Numerical and Experimental Study of the Fatigue Behavior for a Medical Rehabilitation Exoskeleton Device Using the Resonance Method

Mitu, Ana-Maria; Sireteanu, Tudor; Pop, Nicolae; Chiș, Liviu Cristian; Maxim, Vicentiu Marius; Apsan, Mirela Roxana

doi:10.3390/ma16031316

Cited by 2 publications

(1 citation statement)

References 24 publications

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“…[53] to obtain the bending fatigue properties of Polycarbonate and in ref. [54] to characterize the fatigue behavior of a medical rehabilitation exoskeleton device. In this study, the resonant bending fatigue test rig designed by the University of Pisa in collaboration with ACTA Srl is initially presented, including a global overview of all the principal components of the machine, such as the control system, the employed electronic devices, and the strain gauges calibrations.…”

Section: Introductionmentioning

confidence: 99%

Resonant Fatigue Tests on Drill Pipe Connections with Different Geometries and Sizes

Santus

Romanelli

Burchianti³

et al. 2023

Applied Sciences

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In this study, a resonant bending fatigue test rig, designed and implemented by the University of Pisa, is presented, providing a detailed description of the set-up of the machine, the strain gauges calibrations, and the control system used with the main electronic devices. Several geometries of drill pipe connections and pipe samples made of different materials were tested, and all the obtained experimental fatigue results are presented in the paper and compared to previous experimental data. Fractographic images are provided to clearly show that, in two kinds of drill pipe connections, the crack initiation was found at the connection zone, whereas for another connection geometry, it was found at the pipe body. In order to interpret these latter results, a discussion about the section modulus of bending of the various sections of the drill pipes was provided, along with an FE model of a specific zone of one of these connections.

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Section: Introductionmentioning

confidence: 99%

Resonant Fatigue Tests on Drill Pipe Connections with Different Geometries and Sizes

Santus

Romanelli

Burchianti³

et al. 2023

Applied Sciences

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On uniqueness and dilatational waves in a porous Cosserat thermoelastic body

Marin,

Vlase,

Neagu

et al. 2024

J. Umm Al-Qura Univ. Eng.Archit.

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In this paper first we formulate the mixed problem with initial and boundary values in the context of the porous Cosserat thermoelastic bodies micropolar material with voids. WE have included among the independent constitutive variables the derivative with respect to time of the voids (pores) function. Under the conditions in which we imposed average restrictions on the functions used, we formulated and demonstrated the uniqueness of the solution to the mentioned mixed problem and we did a short analysis on the dilatational waves in this kind of media.

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Numerical and Experimental Study of the Fatigue Behavior for a Medical Rehabilitation Exoskeleton Device Using the Resonance Method

Abstract: In this paper, the dynamic behavior of a hip level joint device of an active exoskeleton used in the medical field is analyzed. The finite element method is used in order to determine the first frequencies and the eigenmodes, necessary for the fatigue testing in the resonance regime.

Cited by 2 publications

References 24 publications

Resonant Fatigue Tests on Drill Pipe Connections with Different Geometries and Sizes

Resonant Fatigue Tests on Drill Pipe Connections with Different Geometries and Sizes

On uniqueness and dilatational waves in a porous Cosserat thermoelastic body

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