Fracture mechanics investigation of interacting defects in composite materials

With the increasing applications of composite materials in various engineering structures, failure analysis on crack induced fracture problems in composite materials has attracted more and more attention among researchers. In the current work, with the plastic zone corrections, the elastic-plastic f...

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Main Author: Fan Mu
Other Authors: Xiao Zhongmin
Format: Theses and Dissertations
Language:English
Published: 2015
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Online Access:https://hdl.handle.net/10356/65446
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Institution: Nanyang Technological University
Language: English
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spelling sg-ntu-dr.10356-654462023-03-11T16:52:04Z Fracture mechanics investigation of interacting defects in composite materials Fan Mu Xiao Zhongmin School of Mechanical and Aerospace Engineering DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics With the increasing applications of composite materials in various engineering structures, failure analysis on crack induced fracture problems in composite materials has attracted more and more attention among researchers. In the current work, with the plastic zone corrections, the elastic-plastic fracture behavior investigations on crack problems in different configurations have been carried out. Two approaches of plastic zone correction are demonstrated. The first one is the mixed-mode Dugdale model for interface cracks and the second one is the generalized Irwin model which is suitable for matrix cracking. The introduction of plastic zone can greatly improve the accuracy of fracture prediction in fiber-reinforced composite materials with ductile matrix. Based on the two models, the problem of a crack lying at the interface of two semi-infinite plate, and crack-coated inclusion interactions have been studied. Numerical examples are given to show the influence of different kinds of parameters on the plastic zone size and crack tip opening displacement of each problems. Some useful conclusions have been figured out after the investigation. DOCTOR OF PHILOSOPHY (MAE) 2015-09-28T02:42:01Z 2015-09-28T02:42:01Z 2015 2015 Thesis Fan Mu. (2015). Fracture mechanics investigation of interacting defects in composite materials. Doctoral thesis, Nanyang Technological University, Singapore. https://hdl.handle.net/10356/65446 10.32657/10356/65446 en 177 p. application/pdf
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
spellingShingle DRNTU::Engineering::Mechanical engineering::Mechanics and dynamics
Fan Mu
Fracture mechanics investigation of interacting defects in composite materials
description With the increasing applications of composite materials in various engineering structures, failure analysis on crack induced fracture problems in composite materials has attracted more and more attention among researchers. In the current work, with the plastic zone corrections, the elastic-plastic fracture behavior investigations on crack problems in different configurations have been carried out. Two approaches of plastic zone correction are demonstrated. The first one is the mixed-mode Dugdale model for interface cracks and the second one is the generalized Irwin model which is suitable for matrix cracking. The introduction of plastic zone can greatly improve the accuracy of fracture prediction in fiber-reinforced composite materials with ductile matrix. Based on the two models, the problem of a crack lying at the interface of two semi-infinite plate, and crack-coated inclusion interactions have been studied. Numerical examples are given to show the influence of different kinds of parameters on the plastic zone size and crack tip opening displacement of each problems. Some useful conclusions have been figured out after the investigation.
author2 Xiao Zhongmin
author_facet Xiao Zhongmin
Fan Mu
format Theses and Dissertations
author Fan Mu
author_sort Fan Mu
title Fracture mechanics investigation of interacting defects in composite materials
title_short Fracture mechanics investigation of interacting defects in composite materials
title_full Fracture mechanics investigation of interacting defects in composite materials
title_fullStr Fracture mechanics investigation of interacting defects in composite materials
title_full_unstemmed Fracture mechanics investigation of interacting defects in composite materials
title_sort fracture mechanics investigation of interacting defects in composite materials
publishDate 2015
url https://hdl.handle.net/10356/65446
_version_ 1761781594324992000