Strain Self-Sensing Property and Strain Rate Dependent Constitutive Model of Austenitic Shape Memory Alloy: Experiment and Theory

Low-energy tensile-impact behavior of superelastic NiTi shape memory alloy wires

“…The quasi-static superelastic tensile behavior has been studied in depth by different researchers from 10 À5 s À1 to 1 s À1 (Chang et al, 2006;Li et al, 2005;Schmidt, 2006;Shaw and Kyriakides, 1995;Tobushi et al, 1998Tobushi et al, , 1999Tobushi et al, , 2005. This characterization has been performed classically by conventional mechanical test methods as screw-driven or servohydraulic load frames.…”

Effect of strain rate on properties of superelastic NiTi thin wires

“…The stress relaxation was attributed to the latent heat released in the specimen during the transformation. Li et al [5] inferred that the pseudo elastic behavior is influenced by both ambient temperature and loading frequency. Nasser and Guo [6] found that the superelastic behavior of these materials have stronger sensitivity to temperature than to strain rate.…”

A Constitutive Model for Superelastic Shape Memory Alloys Considering the Influence of Strain Rate

“…Many experimental studies have shown that the superelastic behavior of SMAs strongly depends on the loading rate [8][9][10]; however, few quantitative relationships are provided [16][17][18]. In this section, a stress change variable, Δ , which is a relative quantity between the dynamic loading condition and the static loading condition at an identical strain, is introduced to evaluate the effect of the strain rate on the superelastic behavior of SMAs.…”

“…(1) phenomenological macroscopic constitutive models in terms of stress, strain, and temperature with assumed phase transformation kinetics described by preestablished simple mathematical functions proposed by Tanaka [11], Liang and Rogers [12], Brinson [13], Boyd and Lagoudas [14,15], Li et al [16], Tobushi et al [17], and Sun and Rajapakse [18]; among others. (2) one-dimensional polynomial models based on Devonshire's theory with an assumed polynomialfree energy potential, which allows superelasticity and SME description, presented by Falk et al [19,20]; (3) thermodynamic models based on the free energy and dissipation potential developed by Patoor et al [21], Sun and Hwang [22,23], Huang and Brinson [24], and Boyd and Lagoudas [25]; (4) plastic flow models based on dislocation theories of solid state physics proposed by Graesser and Cozzarelli [26,27], lately improved by Wilde et al [28], Zhang and Zhu [29], and Ren et al [30].…”