A two-dimensional ordinary state-based peridynamic model for surface fatigue crack propagation in railheads. (15th April 2022)

• Record Type: Journal Article
• Authors: Ma, Xiaochuan; Wang, Li; Xu, Jinhui; Feng, Qingsong; Liu, Linya; Chen, Huapeng
• Is Part Of: Engineering fracture mechanics. Volume 265(2022)
• Publication Date: 2022-04-15
• Subjects: Fatigue -- Peridynamic model -- Crack propagation -- Railway -- Wheel-rail contact; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2022.108362
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: A 2D ordinary state-based peridynamic model studying rail crack propagation is proposed. Wheel load is the primary factor influencing the direction and speed of crack propagation. Proper lubrication may elongate the rail fatigue life. Abstract: Based on ordinary state-based peridynamic theory, a 2D peridynamic model has been established to investigate fatigue crack propagation in railheads. The proposed model is verified in terms of rail deformation under a quasi-static load and the ductile material-related fatigue failure model. Good agreements have been achieved between a finite element model and the experimental results. With the proposed model, the effects of the initial crack angle, initial crack length and wheel-rail friction coefficient on crack propagation in railheads are studied. This research provides a new method for studying crack propagation in railheads.