Please use this identifier to cite or link to this item:
|Title:||A novel general formulation for singular stress field using the ES-FEM method for the analysis of mixed-mode cracks||Authors:||Liu, G.R.
|Keywords:||Mesh free method
Mixed mode crack problems
Singular smoothed finite element method
Smoothed finite element method
|Issue Date:||Mar-2010||Citation:||Liu, G.R., Nourbakhshnia, N., Chen, L., Zhang, Y.W. (2010-03). A novel general formulation for singular stress field using the ES-FEM method for the analysis of mixed-mode cracks. International Journal of Computational Methods 7 (1) : 191-214. ScholarBank@NUS Repository. https://doi.org/10.1142/S0219876210002131||Abstract:||This paper presents a general formulation for simulating the singular stress field at the vicinity of the crack-tip for linear fracture mechanics problems, based on the edge-based smoothed finite element method (ES-FEM) settings. This novel "singular ES-FEM" makes use of the unique feature offered by the ES-FEM that only the assumed displacement values (not the derivatives) are required to compute the stiffness matrix of the discretized system. The present singular ES-FEM method uses a basic mesh of linear triangular elements and a layer of novel "five-noded crack-tip elements" sharing the crack-tip node. The five-noded crack-tip element has one additional node on each of the edges connected to the crack-tip, and the locations of the "edge-node" can be arbitrary. A number of examples are analyzed and the results demonstrate that the present singular ES-FEM is generally softer and much more accurate than the existing FEM. The stress intensity factors obtained using the singular ES-FEM are very stable for different area-integration paths designed around the crack-tip. The present singular ES-FEM is found an excellent alternative to the standard FEM for fracture problems. © 2010 World Scientific Publishing Company.||Source Title:||International Journal of Computational Methods||URI:||http://scholarbank.nus.edu.sg/handle/10635/51305||ISSN:||02198762||DOI:||10.1142/S0219876210002131|
|Appears in Collections:||Staff Publications|
Show full item record
Files in This Item:
There are no files associated with this item.
checked on May 29, 2020
WEB OF SCIENCETM
checked on May 29, 2020
checked on Jun 1, 2020
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.