Numerical simulations and testing of notched composite plates under envelope loadings: Validation with the safe life domain method

被引：1

作者：

Grotto, Florent ^{[1
]}

Bouvet, Christophe ^{[1
]}

Castanie, Bruno ^{[1
]}

Serra, Joel ^{[1
]}

机构：

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

来源：

COMPOSITE STRUCTURES | 2024年 / 340卷

关键词：

Combined loading; Structural testing; Failure envelope; CFRP; Notch; Post-buckling; Path-dependency; PANELS; LAMINATE; SHEAR;

D O I：

10.1016/j.compstruct.2024.118191

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The certification of aircraft structures specifies various loads, possibly combined, to be considered to demonstrate its strength. In general, structural testing up to static failure is performed using proportional loading. In this study, the effects of loading with combinations of tension-shear-pressure are studied on large notched composite specimens. The VERTEX test rig is used. The Safe Life Domain method is proposed to validate whole domains of loading combination by means of a single envelope test. Envelope validation tests are implemented on tensionshear loadings with and without pressure, based on numerical predictions of the specimen failure and of the bench behaviour. Buckling mode variability and its impact on failure is considered, to show possible pathdependency of failure and thus highlight an ignored complexity of structure failure. Therefore, the numerous proportional tests needed for compliance demonstration can be reduced thanks to a few envelope tests instead.

引用

页数：14

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