Syntactic foam core metal matrix sandwich composite under bending conditions

被引：39

作者：

Omar, Mohammed Yaseer ^{[1
]}

Xiang, Chongchen ^{[1
]}

Gupta, Nikhil ^{[1
]}

Strbik, Oliver M., III ^{[2
]}

Cho, Kyu ^{[3
]}

机构：

[1] NYU, Polytech Sch Engn, Mech & Aerosp Engn Dept, Composite Mat & Mech Lab,MetroTech Ctr 6, Brooklyn, NY 11201 USA

[2] Deep Springs Technol Inc, Toledo, OH 43615 USA

[3] US Army Res Lab, Weap & Mat Res Directorate, Aberdeen Proving Ground, MD 21005 USA

来源：

MATERIALS & DESIGN | 2015年 / 86卷

基金：

美国国家科学基金会;

关键词：

Metal matrix composite; Sandwich composite; Syntactic foam; Flexural properties; TENSILE-STRENGTH; BEAMS; COLLAPSE; FAILURE; PERFORMANCE; DAMAGE; MODES;

D O I：

10.1016/j.matdes.2015.07.127

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The present work aims at characterizing a metal matrix syntactic foam core sandwich composite under three-point bending conditions. The sandwich comprises alumina hollow particle reinforced A356 alloy syntactic foam with carbon fabric skins. Crack initiation in the tensile side of the specimen causing failure of the skin, followed by rapid failure of the core in the direction applied load, is observed as the failure mechanism. Crack propagation through the alumina particles is observed in the failed specimens instead of interfacial failure. The average maximum strength, flexural strain and stiffness were measured as 91.2 +/- 5.6 MPa, 0.49 +/- 0.06% and 20.6 +/- 0.7 GPa respectively. The collapse load is theoretically predicted using mechanics of sandwich beams. Experimental values show good agreement with theoretical predictions. (C) 2015 Elsevier Ltd. All rights reserved.

引用

页码：536 / 544

页数：9

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