Quasi-static and dynamic progressive crushing of CF/EP composite sandwich panels under in-plane localised compressive loads

被引：13

作者：

Chen, Yuan ^{[1
]}

Ye, Lin ^{[1
]}

Escobedo-Diaz, Juan Pablo ^{[2
]}

Zhang, Yi-Xia ^{[2
]}

Fu, Kunkun ^{[3
]}

机构：

[1] Univ Sydney, Sch Aerosp Mech & Mechatron Engn, CAMT, Sydney, NSW 2006, Australia

[2] Univ New South Wales, Sch Engn & Informat Technol, Canberra, ACT 2600, Australia

[3] Tongji Univ, Sch Aerosp Engn & Appl Mech, Shanghai 200092, Peoples R China

来源：

COMPOSITE STRUCTURES | 2019年 / 222卷

关键词：

Composite sandwich panels; In-plane localised crushing; Debris wedge; Progressive failure mechanism; VELOCITY IMPACT RESPONSE; INCREASED ENERGY-ABSORPTION; FAILURE; DAMAGE; BEHAVIOR; GEOMETRY;

D O I：

10.1016/j.compstruct.2019.04.011

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This study investigates the in-plane localised crushing responses and progressive damage mechanisms of CF/EP composite sandwich panels under both quasi-static and dynamic loadings. The effect of the indenter shape on the damage mechanisms of the CF/EP composite sandwich panels under both quasi-static and dynamic in-plane localised crushing were investigated. It was found that the specimens were prone to lamina bending under quasi-static compression irrespective of indenter shapes, whilst the specimens failed mostly with fronds fracturing with different extents of transverse shearing under dynamic crushing. The specific energy absorptions of the CF/EP composite sandwich panels under dynamic impact are 20% lower than those under quasi-static compression. An energy balance model was adopted to analyse failure mechanisms and energy dissipation. To the model, the geometry of the debris wedge was predicted using an inverse calculation with experimental validation. The results show that the crush energy is mainly consumed by friction work and bending at about 55% and 35%, respectively.

引用

页数：11

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