Determination of the Young's modulus in CuAlBe shape memory alloys with different microstructures by impulse excitation technique

2016 ◽  
Vol 676 ◽  
pp. 121-127 ◽  
Author(s):  
S. Montecinos ◽  
S. Tognana ◽  
W. Salgueiro
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Impulse Excitation

Design of Shape Memory Alloy Springs With Applications in Vibration Control

1993 ◽  
Vol 115 (1) ◽  
pp. 129-135 ◽  
Author(s):  
C. Liang ◽  
C. A. Rogers
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory Alloys ◽  
Shape Memory ◽  
Vibration Control ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Design Method ◽  
Control Area ◽  
Spring Constant ◽  
Damping Capacity

Shape memory alloys (SMAs) have several unique characteristics, including their Young’s modulus-temperature relations, shape memory effects, and damping characteristics. The Young’s modulus of the high-temperature austenite of SMAs is about three to four times as large as that of low-temperature martensite. Therefore, a spring made of shape memory alloy can change its spring constant by a factor of three to four. Since a shape memory alloy spring can vary its spring constant, provide recovery stress (shape memory effect), or be designed with a high damping capacity, it may be useful in adaptive vibration control. Some vibration control concepts utilizing the unique characteristics of SMAs will be presented in this paper. Shape memory alloy springs have been used as actuators in many applications although their use in the vibration control area is very recent. Since shape memory alloys differ from conventional alloy materials in many ways, the traditional design approach for springs is not completely suitable for designing SMA springs. Some design approaches based upon linear theory have been proposed for shape memory alloy springs. A more accurate design method for SMA springs based on a new nonlinear thermomechanical constitutive relation of SMA is also presented in this paper.

scholarly journals Determination of Young’s Modulus by Specific Vibration of Basalt and Diabase

2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Osvail André Quaglio ◽  
José Margarida da Silva ◽  
Edmo da Cunha Rodovalho ◽  
Leandro de Vilhena Costa
Keyword(s):  
Young’S Modulus ◽  
Young's Modulus ◽  
Strain Curve ◽  
Acoustic Response ◽  
Fundamental Factor ◽  
Impulse Excitation ◽  
Definition Of ◽  
Mechanical Impulse ◽  
High Repeatability

The elasticity is an important parameter for the evaluation of the mechanical behavior of a rock mass and a fundamental factor in the definition of the resistance characteristics, stability, and blastability in rock blasts, and it is an important parameter for the blastability equations like the Kuz–Ram method. This paper presents a comparison of the Uniaxial Compression Method (UCM) and the Impulse Excitation Technique (IET) in determining Young’s modulus. The IET is a static and nondestructive dynamic method of characterizing mechanical parameters of materials, while the UCM is a quasistatic and destructive method. We determined Young’s modulus of samples from nine basalt and diabase mines used as aggregates in the construction industry. Young’s modulus was determined by the acoustic response due to longitudinal oscillations caused by a mechanical impulse (IET) in the Sonelastic equipment and the stress-strain curve (UCM). Young’s modulus values showed high repeatability and agreed with those reported in the literature for the same material. The work shows that the solnelastic is an innovate equipment and elucidated advantages of IET in comparison to the UCM such as shorter execution time, greater safety, and a lower cost ranging from 11.5% to 22.5% of the UCM.

On the determination of Young’s modulus of thin films with impulse excitation technique

2016 ◽  
Vol 32 (3) ◽  
pp. 497-511 ◽  
Author(s):  
M.F. Slim ◽  
A. Alhussein ◽  
A. Billard ◽  
F. Sanchette ◽  
M. François
Keyword(s):  
Thin Films ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Impulse Excitation ◽  
Image Position

Abstract

The Effect of Non-Constant Young's Modulus in Modelling of Tension and Compression of Superelastic NI-TI Shape Memory Alloys

2010 ◽  
Vol 26 (4) ◽  
pp. 553-561
Author(s):  
Andrej Puksic ◽  
Janez Kunavar ◽  
Miha Brojan ◽  
Franc Kosel
Keyword(s):  
Shape Memory Alloys ◽  
Shape Memory ◽  
Young’S Modulus ◽  
Young's Modulus ◽  
Transformation Strain ◽  
Material Model ◽  
Stress Plateau ◽  
Micromechanical Approach ◽  
Tension And Compression ◽  
Tension Compression Asymmetry

ABSTRACTMany unresolved issues remain in the field of modelling of shape memory alloys. In this paper the problem of unequal elastic properties of austenite and martensite is addressed. We propose a modification of the micromechanical material model that enables the application of different Young's modulus for austenite and martensite. The corresponding computational model for the application of the micromechanical approach to modeling of superelasticity in shape memory alloys is demonstrated. Material properties for Ni-Ti alloy (50.8 at.% Ni) obtained from literature and from our own experiments were applied to the model and a sample calculation of a 3D model subjected to uniaxial loading was performed. The results were compared to experimental results obtained from tensile and compressive tests. In general the presented model predicts well the level of the superelastic stress plateau and maximum transformation strain in tension. The agreement in compression is worse but the overall characteristics of the tension-compression asymmetry are predicted correctly.

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