Fracture of Hollow Clay Units Simulated by Sequentially Linear Analysis

Title: Fracture of Hollow Clay Units Simulated by Sequentially Linear Analysis
Author(s): J. Hannawald
Paper category : conference
Book title: International RILEM Conference on Material Science
Editor(s): W. Brameshuber
Print-ISBN: 978-2-35158-108-7
e-ISBN: 978-2-35158-109-4
Publisher: RILEM Publications SARL
Publication year: 2010
Pages: 135 - 144
Total Pages: 10
Nb references: 5
Language: English

Abstract: Negative stiffness due to softening is a major problem in computational modelling of quasi-brittle material fracture. It may lead to numerical instability and divergence of the incremental-iterative procedure. As an alternative, the sequentially linear saw-tooth continuum model has been proposed, which captures the nonlinear response via a series of linear steps [Rot03].
In the present work, the sequentially linear saw-tooth continuum model has been implemented into the open source object-oriented finite element code OOFEM [Pat01a,Pat01b] for linear triangles and quadrilaterals in plane-stress and linear tetraeders and hexaeders. As an application of the model in three dimensions, fracture of a hollow clay unit is analysed. The load response can be traced to complete failure and hence a convincing estimate of the ultimate load can be given. A realistic fracture pattern determined by the regions of strong strain concentration is obtained.

Online publication: 2010-12-02
Publication type : full_text
Public price (Euros): 0.00