Original title: Crack stability condition at the interface between two polymer materials
Authors: Zouhar, Michal ; Hutař, Pavel ; Náhlík, Luboš ; Ševčík, Martin ; Knésl, Zdeněk
Document type: Papers
Conference/Event: Applied Mechanics 2011, Velké Bílovice (CZ), 2011-04-18 / 2011-04-20
Year: 2011
Language: eng
Abstract: The aim of this work is to study the behaviour of crack with its tip at the interface of two polymer materials. The numerical model of cracked bi-material tension specimen is investigated and a stability criterion was tested. Usually a stability criterion based on general stress concentrator needs the relation between critical value of the generalized stress intensity factor and critical value of the stress intensity factor (fracture toughness). This relation is a function of elastic mismatch between particular materials, fracture toughness of the main material and critical distance d. Estimation of d is usually not straightforward and different authors use different approaches for its determination. Therefore main aim of this study is mutual comparison of published approaches for d estimation and to quantify their effect on the critical loading value. The results of this study can lead to better lifetime prediction and design of layered structures.
Keywords: bi-material; critical distance; generalized stress intensity factor; stability criterion
Project no.: CEZ:AV0Z20410507 (CEP), GA106/09/0279 (CEP)
Funding provider: GA ČR
Host item entry: Applied Mechanics 2011, ISBN 978-80-87434-03-1

Institution: Institute of Physics of Materials AS ČR (web)
Document availability information: Fulltext is available at the institute of the Academy of Sciences.
Original record: http://hdl.handle.net/11104/0204179

Permalink: http://www.nusl.cz/ntk/nusl-80998


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