陈军

个人信息Personal Information

副教授

硕士生导师

性别:男

出生日期:1965-06-03

毕业院校:大连理工大学

学位:博士

所在单位:材料科学与工程学院

学科:材料无损检测与评价

办公地点:大连理工大学材料馆230房间

联系方式:0411-84707117

电子邮箱:chenjun@dlut.edu.cn

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A novel 2-D random void model and its application in ultrasonically determined void content for composite materials

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论文类型:期刊论文

发表时间:2011-05-01

发表刊物:NDT & E INTERNATIONAL

收录刊物:SCIE、EI

卷号:44

期号:3

页面范围:254-260

ISSN号:0963-8695

关键字:Random void model; Composite materials; Porosity; Ultrasonic attenuation

摘要:A two-dimensional (2-D) Random Void Model (RVM) is innovatively developed to describe random voids and to quantitatively correlate ultrasonic attenuation coefficient with void content of composite materials. The spatial autocorrelation function and statistical parameters are used to describe the large-scale heterogeneity from the composite matrix and the small-scale heterogeneities of elastic fluctuations from random voids. The RVMs of Carbon Fiber Reinforced Polymer (CFRP) composite specimens over a void content range of 0.03-4.62% are presented. Outstanding improvements of geometric simulations of voids morphology and quantitative correlation of porosity and ultrasonic attenuation coefficient at 5 MHz are observed. It is concluded that this method is suitable to identify random voids and to predict void content of composite materials nondestructively. (C) 2010 Elsevier Ltd. All rights reserved.