An experimental investigation of shape memory alloy springs for passive vibration isolation

Mayes, John J.; Lagoudas, Dimitris C.; Henderson, Benjamin K.; Afb, Kirtland

doi:10.2514/6.2001-4569

Cited by 20 publications

(14 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The experimental results presented in Mayes and Lagoudas (2001) and Mayes (2001) have also shown that the precompression can greatly shift th« resonant frequency of the system. Experimental result; of Cases 1 and 9 and Cases 6 and 10 show the effect ol varying precompression on the system behavior Inadequacies in the experimental design preventec absolute certainty as to the amount of precompressior and although every effort was made to ensure thf correct amount of precompression had been appliet to the system, it is evident that even the slightest changi in the precompression will alter the system respons greatly.…”

Section: Comparison Of Simplified Model and Preisach Model Predictionmentioning

confidence: 95%

“…Output acceleration was also measured by a signal analyzer and the ratio of the magnitude of the output to the input accelerations was processed to create a frequency domain transfer function for the system. Details of the experimental setup and various experimental cases have been presented in detail in work done by Mayes and Lagoudas (2001) and Mayes (2001).…”

Section: Description Of Sma Vibration Isolation Experimentsmentioning

confidence: 99%

“…Table 1 shows a tabulation of different experimental cases along with variation of parameters effecting the system behavior. Number of compression springs (tubes), amount of precompression as percentage of tube diameter (as the tubes were loaded in a transverse direction), isolation mass, and amplitude of base excitation were the considered parameters during the dynamical testing of the vibration isolation device (Mayes, 2001;Mayes and Lagoudas, 2001).…”

Section: Comparison Of Simplified Model and Preisach Model Predictionmentioning

confidence: 99%

See 2 more Smart Citations

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part II – Simulations and Experimental Correlations

Lagoudas

Khan

Mayes³

et al. 2004

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

.Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources gathering and maintainina the data needed, »rid completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducina including suggestions for reducing valid oKSffi^^M.^ this burden to Department of Defense, Washington Headquarters Services, Directorate for Information 14. ABSTRACT In Part D of this two-part study, system simulations and experimental correlations of a Shape Memory Alloy (SMA) based vibration isolation device (briefly described in Part I) has been presented, this device consists of layers of preconstrained SMA tubes undergoing pseudoelastic transformations under transverse dynamical loading. In Part n, detailed description of the prototype vibration isolation device, its experimental setup, and actual experimental test results are presented. An extensive parametric study has been conducted on a nonlinear hysteretic dynamical system, representing this vibration isolation device utilizing a physically based simplified SMA model and a Preisach model (an empirical model based on system identification) developed in Part I. Both the physically based simplified SMA model and the modified Preisach model have been utilized to perform experimental correlations with the results obtained from actual testing of the device. Based on the investigations, it has been shown that variable damping and tunable isolation response are major benefits of SMA pseudoelasticity Correlation of numerical simulations and experimental results has shown that large amplitude displacements causing phase transformations of SMA components present in such a device are necessary for effective reduction in the transmissibility of such dynamical systems. It has also been shown that SMA-based devices can overcome performance trade-offs inherent in typical softening spring-damper vibration isolation systems. In terms of numerically predicting the experimental results, it has been shown that the Preisach model gave relatively accurate results due to better modeling of the actual SMA tube behavior. However for a generic parametric study, the physically based simplified SMA model has been found to be more useful as it is motivated from the constitutive response of SMAs and hence, could easily incorporate different changes in system conditions. SUBJECT TERMSShape memory alloys (SMAs), pseudoelasticity, hysteresis, Preisach, system identification, passive vibration isolation, damping, dynamic system shown that the Preisach model gave relatively accurate results due to better modeling of the actual SMA tube behavior. However, for a generic parametric study, the physically based simplified SMA model has been found to be more useful as it is motivated from the constitutive response of SMAs and hence, could easily incorporate different changes i...

show abstract

Section: Comparison Of Simplified Model and Preisach Model Predictionmentioning

confidence: 95%

Section: Description Of Sma Vibration Isolation Experimentsmentioning

confidence: 99%

Section: Comparison Of Simplified Model and Preisach Model Predictionmentioning

confidence: 99%

See 1 more Smart Citation

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part II – Simulations and Experimental Correlations

Lagoudas

Khan

Mayes³

et al. 2004

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

show abstract

“…The typical stress-strain response of the SMA loaded in the austenite phase exhibits hysteretic loop that has a flag-like shape, and brings the effects of energy dissipation and damping while still keeping its original shape. Many researchers have studied such phenomena for applications in civil structures such as dampers, base isolation devices, restrainers, and reinforcement for concrete [1,2,6,10,12,13,19,20,24,27 among many others].…”

Section: Background On Shape Memory Alloysmentioning

confidence: 99%

Sustainability of civil infrastructure using shape memory technology

Jung

Zafar²,

Andrawes

2017

Innov. Infrastruct. Solut.

