scholarly journals Influence of Cyclic Loading on Inhomogeneous Deformation Behavior Arising in NiTi Shape Memory Alloy Plate

2005 ◽  
Vol 69 (8) ◽  
pp. 596-603
Author(s):  
Go Murasawa ◽  
Satoru Yoneyama ◽  
Toshio Sakuma ◽  
Masahisa Takashi
Keyword(s):  
Cyclic Loading ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Niti Shape Memory Alloy ◽  
Inhomogeneous Deformation ◽  
Alloy Plate

Deformation Behavior of Shape-Control Plate Using NiTi Shape Memory Alloy Wire

2007 ◽  
Vol 340-341 ◽  
pp. 1205-1210
Author(s):  
Keiichiro Tohgo ◽  
Yuki Tochigi ◽  
Hiroyasu Araki ◽  
Yoshinobu Shimamura
Keyword(s):  
Aluminum Alloy ◽  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Shape Control ◽  
Niti Shape Memory Alloy ◽  
Alloy Plate ◽  
Bending Deformation ◽  
Control Plate ◽  
Aluminum Alloy Plate

This study deals with deformation behavior of a shape-control plate which consists of an aluminum alloy plate and a pre-strained NiTi shape memory alloy (SMA) wire. The shape-control plate exhibits reciprocating bending deformation by heating and cooling. Deformation behavior of the plate is examined by electric heating and natural cooling of the SMA wire. Experimental results exhibit that the bending deformation of the plate is considerably stable over more than two thousand heating-cooling cycles and can be well controlled by electric current. Furthermore, the deformation behavior of the plate is analyzed by a simple beam theory for the aluminum alloy plate and Brinson’s one-dimensional constitutive model for the SMA wire taking account of not only martensitic transformation but also rhombohedral-phase transformation. Numerical results describe well the deformation behavior of the shape-control plate observed in the experiments.

Complex transformation field created by geometrical gradient design of NiTi shape memory alloy

2017 ◽  
Vol 10 (01) ◽  
pp. 1740011 ◽  
Author(s):  
Reza Bakhtiari ◽  
Bashir S. Shariat ◽  
Fakhrodin Motazedian ◽  
Zhigang Wu ◽  
Junsong Zhang ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Stress Gradient ◽  
Tensile Loading ◽  
Niti Shape Memory Alloy ◽  
Mechanical Behaviors ◽  
Modeling Framework ◽  
Complex Transformation ◽  
Pseudoelastic Behavior

Owing to geometrical non-uniformity, geometrically graded shape memory alloy (SMA) structures by design have the ability to exhibit different and novel thermal and mechanical behaviors compared to geometrically uniform conventional SMAs. This paper reports a study of the pseudoelastic behavior of geometrically graded NiTi plates. This geometrical gradient creates partial stress gradient over stress-induced martensitic transformation, providing enlarged stress controlling interval for shape memory actuation. Finite element modeling framework has been established to predict the deformation behavior of such structures in tensile loading cycles, which was validated by experiments. The modeling results show that the transformation mostly propagates along the gradient direction as the loading level increases.

scholarly journals Experimental Impression Tray Fabricated with a NiTi Shape Memory Alloy Plate.

1999 ◽  
Vol 18 (4) ◽  
pp. 462-466
Author(s):  
Susumu HIRANO ◽  
Masaaki OZAWA ◽  
Iwao IKEJIMA ◽  
Manabu KOMORIYAMA ◽  
Atsushi KOHNO ◽  
...  
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Niti Shape Memory Alloy ◽  
Alloy Plate

scholarly journals Measurement of Inhomogeneous Deformation Behavior Arising in Shape Memory Alloy

2004 ◽  
Vol 53 (9) ◽  
pp. 999-1005 ◽  
Author(s):  
Go MURASAWA ◽  
Makoto KOUSHINBOU ◽  
Satoru YONEYAMA ◽  
Toshio SAKUMA ◽  
Masahisa TAKASHI
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Deformation Behavior ◽  
Inhomogeneous Deformation
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