Failure modes of composite sandwich beams

被引：28

作者：

Gdoutos, E. E. ^{[1
]}

Daniel, I. M. ^{[2
,3
]}

机构：

[1] Democritus Univ Thrace, Sch Engn, GR-67100 Xanthi, Greece

[2] Northwestern Univ Evanston, Dept Civil Engn, Evanston, IL 60208 USA

[3] Northwestern Univ Evanston, Dept Mech Engn, Evanston, IL 60208 USA

来源：

THEORETICAL AND APPLIED MECHANICS | 2008年 / 35卷 / 1-3期

关键词：

sandwich beams; failure modes; carbon/epoxy facings; foam core; wrinkling; indentation;

D O I：

10.2298/TAM0803105G

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

A thorough investigation of failure behavior of composite sandwich beams under three- and four-point bending was undertaken. The beams were made of unidirectional carbon/epoxy facings and a PVC closed cell foam core. The constituent materials were fully characterized and in the case of the foam core, failure envelopes were developed for general two-dimensional states of stress. Various failure modes including facing wrinkling, indentation failure and core failure were observed and compared with analytical predictions. The initiation, propagation and interaction of failure modes depend on the type of loading, constituent material properties and geometrical dimensions.

引用

页码：105 / 118

页数：14

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