Mechanical behavior of NiTi shape memory alloy fiber reinforced Sn matrix “smart” composites

2009 ◽  
Vol 44 (3) ◽  
pp. 700-707 ◽  
Author(s):  
J. P. Coughlin ◽  
J. J. Williams ◽  
N. Chawla
Keyword(s):  
Shape Memory Alloy ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Niti Shape Memory Alloy ◽  
Fiber Reinforced ◽  
Smart Composites

An Experimental Study on Mechanical Behavior of Superelastic NiTi Shape Memory Alloy Bar Subjected to Torsion

2010 ◽  
Vol 163-167 ◽  
pp. 3992-3995
Author(s):  
Hai Jun Zhou ◽  
Hong Hong Huang ◽  
Hua Zhang
Keyword(s):  
Experimental Study ◽  
Shape Memory Alloy ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Unit Weight ◽  
Niti Shape Memory Alloy ◽  
Equivalent Damping ◽  
Test Parameters ◽  
Secant Stiffness ◽  
Number Of Cycles

An experimental study on mechanical behavior of superelastic NiTi shape memory alloy (SMA) bar subjected to torsion was made. The SMA specimen was in round bar shape, material phase was austenite and stress mode was torsion. The test was carried out by applying repeated cyclic uniform torsional load. Strain rate, strain amplitude and number of cycles were considered as test parameters. The test was described and analyzed in terms of three fundamental mechanical quantities: secant stiffness, energy loss per unit weight and equivalent damping. The test results show that SMA bar subjected to torsion, have great potential for application in seismic devices due to their considerable superelasticity and stable cyclic behaviors.

Mechanical Behavior of Super-Elastic Home-Made NiTi Shape Memory Alloy Bar in Tension

2013 ◽  
Vol 671-674 ◽  
pp. 1817-1820 ◽  
Author(s):  
Hai Jun Zhou ◽  
Hai Feng Liu ◽  
Hong Hong Huang
Keyword(s):  
Shape Memory Alloy ◽  
Mechanical Behavior ◽  
Shape Memory ◽  
Experimental Tests ◽  
Niti Shape Memory Alloy ◽  
Characteristic Parameters ◽  
Equivalent Damping ◽  
Application Potential ◽  
Transformation Stress ◽  
Strain Energy Loss

An experimental study on mechanical behavior of home-made super-elastic NiTi Shape Memory Alloy (SMA) bar subjected to tension was made. The SMA bar specimen was 8mm in gage diameter and 50mm in gage length. The experimental tests were carried out by applying repeated cyclic loads. The tested tension strain amplitudes were 1%-7% and material phase was austenite. The mechanical characteristic parameters, such as phase transformation stress, deformation module, residual strain, energy loss and equivalent damping were studied. The effects of strain amplitude, loading rate and loading cycles on these parameters were analyzed. The considerable super-elasticity and stable cyclic behaviors of home-made SMA bar during the test showed its great application potential in aseismic devices.

Development of Fe-Mn-Si-Cr Shape Memory Alloy Fiber Reinforced Plaster-Based Smart Composites

2005 ◽  
Vol 475-479 ◽  
pp. 2063-2066 ◽  
Author(s):  
Teppei Wakatsuki ◽  
Yoshimi Watanabe ◽  
Hiroshi Okada
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Shape Memory Effect ◽  
Memory Effect ◽  
Tensile Strain ◽  
Bending Test ◽  
Fiber Reinforced ◽  
Three Point Bending ◽  
Smart Composites ◽  
Fiber Holder

In previous studies, it has been found that the shape memory effect of the embedded straight and wavy shape memory alloy (SMA) fibers enhance the strength and energy absorption prior to fracture of the composite, where the embedded SMA fibers shrink due to their shape memory effect. In the case of wavy fiber reinforced composites, the SMA fibers were subjected to pre-tensile strain using fiber holder with rotatable rollers to maintain the constant periodicity and amplitude of wavy fibers. In this study, on the other hand, the wavy SMA fibers were subjected to pre-tensile strain without using fiber holder, and therefore, periodicity and amplitude of wavy fibers were varied during the deformation. Then the wavy SMA fiber reinforced smart composite is fabricated. For the mechanical property characterization, three-point bending test is performed for the specimens.

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