- Title
- Automatic dynamic crack propagation modeling using polygon scaled boundary finite elements
- Creator
- Ooi, Ean Tat; Shi, Mingguang; Song, Chongmin; Tin-Loi, Francis; Yang, Zhenjun
- Date
- 2013
- Type
- Text; Conference proceedings
- Identifier
- http://researchonline.federation.edu.au/vital/access/HandleResolver/1959.17/103316
- Identifier
- vital:10921
- Identifier
- ISBN:9780415633185
- Abstract
- This study develops a simple and efficient methodology for automatic dynamic crack propagation modeling in structures. It uses high order, arbitrary n-sided polygon elements that are constructed within the scaled boundary finite element framework. Each polygon is treated as a scaled boundary finite element subdomain and their governing equations of equilibrium are assembled using standard finite element procedures. Polygon meshes are automatically generated from a Delaunay triangulated mesh. This method inherits all the positive characteristics of the scaled boundary finite element method. Orders of singularities of any kind can be accurately represented in a unified manner by generalized stress intensity factors to evaluate the crack propagation criterion without dense meshes around the crack tip, special purpose elements or nodal enrichment functions. Crack propagation is efficiently modeled using a simple, yet flexible automatic local remeshing algorithm that is linked to the pre-processing module of a commercial finite element package and can be applied to any polygon mesh. Remeshing involves only polygons around the crack and only minimally changes the global mesh structure. Application of the methodology to model dynamic crack propagation problems is demonstrated by two numerical examples. It is found that the predicted dynamic fracture parameters e.g. dynamic stress intensity factor histories, crack velocity histories, crack length histories and crack paths show good agreement with experiment observations and numerical simulations reported in the literature. © 2013 Taylor & Francis Group.; From Materials to Structures: Advancement Through Innovation - Proceedings of the 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012
- Relation
- 22nd Australasian Conference on the Mechanics of Structures and Materials, ACMSM 2012; Sydney, NSW; Australia; 11th-14th Dec 2012 published in From Materials to Structures: Advancement Through Innovation p. 411-416
- Rights
- © 2013 Taylor & Francis Group.
- Rights
- This metadata is freely available under a CCO license
- Subject
- Automatically generated; Dynamic crack propagation; Dynamic stress intensity factors; Finite element packages; Generalized stress intensity factors; Scaled boundary finite element method; Special-purpose elements; Standard finite element; Crack propagation; Crack tips; Dynamics; Geometry; Cracks
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