user material is employed in finite element simulation of a smart landing gear as a real-world smart structure.

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Design of a Telescopic Linear Actuator Based on Hollow Shape Memory Springs

Cited by 10 publications

References 6 publications

Weight Optimization of Stainless Steel (SS304) Helical Spring

Weight Optimization of Stainless Steel (SS304) Helical Spring

Smart materials: Properties, design and mechatronic applications

Finite element simulation of shape memory alloy wires using a user material subroutine: Parametric study on heating rate, conductivity, and heat convection

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