Improving acoustic streaming effects in fluidic systems by matching SU-8 and polydimethylsiloxane layers

Catarino, Susana Oliveira; Minas, Graça; Miranda, J. M.

doi:10.1016/j.ultras.2016.03.010

Cited by 3 publications

(1 citation statement)

References 35 publications

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“…Considering their characteristics, multifunctional materials, such as piezoelectric, electrostrictive and magnetostrictive, are used in the development of sensor and actuator devices. Particularly, the piezoelectric materials convert mechanical strain into electric field (both linearly and inversely) [24][25][26], the electrostrictive materials convert the same physical entities but with a non-linear relationship [27] and the magnetostrictive materials convert, reciprocally, mechanical and magnetic entities [23,28,29]. When compared to piezoelectric materials, magnetostrictive smart materials have the advantage of withstanding high temperature (below Curie temperature) and high-pressure environments without loss of magnetostrictive performance, and do not need re-polarization of the material after a significant increase of temperature (as it is required in piezoelectric materials).…”

Section: Introductionmentioning

confidence: 99%

Modelling and numerical simulation of magnetostrictive materials for reduction of friction

et al. 2022

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This study aims to enhance the multifunctional properties in top piston rings by adding magnetostrictive materials to reduce friction between them and the cylinder lining. The magnetostrictive effect will create mechanical deformations in piston rings, with consequent friction reduction. The present study consisted of a finite element analysis (FEA), using COMSOL Multiphysics® software, where both the amplitude of deformation and the reduction of the contact forces were analysed. These variables are useful to predict the ability to introduce mechanical vibrations in piston rings that can lead to the reduction of friction. The results showed a reduction of the contact force below 4%, and deformation amplitudes in the sliding plane of 6.50 μm and 3.20 μm, approximately, in the axial and circumferential directions, respectively. Those results are promising, enhancing the potential of smart materials and magnetostrictive effects to create mechanical vibrations and reduce friction in piston ring structures.

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Section: Introductionmentioning

confidence: 99%

Modelling and numerical simulation of magnetostrictive materials for reduction of friction

et al. 2022

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Microstructure and Mechanical Properties of Ultrasound-Assisted Soldered Al-50 wt.%Si/Al-27 wt.%Si Joints for Automotive Applications

Lang

Wang

et al. 2019

JOM

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Interactions at the planar Ag3Sn/liquid Sn interface under ultrasonic irradiation

Shao

Bao

et al. 2017

Ultrasonics Sonochemistry

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The interactions at the interface between planar AgSn and liquid Sn under ultrasonic irradiation were investigated. An intensive thermal grooving process occurred at AgSn grain boundaries due to ultrasonic effects. Without ultrasonic application, planar shape of AgSn layer gradually evolved into scalloped morphology after the solid-state Sn melting, due to a preferential dissolution of the intermetallic compounds from the regions at grain boundaries, which left behind the grooves embedding in the AgSn layer. Under the effect of ultrasonic, stable grooves could be rapidly generated within an extremely short time (<10s) that was far less than the traditional soldering process (>10min). In addition, the deepened grooves leaded to the formation of necks at the roots of AgSn grains, and further resulted in the strong detachment of intermetallic grains from the substrate. The intensive thermal grooving could promote the growth of AgSn grains in the vertical direction but restrain their coarsening in the horizontal direction, consequently, an elongated morphology was presented. All these phenomena could be attributed to the acoustic cavitation and streaming effects of ultrasonic vibration.

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Improving acoustic streaming effects in fluidic systems by matching SU-8 and polydimethylsiloxane layers

Cited by 3 publications

References 35 publications

Modelling and numerical simulation of magnetostrictive materials for reduction of friction

Modelling and numerical simulation of magnetostrictive materials for reduction of friction

Microstructure and Mechanical Properties of Ultrasound-Assisted Soldered Al-50 wt.%Si/Al-27 wt.%Si Joints for Automotive Applications

Interactions at the planar Ag3Sn/liquid Sn interface under ultrasonic irradiation

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