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Strength-toughening model of eutectic ceramic composite with inherent defects

Strengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the... Full description

Journal Title: Chinese Journal of Mechanical Engineering 2014, Vol.27(4), pp.754-760
Main Author: Fu, Yunwei
Other Authors: Zhang, Long , Ni, Xinhua , Liu, Xiequan , Chen, Cheng , Zhao, Siyuan
Format: Electronic Article Electronic Article
Language: English
Subjects:
ID: ISSN: 1000-9345 ; E-ISSN: 2192-8258 ; DOI: 10.3901/CJME.2014.0418.077
Link: http://dx.doi.org/10.3901/CJME.2014.0418.077
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recordid: springer_jour10.3901/CJME.2014.0418.077
title: Strength-toughening model of eutectic ceramic composite with inherent defects
format: Article
creator:
  • Fu, Yunwei
  • Zhang, Long
  • Ni, Xinhua
  • Liu, Xiequan
  • Chen, Cheng
  • Zhao, Siyuan
subjects:
  • inherent defects
  • pull-out toughening
  • toughness function
  • strength
ispartof: Chinese Journal of Mechanical Engineering, 2014, Vol.27(4), pp.754-760
description: Strengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the mechanism of failure in composite ceramics. The exponential toughness function is used to represent the pull-out toughening mechanism, which dominates the crack growth resistance curve( R -curve). The strengthening-toughening model is established based on the Mori-Tanaka method(M-T method). The influence of inherent defects on toughness function and strength is analyzed by using this model. The theoretical result is compared with the experiment data. This model exactly reflects the change in strength. The theoretical result indicates that defects change the toughness function. Moreover, micro-cracks increase toughness size a c , and the strength of crack instable extensions acutely decreases as defect content increases. This presented model establishes the relationship among the important mechanical parameters of defect, strength, elastic modulus, and the R -curve.
language: eng
source:
identifier: ISSN: 1000-9345 ; E-ISSN: 2192-8258 ; DOI: 10.3901/CJME.2014.0418.077
fulltext: fulltext
issn:
  • 2192-8258
  • 21928258
  • 1000-9345
  • 10009345
url: Link


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descriptionStrengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the mechanism of failure in composite ceramics. The exponential toughness function is used to represent the pull-out toughening mechanism, which dominates the crack growth resistance curve( R -curve). The strengthening-toughening model is established based on the Mori-Tanaka method(M-T method). The influence of inherent defects on toughness function and strength is analyzed by using this model. The theoretical result is compared with the experiment data. This model exactly reflects the change in strength. The theoretical result indicates that defects change the toughness function. Moreover, micro-cracks increase toughness size a c , and the strength of crack instable extensions acutely decreases as defect content increases. This presented model establishes the relationship among the important mechanical parameters of defect, strength, elastic modulus, and the R -curve.
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descriptionStrengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the mechanism of failure in composite ceramics. The exponential toughness function is used to represent the pull-out toughening mechanism, which dominates the crack growth resistance curve( R -curve). The strengthening-toughening model is established based on the Mori-Tanaka method(M-T method). The influence of inherent defects on toughness function and strength is analyzed by using this model. The theoretical result is compared with the experiment data. This model exactly reflects the change in strength. The theoretical result indicates that defects change the toughness function. Moreover, micro-cracks increase toughness size a c , and the strength of crack instable extensions acutely decreases as defect content increases. This presented model establishes the relationship among the important mechanical parameters of defect, strength, elastic modulus, and the R -curve.
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abstractStrengthening and toughening mechanisms in composite ceramics is complex. A change in a single parameter induces multiple property variations. The multiple changes in properties are often incompletely represented in theoretical models. This incompleteness in the parameter chosen fails to explain the mechanism of failure in composite ceramics. The exponential toughness function is used to represent the pull-out toughening mechanism, which dominates the crack growth resistance curve( R -curve). The strengthening-toughening model is established based on the Mori-Tanaka method(M-T method). The influence of inherent defects on toughness function and strength is analyzed by using this model. The theoretical result is compared with the experiment data. This model exactly reflects the change in strength. The theoretical result indicates that defects change the toughness function. Moreover, micro-cracks increase toughness size a c , and the strength of crack instable extensions acutely decreases as defect content increases. This presented model establishes the relationship among the important mechanical parameters of defect, strength, elastic modulus, and the R -curve.
copBeijing
pubChinese Mechanical Engineering Society
doi10.3901/CJME.2014.0418.077
pages754-760
date2014-07