High performance quasi -isotropic thin -ply carbon/glass hybrid composites with pseudo -ductile behaviour loaded off -axis

被引：25
作者：
Fotouhi, Mohamad [1 ]
Jalalvand, Meisam [2 ]
Saeedifar, Milad [3 ]
Xiao, Bill [4 ]
Wisnom, Michael R. [4 ]
机构：
[1] Univ West England, Dept Design & Math, Bristol BS16 1QY, Avon, England
[2] Univ Strathclyde, Dept Mech & Aerosp Engn, 75 Montrose St, Glasgow G1 1XJ, Lanark, Scotland
[3] Delft Univ Technol, Fac Aerosp Engn, Struct Integr & Composites Grp, Delft, Netherlands
[4] Univ Bristol, Bristol Composites Inst ACCIS, Bristol BS8 1TR, Avon, England
来源：
COMPOSITE STRUCTURES | 2020年 / 247卷
基金：
英国工程与自然科学研究理事会;
关键词：
Pseudo-ductility; Hybrid composites; Off-axis; Fragmentation; Acoustic emission; ACOUSTIC-EMISSION; DAMAGE; IMPACT; FRAGMENTATION; HYBRIDIZATION; FAILURE;
D O I：
10.1016/j.compstruct.2020.112444
中图分类号：
O3 [力学];
学科分类号：
08 ; 0801 ;
摘要：
The aim of this work was to investigate the effect of loading angle variation on the pseudo -ductility of quasi - isotropic (QI) hybrid composite laminates. Previously, hybrids of thin -ply carbon fibres and standard glass fibres were found to have an excellent pseudo -ductile behaviour both in unidirectional (UD) and QI configurations when subjected to axial tension in the fibres? orientations. In this work, the QI laminates, with 60? intervals, have been subjected to a quasi -static tensile load at various off -axis orientations - i.e. 5?, 10? and 20?. The QI hybrid composites were made by sandwiching a QI T300 -carbon laminate between the two halves of a QI S -glass laminate. The results showed a pseudo -ductile behaviour with a linear elastic part and a desirable plateau for all the loading directions, however the pseudo -ductile strain decreases when increasing the off -axis angle. Comparing the 20? off -axis with the other cases, there was more active matrix cracking damage before frag- mentation in the 20? off -axis plies and it failed earlier than the other samples. Acoustic emission (AE) results confirmed this, with more matrix cracking related AE signals in the 20? off -axis case compared to the other configurations.
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页数：9
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