Fracture behavior of the compact tension specimens in NiTi shape memory alloys

Wang, Xinmei; Xu, Baicheng; Yue, Zhufeng; Tong, Xiaoyan

doi:10.1016/j.msea.2007.07.056

Cited by 19 publications

(10 citation statements)

References 27 publications

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“…This was verified for all the temperatures studied. These findings were also obtained by Siredey and Eberhardt [16], when analysing the fatigue behavior of a CuAlBe alloy, and by Wang et al [26] when studying the compact tension in a NiTi alloy. However, in our work, dimple zones were only observed in the CuAlBeNbNi alloy at the temperature of −50 • C. For the temperature of −50 • C, as well as for all the other temperatures evaluated, stereomicroscopy revealed brittle fractures on very homogeneous surfaces of the CuAlBeNbNi alloy samples (Fig.…”

Section: Resultssupporting

confidence: 69%

Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Albuquerque

Melo

Gomes

et al. 2010

Materials Science and Engineering: A

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Section: Resultssupporting

confidence: 69%

Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Albuquerque

Melo

Gomes

et al. 2010

Materials Science and Engineering: A

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“…In this example, a compact-tension specimen with a notch is numerically simulated. Geometry and dimensions of the experimental model [40] are presented in figure 13(a). A finite element mesh with bilinear quadrilateral elements is used to discretize the domain, as shown in figure 13(b).…”

Section: Compact Tension Test With the Thermo-mechanical Coupling Eff...mentioning

confidence: 99%

Thermo-mechanically coupled fracture analysis of shape memory alloys using the extended finite element method

Ardakani

Ahmadian

Mohammadi

2015

Smart Mater. Struct.

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In this paper, the extended finite element method is used for fracture analysis of shape memory alloys for both cases of super elastic and shape memory effects. Heat generation during the forward and reverse phase transformations can lead to temperature variation in the material because of strong thermo-mechanical coupling, which significantly influences the SMA mechanical behavior. First, the stationary crack mode is studied and the effects of loading rate on material behavior in the crack tip are examined. Then, the crack propagation analysis is performed in the presence of an initial crack by adopting a weighted averaging criterion, where the direction of crack propagation is determined by weighted averaging of effective stresses at all the integration points in the vicinity of the crack tip. Finally, several numerical examples are analyzed and the obtained results are compared with the available reference results.

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“…Several authors have presented work in the literature regarding numerical investigations of shape memory alloy fracture behavior [10][11][12][13][14][15][16][17][18][19][20]. It is evident from the results found in the literature that the fracture toughness is enhanced by martensite transformation.…”

Section: Introductionmentioning

confidence: 99%

Effect of notches on the behavior of superelastic round-bar NiTi-specimens

Olsen

Zhang

Hals

et al. 2011

Smart Mater. Struct.

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Several studies have recently been dedicated towards understanding failure mechanisms in shape memory alloys. Many of these investigations indicate that triaxial stress and stress-concentration affect the fracture behavior of these materials. However, few have made an attempt to characterize the effect of these features on the superelastic behavior of shape memory alloy specimens. In this work, notched round-bar NiTi-specimens have been subjected to a simple set of experimental tests and an extensive numerical investigation. Both the cases of tensile loading and one-cycle loading have been studied. A superelastic-plastic constitutive model is used in this work. The main results show that notches can have a negative effect on the superelastic behavior in NiTi, and that this is related to the development of plastic strains in the material. It was expected that introducing notches would induce residual strain at an early stage. However, for strains up to ∼4%, i.e. just exceeding the transformation length, only the smallest notch investigated herein developed residual strain. By employing the onset of plastic deformation as a criterion for superelastic deterioration, a design window was established to determine the deformation level at which notches become detrimental to superelastic recovery.

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Fracture behavior of the compact tension specimens in NiTi shape memory alloys

Cited by 19 publications

References 27 publications

Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Grain size and temperature influence on the toughness of a CuAlBe shape memory alloy

Thermo-mechanically coupled fracture analysis of shape memory alloys using the extended finite element method

Effect of notches on the behavior of superelastic round-bar NiTi-specimens

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