scholarly journals Fatigue measurement of a shape memory Ti-Ni-Cu wire used as artificial heart muscle

2005 ◽  
Vol 17 (1/2) ◽  
pp. 38-41
Author(s):  
R. IBUKI ◽  
G. GUENIN ◽  
M. MORIN ◽  
S. MARUYAMA
Keyword(s):  
Shape Memory ◽  
Heart Muscle ◽  
Artificial Heart ◽  
Fatigue Measurement

scholarly journals Finite Element Studies of Triple Actuation of Shape Memory Alloy Wires for Surgical Tools

2018 ◽  
Author(s):  
Bardia Konh
Keyword(s):  
Shape Memory ◽  
Artificial Heart ◽  
Heart Valves ◽  
Engineering Systems ◽  
Design And Development ◽  
Orthodontic Wires ◽  
Recoverable Strain ◽  
Artificial Heart Valves ◽  
Innovative Products ◽  
Superelastic Behavior

Since the early discovery in 1951 [1], shape memory alloys (SMAs) have been used in design and development of several innovative engineering systems. SMAs’ unique characteristics have introduced unconventional alternatives in design and development of advanced devices. SMA’s field of applications has covered many areas from aerospace to auto industries, and medical devices [2]. During the past couple of decades, scientists have suggested material models to predict the SMA’s shape memory effect (SME) and its superelastic behavior. The superelastic characteristic of SMAs (its capability to exhibit a large recoverable strain) has been widely used to develop innovative products including biomedical implants such as stents, artificial heart valves, orthodontic wires, frames of indestructible spectacles, etc. However, its actuation capabilities, known as SME, hasn’t been thoroughly expanded. The number of products privileging from SMA’s SME behavior has been very limited. The reason relies on the SMA’s complex material properties that depend on the stress, strain and temperature at every stage of actuation as well as the material’s processing and the thermomechanical loading history.

Design of Plate-type Actuator using SMA Wire for Assistant Artificial Heart Muscle

2007 ◽  
Vol 19 (3) ◽  
pp. 359-365 ◽  
Author(s):  
Ryuta Ibuki ◽  
Shigenao Maruyama ◽  
Atsuki Komiya ◽  
Tomoyuki Yambe
Keyword(s):  
Heart Muscle ◽  
Artificial Heart ◽  
Plate Type

scholarly journals Electrical Stimulation of Artificial Heart Muscle

ASAIO Journal ◽  
2017 ◽  
Vol 63 (3) ◽  
pp. 333-341 ◽  
Author(s):  
Mohamed A. Mohamed ◽  
Jose F. Islas ◽  
Robert J. Schwartz ◽  
Ravi K. Birla
Keyword(s):  
Electrical Stimulation ◽  
Heart Muscle ◽  
Artificial Heart ◽  
Stimulation Of

Development of Thermoelectric Actuators Applied to Artificial Heart Muscle

2002 ◽  
Author(s):  
Shigenao Maruyama ◽  
Ryuta Ibuki ◽  
Seigo Sakai ◽  
Tomoyuki Yambe ◽  
Toshiyuki Takagi ◽  
...  
Keyword(s):  
Heart Muscle ◽  
Artificial Heart

Estimation of Heat Emission on Artificial Heart Muscle Using Thermoelectric Actuator

2003 ◽  
Vol 2003.7 (0) ◽  
pp. 61-62
Author(s):  
Ryuta Ibuki ◽  
Shigenao Maruyama ◽  
Seigo Sakai ◽  
Behnia Masud
Keyword(s):  
Heart Muscle ◽  
Artificial Heart ◽  
Heat Emission

scholarly journals Engineering 3D Bio-Artificial Heart Muscle

ASAIO Journal ◽  
2015 ◽  
Vol 61 (1) ◽  
pp. 61-70 ◽  
Author(s):  
Nikita M. Patel ◽  
Ze-Wei Tao ◽  
Mohamed A. Mohamed ◽  
Matt K. Hogan ◽  
Laura Gutierrez ◽  
...  
Keyword(s):  
Heart Muscle ◽  
Artificial Heart

Establishing the Framework to Support Bioartificial Heart Fabrication Using Fibrin-Based Three-Dimensional Artificial Heart Muscle

2014 ◽  
Vol 39 (2) ◽  
pp. 165-171 ◽  
Author(s):  
Matthew Hogan ◽  
Mohamed Mohamed ◽  
Ze-Wei Tao ◽  
Laura Gutierrez ◽  
Ravi Birla
Keyword(s):  
Heart Muscle ◽  
Artificial Heart ◽  
Three Dimensional

scholarly journals Noninvasive Measurement of EKG Properties of 3D Artificial Heart Muscle

2017 ◽  
Vol 1 (1) ◽  
pp. 12-30 ◽  
Author(s):  
Betsy H. Salazar ◽  
◽  
Kristopher A. Hoffman ◽  
Anilkumar K. Reddy ◽  
Sridhar Madala ◽  
...  
Keyword(s):  
Heart Muscle ◽  
Artificial Heart ◽  
Noninvasive Measurement

Tensile Failure of 55-Nitinol Wire

1975 ◽  
Vol 33 ◽  
pp. 46-47
Author(s):  
F. I. Grace
Keyword(s):  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Stoichiometric Composition ◽  
Tensile Failure ◽  
Initial State ◽  
Initial Shape ◽  
Nitinol Wire ◽  
Cscl Type ◽  
Shear Transformation

An interest in NiTi alloys with near stoichiometric composition (55 NiTi) has intensified since they were found to exhibit a unique mechanical shape memory effect at the Naval Ordnance Laboratory some twelve years ago (thus refered to as NITINOL alloys). Since then, the microstructural mechanisms associated with the shape memory effect have been investigated and several interesting engineering applications have appeared.The shape memory effect implies that the alloy deformed from an initial shape will spontaneously return to that initial state upon heating. This behavior is reported to be related to a diffusionless shear transformation which takes place between similar but slightly different CsCl type structures.

TEM study of order, structure and defects of β and martensite in Cu-Al-Mn shape memory alloys

1990 ◽  
Vol 48 (4) ◽  
pp. 188-189
Author(s):  
J.M. Guilemany ◽  
F. Peregrin
Keyword(s):  
Shape Memory ◽  
Orthophosphoric Acid ◽  
Isopropyl Alcohol ◽  
Metastable Phase ◽  
Characteristic Temperature ◽  
Ethanol Solution ◽  
Order Structure ◽  
Thin Foils ◽  
Polycrystalline Alloys ◽  
Diamond Saw

The shape memory effect (SME) shown by Cu-Al-Mn alloys stems from the thermoelastic martensitic transformation occuring between a β (L2,) metastable phase and a martensitic phase. The TEM study of both phases in single and polycrystalline Cu-Al-Mn alloys give us greater knowledge of the structure, order and defects.The alloys were obtained by vacuum melting of Cu, Al and Mn and single crystals were obtained from polycrystalline alloys using a modified Bridgman method. Four different alloys were used with (e/a) ranging from 1.41 to 1.46 . Two different heat treatments were used and the alloys also underwent thermal cycling throughout their characteristic temperature range -Ms, Mf, As, Af-. The specimens were cut using a low speed diamond saw and discs were mechanically thinned to 100 μm and then ion milled to perforation at 4 kV. Some thin foils were also prepared by twin-jet electropolishing, using a (1:10:50:50) urea: isopropyl alcohol: orthophosphoric acid: ethanol solution at 20°C. The foils were examinated on a TEM operated at 200 kV.

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