Effect of tufting on mechanical performance of co-cured co-infused carbon-epoxy composite T-joint

被引：12

作者：

Verma, Kundan K. ^{[1
]}

Viswarupachari, C. H. ^{[1
]}

Viswamurthy, S. R. ^{[1
]}

Gaddikeri, Kotresh M. ^{[1
]}

Kumar, S. ^{[2
]}

Bose, Suryasarathi ^{[2
]}

机构：

[1] CSIR Natl Aerosp Labs, Bengaluru 560017, Karnataka, India

[2] Indian Inst Sci, Dept Mat Engn, Bengaluru 560012, Karnataka, India

来源：

COMPOSITE STRUCTURES | 2020年 / 250卷

关键词：

T-joint; Stringer; Mouse-hole; Tufting; Disbond growth rate; Infusion; STRUCTURAL-PROPERTIES; DELAMINATION; FAILURE; REINFORCEMENT; ADHESIVE; STRENGTH; TENSILE; SKIN;

D O I：

10.1016/j.compstruct.2020.112468

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Structural performance of a composite T-joint is investigated to show the efficacy of tufting on the out-of-plane load bearing capability. T-joint representing portion of skin, stringer and rib construction of actual co-cured composite wing of a civil aircraft is selected for this study. Pull-off tests are performed on T-joints to capture failure strength and failure mechanism. The structural behavior of the T-joint in presence of stringer is examined in both tufted and un-tufted case. The pull-off failure load with tufting increased by around 24% compared to the un-tufted T-joints. Tufting also showed enhancement in joint toughness by 120%. Failure modes are similar for both tufted and un-tufted T-joints. Failure at interface is not sudden and progressive failure mechanism is observed in both tufted and un-tufted T-joints. Digital image correlation (DIC) technique is used for full field deformation and strain measurement on the skin. DIC results showed that tufting decreased disbond growth rate in the T-joints. Disbond growth rate was 24% slower in the tufted T-joint.

引用

页数：9

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