竞彩网篮球开奖 :CIMSՓĵ

򾺲 www.fasfz.com  

X-ray 3D microscopy analysis of fracture mechanisms for 3D orthogonal woven E-glass/epoxy composites with drilled and moulded-in holes

ע⣺ՓComposites Part B 133 (2018) 193202.l
ʹՈעՓij̎

Fujun Xu a, b, Lijun Sun a, Lvtao Zhu c, Shu Yang d, David Hui e, Yiping Qiu a, b, *
a Key Laboratory of Textile Science & Technology, Ministry of Education (Donghua University), Shanghai 201620, China
b College of Textiles, Donghua University, Shanghai 201620, China
c College of Materials and Textiles, Zhejiang Sci-Tech University, Hangzhou, 310018, China
d College of Nanhu, Jiaxing University, Jiaxing 314000, China
e Department of Mechanical Engineering, University of New Orleans, New Orleans, LA 70148, USA


Abstract
As a promising structural material, three dimensional woven fabric reinforced composites are subjected to machining or drilling during manufacturing processes for components assembly. In-plane tensile and flexural properties of a three dimensional orthogonal woven E-glass/epoxy composites (3DOWC) with 4 and 6 mm drilled holes (DH) and moulded-in holes (MH) are investigated. 2D woven E-glass/epoxy laminated composites (2DWC) with the same drilled hole sizes are also tested for comparison. Two different calculation methods based on gross and net sectional area are adopted to evaluate the effects of the holes on mechanical performance of the composites. The 3DOWC-MH possesses the highest tensile and flexural strength, followed by 3DOWC-DH and 2DWC-DH. As the hole diameter increases, the mechanical properties of all the composites degrade, while those of the 3DOWC-MH increases when the net sectional areas are used for calculation. X-ray 3D microscopy and scanning electron microscopy are employed to analyze damages at submicron level resulted from the tests. Various failure modes such as fiber fracture, matrix cracking and tow debonding are observed, while serious delamination occurs in 2DWC but not in 3DOWC.
Keywords:3D woven composites;Drilled holes;Tensile property;Flexural property

1g[PDFʽȫҪʹܛAbode Acrobat(ܛ^󲢳Ҋ,վṩd)

2dՓȫՈcI顱ʹÔcmܛd(3269KB)


վ䛵ıߵՓģ

1 Tensile and interfacial properties of polyacrylonitrile-based carbon fiber after different cryogenic treated condition
2Characterization of enhanced interfacial bonding between epoxy and plasma functionalized carbon nanotube films
3Modification of tensile, wear and interfacial properties of Kevlar fibers under cryogenic treatment
4Flexible strain sensor based on aerogel-spun carbon nanotube yarn with a core-sheath structure

PՓՈcվ<<<վȫ>>>

gӭӑՓlՓļоIĿ
(Ոڰlԕrژ}ʹcuՓĵ}Ŀо@ӷҞg[)

| CIMSՓ | й | ̓M | | Փ | Ŀ_l | WgYԴ | վȫ | MՓľWվȫ |

line.gif (4535 ֹ)

˸õĞҷgӭӱվͶƱ{

򾺲 Ոc

վ򾺲 gӭL

ע⣺վδSDd

All rights reserved, all contents copyright 2000-2019
վ20003¿WL