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复合材料孔隙形貌特征对超声波散射衰减影响分析

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Indexed by:期刊论文

Date of Publication:2010-01-01

Journal:中国机械工程

Included Journals:Scopus、PKU、ISTIC、CSCD

Volume:21

Issue:14

Page Number:1735-1741

Key Words:复合材料; 孔隙形貌; 超声波衰减系数; 随机孔隙模型

Abstract:采用有限差分正演模拟方法,针对基于统计学原理建立的复合材料二维随机孔隙模型,在保持孔隙率不变的前提下,计算了孔隙形状、取向及数量等因素单一变化及
   孔隙形貌特征多因素随机变化下的超声波衰减系数,并以0.03%~4.62%孔隙率的碳纤维复合材料为例,比较了超声波衰减系数的理论计算结果和实验测试
   结果. 研究表明,孔隙形状(宽长比)、取向和数量均对超声波衰减系数有影响,且孔隙形貌的随机性会引起超声波衰减系数的波动.

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