A Numerical Method to Model Non-linear Damping Behaviour of Martensitic Shape Memory Alloys

The Cu-11Al-5Ni-4Fe wt% alloy was consolidated by additive manufacturing (AM) to determine the method applicability for producing shape memory alloy. The alloy was researched through compressive stress in three conditions: commercial (cast), as-built, and as-built heat treated (quenched). The results demonstrated that the as-built sample acquired a reasonable superelasticity at room temperature (~4%), which was improved to 6% after quenching. The commercial sample damping capacity was better at high temperatures (350 °C) due to slip system activation at low stress (near 600 MPa), which resulted in a higher deformation energy dissipation. Due to the residual stress and null slip activation, the as-built samples showed low damping capacity and low permanent strain at any temperature; however, they showed greater degree of superelasticity. The AM technique of laser powder bed fabrication is concluded to be a viable option for producing printed parts with superelasticity and damping properties.

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“…where ∆W corresponds to the hysteresis enclosed area and W the total area under load stress [48,49].…”

Section: Mechanical Evaluationmentioning

confidence: 99%

Applicability of LPBF for producing Cu-11Al-5Ni-4Fe wt.% with shape memory properties

Guerra

Ramos‐Grez

Fé-Perdomo

et al. 2023

Smart Mater. Struct.

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“…2(a, b). The 'HSs' model is non-linear soil model under cyclic loading, which followed Masing's rule [9,10], the hardening plasticity accounts for more rapidly decaying small-strain stiffness during initial loading, therefore, the mechanic features showing in Fig. 2(c).…”

Section: Materials Model Demonstrationmentioning

confidence: 99%

Numerical study on bored Pile-Soil interaction by specified constitutive model in coastal engineering (design)

Xie¹

2022

Mater. sci. eng., appl.

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In Geo-engineering design, Geotech-engineers usually adopt ‘Mohr-Coulomb model (M-C)’ to substitute most soil material, this model is considered as linear elastic and perfectly plastic model, despite, in the coastal engineering, the sand-clay mixed with water, cement, fine aggregate or similar materials are the most common interface medium among soil and pile bodies, the frictions from them have strong affection on piles settlements, due to their complex components and mechanics, never can simulate these interface medium by ‘M-C model’ easily, hereby, the novelty of this article is that author adopt ‘Hardening soil constitutive model (HSs)’ as the interface medium and deployed numerical studies on its application in practical case, the studies included simulating the mechanic behaviors among soil and piles(morphology of deformation), design assumptions based on the analysis of geotechnic report and empirical views, besides compared the pile settlement curves by ‘M-C’ and ‘HSs’ models with the static loads test results, and identified the ‘HSs’ model is a suitable constitutive model for sand-clay mixture soil in this Geo project design. In the end, author proposed a few conclusions about the medium birth mechanism, criteria of model selection and advice for similar engineering reference.

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“…Further studies focused on the analytical [ 78 , 79 , 80 , 81 , 82 , 83 , 84 , 85 , 86 ], numerical [ 59 , 65 , 66 , 79 , 81 , 87 , 88 , 89 , 90 , 91 , 92 , 93 ], and experimental [ 54 , 59 , 65 , 66 , 78 , 79 , 80 , 90 , 91 , 92 , 93 , 94 , 95 , 96 , 97 , 98 , 99 , 100 , 101 ] investigation of SMA-based smart structures. Indeed, SMA were used as axial [ 91 ], flexural [ 54 , 65 , 66 , 93 , 98 , 99 , 100 ], twisting [ 94 , 95 ], or non-planar [ 79 , 96 ] actuators.…”

Section: Overview Of the State Of The Art Of Sma Actuatorsmentioning

confidence: 99%

Overview and Future Advanced Engineering Applications for Morphing Surfaces by Shape Memory Alloy Materials

Sellitto

Riccio

2019

Materials

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The development of structures able to autonomously change their characteristics in response to an external simulation is considered a promising research field. Indeed, these structures, called smart structures, can be adopted to improve the aerodynamic performance of air and land vehicles. In this work, an overview and future applications of Shape Memory Alloys (SMA)-based smart structures are presented. The use of SMA materials seems to be very promising in several engineering sectors. Advanced SMA-based devices, designed to improve the aerodynamic performance of vehicles by modifying the shape of the spoiler and the rear upper panel, are briefly introduced and discussed in this paper. Indeed, a simplified model simulating the SMA mechanical behavior has been considered to demonstrate the feasibility of the introduced smart structures for adaptive aerodynamic applications. Numerical simulations of the investigated structures are provided as a justification of the proposed designs.

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A Numerical Method to Model Non-linear Damping Behaviour of Martensitic Shape Memory Alloys

Cited by 10 publications

References 39 publications

Applicability of LPBF for producing Cu-11Al-5Ni-4Fe wt.% with shape memory properties

Applicability of LPBF for producing Cu-11Al-5Ni-4Fe wt.% with shape memory properties

Numerical study on bored Pile-Soil interaction by specified constitutive model in coastal engineering (design)

Overview and Future Advanced Engineering Applications for Morphing Surfaces by Shape Memory Alloy Materials

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