Mesh size effects on fracture locus of high strength bolts: A mesoscale critical equivalent plastic strain (MCEPS) approach. (August 2022)

• Record Type: Journal Article
• Authors: Li, Jie; Xin, Haohui; Correia, José A.F.O.; Berto, Filippo; Zhao, Bingzhen; Bo, Yanwei; Veljkovic, Milan
• Is Part Of: Engineering failure analysis. Volume 138(2022)
• Publication Date: 2022-08
• Subjects: High strength bolts -- Ductile fracture -- Finite element simulation -- Mesh size sensitivity; System failures (Engineering) -- Periodicals; Fracture mechanics -- Periodicals; Reliability (Engineering) -- Periodicals; Pannes -- Périodiques; Rupture, Mécanique de la -- Périodiques; Fiabilité -- Périodiques; Fracture mechanics; Reliability (Engineering); System failures (Engineering); Periodicals; Electronic journals; 620.112
• DOI: 10.1016/j.engfailanal.2022.106385
• Languages: English
• ISSNs: 1350-6307

Abstract

Highlights: Mesoscale critical equivalent plastic strain (MCEPS) was used as a failure index to calibrate the fracture parameters of Grade 8.8, 10.9, and 12.9 high-strength bolts. Three various mesh sizes (0.25 mm, 0.50 mm, and 0.75 mm) are employed in finite element software ABAQUS. Static general solver and dynamic explicit solver are used in the calibration of plastic flow curve and fracture parameters of the model, respectively. Abstract: With the improvement of computational capability, finite element simulation is an increasingly practical method to accurately predict the ultimate capacity and ductile fracture behavior of high-strength bolts. However, the mesh size affects the results of FE simulations but related research on mesh size effects is relatively limited. In the present contribution, the mesoscale critical equivalent plastic strain (MCEPS) is used as a failure index for calibrating the parameters of ductile fracture locus of high-strength bolts with different mesh sizes. The identified fracture locus is compared with a large bulk of experimental data taken from the previously published literature. The results showed that mesh size can have high effects on the calibrated parameters of the plastic constitutive relationship after necking and ductile fracture locus of high-strength bolts.