On the cyclic stability of the thermomechanical behavior of NiTi shape memory cylindrical actuators

Owusu-Danquah, J.S.; Saleeb, A. F.

doi:10.1016/j.euromechsol.2017.02.005

Cited by 12 publications

(6 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The fundamental equations underlining the utilized material model are briefly stated in table 1 (other details can be found in Saleeb et al [37,[53][54][55][56]). The current section of the paper…”

Section: Summary Description Of Sma Constitutive Modelmentioning

confidence: 99%

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Güllü

Danquah

Dilibal

2021

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

Earthquake-resistant design of structures requires dissipating seismic energy by deformations of structural members or additional fuse elements. Owing to its easy-to-produce, plug-and-play, high equivalent damping ratio, and large displacement capacity characteristics, energy dissipative steel cushions (SCs) were found to be an efficient candidate for this purpose. However, similar to other conventional metallic dampers, residual displacement after a strong shaking is the most notable drawback of the SCs. In this work, cushions produced from Ni–Ti shape memory alloy (SMA) are evaluated numerically by experimentally verified finite element models to assess their impact on the performance of earthquake-resistant structures. Furthermore, a reinforced concrete testing frame is retrofitted with energy dissipative steel and Ni–Ti cushions. Performance of the frames (e.g. dissipated energy by the cushions, hysteretic energy to input energy ratio, maximum drift, and residual drift) with different types of cushions are evaluated by nonlinear response history analyses. The numerical results showed that the SCs are effective to reduce peak responses, while Ni–Ti cushions are more favorable to reduce residual drifts and deformations. Hence, a hybrid system, employing the steel and SMA cushions together, is proposed to reach optimal seismic performance.

show abstract

Section: Summary Description Of Sma Constitutive Modelmentioning

confidence: 99%

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Güllü

Danquah

Dilibal

2021

Smart Mater. Struct.

Self Cite

View full text Add to dashboard Cite

show abstract

“…п.). В зарубежной литературе в последнее время встречается не так много работ по функциональной усталости [2][3][4][5][6][7]. В основном авторы применяют методы анализа классической усталости, принятые для конструкционных материалов и примененные для сплавов с ЭПФ [8][9][10][11][12][13][14][15].…”

Section: Introductionunclassified

“…Так, например, испытательные машины на разрыв или на усталость неэкономичны, требуют для работы в широком температурном диапазоне больших затрат хладагента, крупных образцов и т. п. Более того, в ряде работ к функциональной усталости относят характеристики усталостной прочности. Авторы [6,7] подробно исследовали и смоделировали функциональную усталость материала с ЭПФ в том смысле, в котором она представлена в настоящей работе. Однако в этих работах материал подвергается деформации кручения, а кручение, как известно, само по себе является сложным напряженным состоянием и редко встречается в известных устройствах с исполнительными элементами из сплавов с ЭПФ [1,[16][17][18][19][20][21][22][23][24][25][26][27][28][29].…”

Section: Introductionunclassified

Функциональная усталость сплавов с эффектом памяти формы систем Ni-Mn-Ga и Ni-Ti в условиях термоциклирования под постоянной нагрузкой

Kalashnikov¹,

Musabirov²,

Koledov³

et al. 2020

Журнал Технической Физики

View full text Add to dashboard Cite

A comparative study of the functional properties and functional fatigue of Ni-Mn-Ga alloys in the initial cast state and Ni-Ti alloys in the initial hot-forged state without heat treatment was carried out. Measurements were carried out using experimental technique of three-point bending of samples in the form of plates of ~ 0.7 mm x 10 mm x 1.5 mm. It is shown that Ni2MnGa alloy in the cast state is preferably used for lightly loaded actuators (up to 100 MPa) and reversible deformations (up to 1.5%) in the temperature range from -85 C to -75 C; Ni-Ti system alloy in hot-forged state is recommended for highly loaded actuators (up to 500 MPa) , high reversible deformations (up to 8.5%) in the temperature range from -40 C to 40 C.

show abstract

“…[7][8][9]. However, there are still some problems unsolved due to its poor fatigue life and large hysteresis [10,11].…”

Section: Introductionmentioning

confidence: 99%

Effects of Grain Size Gradient on Deformation Behavior of Superelastic NiTi Plate

Yin¹,

Qi²

2019

dtcse

View full text Add to dashboard Cite

The superelastic NiTi shape memory alloy with grain size distributed from 20 nm to 175 nm along the gauge length is fabricated by cold rolling and gradient heat treatment. This study investigated the effects of grain size gradient on deformation behavior of the NiTi plate under strain controlled quasi-static loading-unloading. Experimental results show that when the grain size decreased from 175 nm to 35 nm, the phase transformation stress increased from 380 MPa to 509 MPa, and the stress slope increased from 0.6GPa to 14.15GPa. With a simple phenomenological model, we have simulated the stress-strain responses and demonstrated the mechanism of the deformation behaviors of the grain size gradient superelastic NiTi plate. The study indicates that the particular behavior of the plate is due to grain size effects of coexisting grain size gradient.

show abstract

On the cyclic stability of the thermomechanical behavior of NiTi shape memory cylindrical actuators

Cited by 12 publications

References 34 publications

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Characterization of energy dissipative cushions made of Ni–Ti shape memory alloy

Функциональная усталость сплавов с эффектом памяти формы систем Ni-Mn-Ga и Ni-Ti в условиях термоциклирования под постоянной нагрузкой

Effects of Grain Size Gradient on Deformation Behavior of Superelastic NiTi Plate

Contact Info

Product

Resources

About