View full text Add to dashboard Cite

The last few decades have clearly demonstrated the vulnerability of our civil infrastructure systems to problems like aging, natural, and man-made hazards including earthquakes, hurricanes, blasts, etc. The conventional materials such as steel and concrete have proven to be limited in terms of their ability to withstand the extreme demands imposed on them by modern societies. The limitations in currently used construction materials combined with the consistently growing population worldwide present new challenges and demands for researchers in the field of structural engineering. Hence, there is an urgent need for new materials that are capable of extending the service life of structures with minimal or no need for maintenance or repairs against natural and manmade hazards. Shape memory alloy (SMA) is a class of ''Smart Materials'' that have recently emerged as potential construction material with unique thermomechanical properties, namely shape memory effect and superelasticity. Two applications of SMAs in civil structures are discussed in this paper. The first application involves the use of SMA in performing seismic rehabilitation of RC bridge columns that lack flexural ductility. In this application, SMA is used in the form of thermally prestressed spirals that can apply large active confinement pressure to the columns at their plastic hinge regions to improve their flexural ductility. The experimental results of large scale shake table tests performed on two RC columns, one of which is retrofitted with SMA are discussed. The results demonstrate the great ability of SMA spirals in mitigating the damage even under strong levels of ground shaking. The second application focuses on utilizing superelastic SMA fibers as reinforcement for polymeric composite bars. The newly developed composite material is named SMAFiber Reinforced Polymer (SMA-FRP), and is studied as seismic reinforcing bars for moment resisting concrete frames. The results of nonlinear time history analysis prove that using SMA-FRP bars at the plastic hinge regions of the frames helps significantly in limiting the residual drifts and enhancing the energy dissipation of the frames.

show abstract

“…This work is motivated by the need to model and'experimentally validate a prototype of a SMA-based isolation system (Mayes and Lagoudas, 2001) and is a continuation of earlier works (Lagoudas et al, 2001a;Khan and Lagoudas, 2002;Lagoudas et al, 2002) presented by the authors in recent conferences. The vibration isolation device presented in this work consists of layers of preconstrained SMA tubes undergoing pseudoelastic transformations under transverse dynamic loading.…”

Section: V)mentioning

confidence: 99%

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part I – Modeling

Khan

Lagoudas

Mayes³

et al. 2004

Journal of Intelligent Material Systems and Structures

View full text Add to dashboard Cite

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instructions, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing this collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden to Department of Defense, Washington Headquarters Services, Directorate for Information , 1215 Jefferson Davis Highway, Suite 1204, Arlington, VA 22202-4302 Respondents should be aware that notwithstanding any other provision of law, no person shall be subject to any penalty for failing to comply with a collection of information if it does not display a currently valid OMB control number PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS.' . REPORT DATE (DD-MM-YYYY) I SPONSOR/MONITOR'S REPORT NUMBER(S) DISTRIBUTION / AVAILABILITY STATEMENTApproved for public release; distribution is unlimited. 028.v_ , Vol. 15-June 2004, pp. 415-441. 14. ABSTRACT In this work, the effect of pseudoelastic response of shape memory alloys (SMAs) on passive vibration isolation has been investigated. This study has been conducted by developing, modeling, and experimentally validating a SMA-based vibration isolation device. This device consists of layers of preconstrained SMA tubes undergoing pseudoelastic transformations under transverse dynamic loading. These SMA tubes are referred to as SMA spring elements in this study. To accurately model the nonlinear hysteretic response of SMA tubes present in this device, at first a Preisach model (an empirical model based on system identification) has been adapted to represent the structural response of a single SMA tube. The modified Preisach model has then been utilized to model the SMA-based vibration isolation device. Since this device also represents a nonlinear hysteretic dynamical system, a physically based simplified SMA model suitable for performing extensive parametric studies on such dynamical systems has also been developed. Both the simplified SMA model and the Preisach model have been used to perform experimental correlations with the results obtained from actual testing of the device. Based on the studies conducted, it has been shown that SMA-based vibration isolation devices can overcome performance trade-offs inherent in typical softening spring-damper vibration isolation systems. This work is presented as a two-part paper. Part I of this study presents the modification of the Preisach model for representing SMA pseudoelastic tube response together with the implemented identification methodology. Part I also presents the development of a physically based simplified SMA model followed by model comparisons with the actual tube response. Part II covers extensive parametric study of a pseudoelastic SMA spring-mass system using both models developed in Part I. Part II also presents numerical simulations of a dynamic system based on the prototype dev...

show abstract

An experimental investigation of shape memory alloy springs for passive vibration isolation

Cited by 20 publications

References 8 publications

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part II – Simulations and Experimental Correlations

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part II – Simulations and Experimental Correlations

Sustainability of civil infrastructure using shape memory technology

Pseudoelastic SMA Spring Elements for Passive Vibration Isolation: Part I – Modeling

Contact Info

Product

Resources

About