Investigation of the Damping Performance of a Shape Memory Alloy Beam

Danesh, Nasim; Mahmoodabadi, Mohammad Javad; Fathi, Alireza

doi:10.5829/ije.2023.36.07a.17

Cited by 4 publications

(1 citation statement)

References 67 publications

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“…The main parameters of the strain energy approach include energy density dissipated instantaneously (W), capacity energy (Wliq) and strain energy ratio (W/Wliq) (14,18). It should be noted that in addition to soil and porous media, the approach is effectively applied to investigate the cyclic behavior of structural elements (e.g., steel plates (42); reinforced concrete (43); alloy beams (44)) under earthquake conditions. The achievement of a pore pressure ratio (ru) of 1 is assumed an appropriate criterion for liquefaction occurrence.…”

Section: Cyclic Test Resultsmentioning

confidence: 99%

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

Abdollahi,

Bolouri Bazaz,

Akhtarpour

2024

IJE

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Mining Exploration, excavation, and construction are considered as mining activities which are recently growing dramatically. Therefore, utilizing the mining wastes with the least environmental damage is a significant concern. Tailings dams are one of the conventional solutions that store the extracted hazardous substances safely for water resources management and environmental protection. This reseach deals with the effects of monotonic and seismic loadings on silt-sized copper wastes existed in a tailings dam at Northwest Iran as a case study. Various values of initial static shear stress are performed using an automated cyclic triaxial system. Monotonic undrained compressive tests were performed with a relatively constant density and considering three values of 50, 100, and 150 kPa for mean effective stress. Depending on the first density of samples, applying a mean effective confining pressure of 100 kPa, increased the initial densities by 25 to 30% as compared to the initial condition.Moreover, the effect of initial shear stress ratio with three values of 0, 0.2, and 0.4 was evaluated. No peak point was observed for samples under α = 0, whereas, samples with α = 0.4 encountered a peak point before reaching to the phase transformation point. The results of cyclic experiments were used to evaluate capacity energy and residual pore pressure based on the strain energy approach. Cyclic tests on the samples were performed considering the shear amplitude of 0.75% and frequency of 0.3 Hz. It is shown that the most energy dissipation occurs at the first cycle possessing the highest stiffness. For α = 0, energy density increased from 474 J/m 3 to 1147.4 J/m 3 ; however, a more intense increase was measured from 682 J/m 3 to 5839 J/m 3 when α = 0.4. It is also found that applying initial shear stress has a pretty considerable influence on monotonic strength and the liquefaction resistance of silts. The increase of α from 0 to 0.4 yielded a linear increase in the shear strength of samples in the range of 20 kPa to 70 kPa. The results of this paper were then validated accurately through some previous studies.

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Section: Cyclic Test Resultsmentioning

confidence: 99%

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

Abdollahi,

Bolouri Bazaz,

Akhtarpour

2024

IJE

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Analytical investigation of the combined influence of magnetostriction and bandwidth on parametric noise-induced chaos in shape memory alloy micro-electromechanical cantilevers

Asnafi

2024

Mechanics Based Design of Structures and Machines

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Fully analytic approach to study bifurcation phenomenon for a shape memory alloy beam under temperature variation and lateral white-noise excitation

Asnafi

2024

Journal of Vibration and Control

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The main aim of this article is to obtain the probability density function of the response of an SMA beam under lateral white-noise excitation and study the bifurcation phenomenon through a fully analytic approach. Firstly, an efficient constitutive stress–strain relation for a shape memory alloy material supporting both martensite and austenite phases is considered. Secondly, the governing equation of motion for a typical SMA simply supported beam is derived using some dimensionless parameters. Thirdly, the corresponding probability density function of the response is computed analytically using the powerful Fokker–Planck–Kolmogorov equation, and finally, the bifurcation phenomenon for parameter variations of the beam is investigated. The results show how geometric (beam aspect ratio), force (the mean value of the white-noise excitation), and environmental (working temperature) factors can affect the nonlinear behavior and response bifurcation of the beam. A numerical validation is also done that guarantees the correctness of the method and results.

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Investigation of the Damping Performance of a Shape Memory Alloy Beam

Cited by 4 publications

References 67 publications

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

Cyclic and Monotonic Behavior of Non-plastic Silts with the Presence of Initial Static Shear Stress Using Strain Energy Approach: A Case Study for a Tailings Dam

Analytical investigation of the combined influence of magnetostriction and bandwidth on parametric noise-induced chaos in shape memory alloy micro-electromechanical cantilevers

Fully analytic approach to study bifurcation phenomenon for a shape memory alloy beam under temperature variation and lateral white-noise excitation

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