A meshless IRBFN-based numerical simulation of dynamic strain localization in quasi-brittle materials
Paper
Paper/Presentation Title | A meshless IRBFN-based numerical simulation of dynamic strain localization in quasi-brittle materials |
---|---|
Presentation Type | Paper |
Authors | Le, Phong (Author), Mai-Duy, Nam (Author), Tran-Cong, Thanh (Author) and Baker, Graham (Author) |
Editors | Taylor, R. L., Papadopoulos, P. and Zohdi, T. I. |
Journal or Proceedings Title | Proceedings of the 9th US National Congress on Computational Mechanics (USNCCM9) |
Number of Pages | 1 |
Year | 2007 |
Place of Publication | Austin, TX. United States |
Web Address (URL) of Paper | http://www.me.berkeley.edu/compmat/USACM/main.html |
Conference/Event | USNCCM9: 9th US National Congress on Computational Mechanics |
Event Details | USNCCM9: 9th US National Congress on Computational Mechanics Event Date 22 to end of 26 Jul 2007 Event Location San Francisco, United States |
Abstract | This paper describes an integrated radial basis function network (IRBFN) method for the numerical modelling of the dynamics of strain localization due to strain softening in quasi-brittle materials. The IRBFN method is a truly meshless method that is based on an unstructured point collocation procedure. The integration approach is the key to achieving accurate function derivatives necessary for numerical stability and solution accuracy. A new coordinate mapping technique for the IRBFN method is introduced in this paper to resolve the steep velocity, strain and strain-rate gradients associated with the strain localisation process. The behaviour of a one dimensional bar is investigated using a nonlocal damage model governed by a Telegraph-type constitutive relation. The bar is dynamically loaded in tension with a constant end velocity. The strain waves propagating from the two ends meet at the centre of the bar and causes a large strain increase at this location. This strain increase, under suitable conditions, will initiate the strain localisation process due to the strain-softening constitutive behaviour of the material. Numerical results obtained compare favourably with those obtained by the FEM and demonstrate the efficiency of the present IRBFN approach in solving steep (singularity-like behaviour) nonlinear PDEs encountered. |
Keywords | integrated radial basis function network; numerical modelling; strain localization; quasi-brittle materials |
ANZSRC Field of Research 2020 | 490302. Numerical analysis |
401607. Metals and alloy materials | |
401706. Numerical modelling and mechanical characterisation | |
Public Notes | No evidence of copyright restrictions on web site. Conference publication consists of only the abstracts of papers presented at the conference. Only Abstract available of oral presentation. |
Byline Affiliations | Computational Engineering and Science Research Centre |
Deputy Vice-Chancellor's Office (Scholarship) |
https://research.usq.edu.au/item/9y80v/a-meshless-irbfn-based-numerical-simulation-of-dynamic-strain-localization-in-quasi-brittle-materials
Download files
Published Version
Le_Mai-Duy_Tran-Cong_Baker.pdf | ||
File access level: Anyone |
Other Documentation
USNCCM9_Booklet.pdf | ||
File access level: Anyone |
2444
total views6103
total downloads0
views this month2
downloads this month