Publication detail
Crack stability condition at the interface between two polymer materials
ZOUHAR, M. HUTAŘ, P. NÁHLÍK, L. ŠEVČÍK, M. KNÉSL, Z.
Czech title
Podmínka stability trhliny na materiálovém rozhranní mezi dvěma polymerními materiály
English title
Crack stability condition at the interface between two polymer materials
Type
conference paper
Language
en
Original 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.
Czech abstract
Cílem této práce je stadium chování trhliny s vrcholem na materiálovém rozhranní mezi dvěma polymerními materiály. Byl vytvořen numerický model bi-materiálového tahového vzorku a bylo aplikováno kritérium stability. V kritérii stability se objevuje vztah, který je funkcí elastických materiálových vlastností, lomové houževnatosti základního materiálu a kritické vzdálenosti d. Stanovení parametru d není často přímé a různí autoři používají různých přístupů pro jejích stanovení. Hlavním cílem této práce je porovnání publikovaných přístupů pro stanovení velikosti parametru d a stanovení vlivu jejich efektu na hodnotu kritického zatížení.
English 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 in Czech
kritérium stability, kritická vzdálenost, bi-materiál, zobecněný součinitel intenzity napětíc
Keywords in English
stability criterion, critical distance, bi-material, generalized stress intensity factor
RIV year
2011
Released
18.04.2011
ISBN
978-80-87434-03-1
Book
Applied mechanics 2011 conference proceedings
Pages from–to
247–250
Pages count
4
BIBTEX
@inproceedings{BUT76022,
author="Michal {Zouhar} and Pavel {Hutař} and Luboš {Náhlík} and Martin {Ševčík} and Zdeněk {Knésl},
title="Crack stability condition at the interface between two polymer materials",
booktitle="Applied mechanics 2011 conference proceedings",
year="2011",
month="April",
pages="247--250",
isbn="978-80-87434-03-1"
}