Mohammadgholipour Ali, Billah Ahm Muntasir
Department of Civil Engineering, University of Calgary, Calgary, AB, Canada.
J Intell Mater Syst Struct. 2023 Dec;34(20):2335-2359. doi: 10.1177/1045389X231185458. Epub 2023 Jun 30.
Shape Memory Alloys (SMAs) are an innovative material with the unique features of superelasticity and energy dissipation capabilities under extreme loads. Due to their unique features, they have a great potential to be employed in structural engineering applications under different conditions. However, in order to effectively use SMAs in civil engineering structures and model their behaviors accurately in Finite Element (FE) packages, it is crucial for structural engineers to comprehend the mechanical properties and cyclic behavior of different SMA compositions under varying loading conditions. While previous studies have focused mainly on the cyclic behavior of SMAs under tensile loading, it is important to evaluate their fatigue behavior under cyclic tension-compression loading for seismic applications. This literature review aims to discuss the current gaps in the existing literature on the behavior of SMA rebars under low-cycle fatigue (LCF). The review provides a comprehensive overview of the primary characteristics of SMAs, summarizes the mechanical properties of SMAs presented in the literature and the parameters that affect them, and critically evaluates the effects of cyclic loading and LCF on SMAs. The review also provides a summary of the different constitutive models of SMAs and compares their advantages and limitations, which helps structural engineers to employ an appropriate constitutive model for predicting the accurate behavior of SMAs in FE software.
形状记忆合金(SMA)是一种具有创新性的材料,在极端载荷下具有超弹性和能量耗散能力等独特特性。由于其独特特性,它们在不同条件下的结构工程应用中具有巨大潜力。然而,为了在土木工程结构中有效使用形状记忆合金并在有限元(FE)软件包中准确模拟其行为,结构工程师理解不同形状记忆合金成分在不同加载条件下的力学性能和循环行为至关重要。虽然先前的研究主要集中在形状记忆合金在拉伸载荷下的循环行为,但评估其在循环拉压载荷下的疲劳行为对于地震应用很重要。这篇文献综述旨在讨论现有文献中关于形状记忆合金钢筋在低周疲劳(LCF)下行为的当前差距。该综述全面概述了形状记忆合金的主要特性,总结了文献中呈现的形状记忆合金的力学性能及其影响参数,并批判性地评估了循环加载和低周疲劳对形状记忆合金的影响。该综述还总结了形状记忆合金的不同本构模型,并比较了它们的优缺点,这有助于结构工程师在有限元软件中采用合适的本构模型来预测形状记忆合金的准确行为。