Monitoring the failure states of a metal matrix syntactic foam by modal analysis

被引：10

作者：

Kadar, Csilla ^{[1
,2
]}

Szlancsik, Attila ^{[1
,2
]}

Dombovari, Zoltan ^{[2
,3
]}

Orbulov, Imre Norbert ^{[1
,2
]}

机构：

[1] Budapest Univ Technol & Econ, Dept Mat Sci & Engn, Muegyet Rkp 3, H-1111 Budapest, Hungary

[2] MTA BME Lendulet Composite Met Foams Res Grp, Muegyet Rkp 3, H-1111 Budapest, Hungary

[3] Budapest Univ Technol & Econ, Dept Appl Mech, Muegyet Rkp 3, H-1111 Budapest, Hungary

来源：

MATERIALS LETTERS | 2019年 / 257卷

关键词：

Porous materials; Deformation and fracture; Modal analysis; Syntactic foams; YOUNGS MODULUS; CONCRETE;

D O I：

10.1016/j.matlet.2019.126733

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents a new non-destructive method applying modal analysis to determine the failure state of the AlSi12 matrix syntactic foam containing ceramic hollow spheres. The results proved that the decrease in natural frequencies of the first two modes and the calculated effective Young's modulus indicate the damage state of the syntactic foam's structure during compression. Both the natural frequencies and the elastic modulus start to change after the onset of fracture of hollow spheres, which is similar to 60 MPa, according to our previous work. A 5% decrease in these parameters are suggested as a practical limit of the deterioration of a load-bearing structure, which collides with the maximum in the acoustic emission activity. (C) 2019 Elsevier B.V. All rights reserved.

引用

页数：3

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