The impact response of a Nomex? honeycomb core/E-glass/epoxy composite sandwich structure to increasing velocities: Experimental and numerical analysis

Celik M.; Guden M.; Sarikaya M.Tasdemirci A.Genc C.Ersoy K.Serin O.

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The impact response of a Nomex? honeycomb core/E-glass/epoxy composite sandwich structure to increasing velocities: Experimental and numerical analysis

机译：The impact response of a Nomex? honeycomb core/E-glass/epoxy composite sandwich structure to increasing velocities: Experimental and numerical analysis

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? 2023 Elsevier LtdThe impact response of an E-glass fiber reinforced epoxy/Nomex? honeycomb core sandwich was investigated both experimentally and numerically at increasing velocities through concentrated quasi-static indentation force (CQIF), low velocity impact (LVI) and high velocity impact (HVI) tests. The composite face sheets and core were modelled using MAT_162 and MAT_026 homogenized material model in LS-DYNA, respectively. The experimental and numerical LVI test forces corresponding to core crushing and face sheet penetration were shown to be higher than those of the CQIF tests and increased as the impactor velocity increased. The increase of the impact forces at increasing velocities was largely ascribed to the inertia and the strain rate sensitive fracture strength of the composite sheets. The core shearing was detected in the CQIF and LVI tests both experimentally and numerically. It was also detected in the HVI tests at the velocities less than 20 m s?1. The deformation in the HVI tests at and above ～ 29.4 m s?1 was highly localized in the impact area with no core shearing and a large delamination damage area at the front face sheet. The force enhancement due to the micro-inertia of the core deformation was shown to be not significant at the studied velocities.

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《Composite structures》 |2023年第9期|1.1-1.19|共19页
作者
Celik M.; Guden M.; Sarikaya M.Tasdemirci A.Genc C.Ersoy K.Serin O.;
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作者单位

Dynamic Testing and Modeling Laboratory and Department of Mechanical Engineering Izmir Institute of Technology Section of Materials Technology;

Aircraft Integration Engineering Department Structural Analysis and Testing Division REH?S-ASELSAN A.?;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);
原文格式 PDF
正文语种英语
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关键词
E-glass fiber/epoxy composite; High velocity impact; Impact resistance; Low velocity impact; MAT_162 LS-DYNA; Modelling;

The impact response of a Nomex? honeycomb core/E-glass/epoxy composite sandwich structure to increasing velocities: Experimental and numerical analysis

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