Effect of milled notches on the strength of open hole, filled holes, single and double lap shear CFRP tension coupons

被引：5

作者：

Castanie, Bruno ^{[1
]}

Achard, Victor ^{[2
]}

Chirol, Clement ^{[2
]}

机构：

[1] Univ Toulouse, Inst Clement Ader ICA, CNRS UMR INSA ISAE SUPAERO Mines Albi UPS 5312, Toulouse, France

[2] Airbus Operat SAS, 316 Route Bayonne, F-31060 Toulouse 9, France

来源：

COMPOSITE STRUCTURES | 2020年 / 254卷

关键词：

Laminates; Notches; Open hole tests; Filled Hole tests; Single lap shear tests; CFRP coupons; CROSS-PLY; RESIDUAL PROPERTIES; DAMAGE DEVELOPMENT; COMBINED LOADINGS; FATIGUE; COMPOSITES; VALIDATION; MECHANISMS; LAMINATE; PANELS;

D O I：

10.1016/j.compstruct.2020.112872

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

Splitting is the presence of a long, thin matrix crack observed in laminates stacked with unidirectional plies. The importance of splitting has been highlighted several times in the literature to explain failure scenarios of open and, more rarely, filled hole CFRP coupon specimens. This failure mode also seems to play an important role in the increase of residual strength after fatigue that is sometimes observed in such specimens. In this study, a machining process is used to mill notches at the boundary of holes for open and filled holes, and for single and double lap shear specimens. These notches mimics the effects of splitting and a significant increase of the quasi-static tensile strength (up to + 20%) is observed in open/ filled hole coupons and for double lap shear specimens. However, for single lap-shear specimens, the results are within the dispersion of the experimental results or lower.

引用

页数：9

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