An adaptive remeshing technique for predicting the growth of irregular crack fronts using p-version finite element analysis. (15th February 2019)

• Record Type: Journal Article
• Authors: Wowk, Diane; Alousis, Lucas; Underhill, P. Ross
• Is Part Of: Engineering fracture mechanics. Volume 207(2019)
• Page Start: 36
• Page End: 47
• Publication Date: 2019-02-15
• Subjects: Finite element -- P-version -- Crack growth -- Corner crack -- Adaptive remeshing; Fracture mechanics -- Periodicals; Rupture, Mécanique de la -- Périodiques; Fracture mechanics; Periodicals; 620.112605
• DOI: 10.1016/j.engfracmech.2018.12.002
• Languages: English
• ISSNs: 0013-7944

Abstract

Highlights: P-method FEA was successfully used to predict growth of irregular crack fronts. High-resolution spline successfully used with adaptive remeshing technique. Adaptive remeshing successfully used for crack fronts with small radius of curvature. Crack front with convex and concave regions and changes in curvature were simulated. Predictions of crack shape for irregular geometry agreed with experimental results. Abstract: An adaptive remeshing technique using p-version finite element analysis was developed to predict the growth of cracks with highly irregular crack front geometries. In order to represent the shape of the crack front, the commonly used ellipse was replaced by a high-resolution spline. This enabled the growth of irregular crack fronts with local changes in curvature, convex and concave regions and small radii of curvature to be simulated iteratively using automatic mesh generation. The method was demonstrated for an irregular corner crack at a notch and the predicted crack front geometry was shown to be in good agreement with experimental results.