This paper presents the development of an Intelligent Mini Robot Fingers by using the Shape Memory Alloy (SMA). Taking into consideration the advantages of the SMA, a prototype of mini robot fingers is developed which will be actuated by the SMA. The mini robot fingers has 4 fingers with 3 degrees of freedom (DOF) in each finger. Hence, 12 DOFs of robot fingers are developed to allow a greater ...

This paper presents a low-profile bidirectional folding actuator based on annealed shape memory alloy sheets applicable for mesoand microscale systems. Despite the advantages of shape memory alloys—high strain, silent operation, and mechanical simplicity—their application is often limited to unidirectional operation. We present a bidirectional folding actuator that produces two opposing 180 mot...

Shape Memory Alloys (SMAs) are smart materials that can remember predefined shapes. A deformed SMA can transition to a trained shape by applying temperature changes to portions of the material. This reconfigurable property allows SMAs to be used in aeronautics, medicine, and other fields where dynamic re-engineering or actuation of components is required. In this work, we plan the motion of an ...

The thermomechanical properties of shape memory effect and superelasticity due to the martensitic transformation and the R-phase transformation of TiNi shape memory alloy were investigated experimentally. The transformation line, recovery stress and fatigue property due to both transformations were discussed for cyclic deformation. The thermomechanical properties due to the R-phase transformati...

We report on the first case in Ireland of ureteric stenting with shape-memory alloy nickel-titanium (Memokath 051) stent in relieving malignant ureteric obstruction. Successful drainage was achieved and the patient required no further intervention indicating a clear place for these stents in the long-term management of malignant ureteric strictures. The use of ureteric double-J stenting in the ...

We have demonstrated the utility of nanoindentation as a rapid characterization tool for mapping shape memory alloy compositions in combinatorial thin-film libraries. Nanoindentation was performed on Ni–Mn–Al ternary composition spreads. The indentation hardness and the reduced elastic modulus were mapped across a large fraction of the ternary phase diagram. The large shape memory alloy composi...

Effects of a new shape-memory alloy interspinous process device on pressure distribution of the intervertebral disc and zygapophyseal joints in vitroos4_63 38..45 *Qing-qiang Yao MD, *Sheng-nai Zheng MD, Li Cheng MD, Peng Yuan MD, Dong-sheng Zhang MD, Xiang-wen Liao MD, Yan Xu MD, Li-ming Wang MD Department of Orthopaedic Surgery, Nanjing First Hospital Affiliated to Nanjing Medical University,...

Shape memory alloy (SMA) based actuators have a number of attributes which make them useful for robotic applications. Unfortunately their response is relatively slow, being limited by the speed with which the SMA can be heated and cooled. This paper describes two novel developments of the basic SMA actuator which improve dynamic performance. To allow rapid heating of the shape memory alloy wire...