A Comparison of 2-zone and 3-zone Models in Tearing based on Essential Work of Fracture

Document type: Conference Papers
Peer reviewed: Yes
Full text:
Author(s): Sharon Kao-Walter, Min Hu, Mats Walter, Armando Leon
Title: A Comparison of 2-zone and 3-zone Models in Tearing based on Essential Work of Fracture
Conference name: 12th Int. Conference on Fracture
Year: 2009
Pagination: 359
Publisher: Natural resources Canada
City: Ottawa
Organization: Blekinge Institute of Technology
Department: School of Engineering - Dept. of Mechanical Engineering (Sektionen för ingenjörsvetenskap - avd. för maskinteknik)
School of Engineering S- 371 79 Karlskrona
+46 455 38 50 00
http://www.bth.se/ing/
Authors e-mail: skw@bth.se
Language: English
Abstract: Two different models (2-zone and 3-zone) for describing the deformation and fracture behavior of tearing ligament was compared and discussed based on the experimental results made by Kim et al. The models are based on the Essential Work of Fracture approach for predicting the specific total work of fracture along the tear path across plastic zones. The experiment and analysis were based on 2-leg trousers tear specimen. The materials chosen in this work were PET (0.508 mm). The results showed that the accuracy of 3-zone model was higher than 2-zone model. It was found that this difference is because the 2-zone model did not consider the plastic deformation caused by loading prior to tearing. Also a finite element model was created to simulate the behavior around the crack tip.
Subject: Mechanical Engineering\General
Mechanical Engineering\Structural Mechanics
Keywords: tearing, Essential Work of Fracture, plastic zones
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