Finite Element Analysis for the Self-Loosening Behavior of the Bolted Joint with a Superelastic Shape Memory Alloy

• Published in: Materials Vol. 11; no. 9; p. 1592
• Main Authors: Jiang, Xiangjun, Huang, Jin, Wang, Yongkun, Li, Baotong, Du, Jingli, Hao, Peng
• Format: Journal Article
• Language: English
• Published: Switzerland MDPI AG 02.09.2018; MDPI
• Subjects: Alloys; Bolted joints; Constitutive models; Cyclic loads; Deformation; Design; Earthquakes; Energy dissipation; Evolution; Finite element analysis; Finite element method; finite element modeling; Hysteresis loops; Load; Loosening; Martensite; Martensitic transformations; Mathematical analysis; Mathematical models; Metal fatigue; Phase transitions; Ratcheting; self-loosening of bolt; Shape memory alloys; Superelasticity; Washers & dryers; shape memory alloys; ratcheting; finite element modeling; self-loosening of bolt
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma11091592

A macroscopic constitutive model is proposed in this research to reproduce the uniaxial transition ratcheting behaviors of the superelastic shape memory alloy (SMA) undergoing cyclic loading, based on the cosine-type phase transition equation with the initial martensite evolution coefficient that provides the predictive residual martensite accumulation evolution and the nonlinear feature of hysteresis loop. The calculated results are compared with the experimental results to show the validity of the present computational procedure in transition ratcheting. Finite element implementation for the self-loosening behavior of the superelastic SMA bolt is then carried out based on the proposed constitutive model to analyze the curves of stress-strain responses on the bolt bar, clamping force reduction law, dissipation energy change law of the bolted joint for different external loading cases, and preload force of the bolt.