Sandwich structures with textile-reinforced composite foldcores under impact loads

被引：170

作者：

Heimbs, S. ^{[1
]}

Cichosz, J. ^{[1
]}

Klaus, M. ^{[2
]}

Kilchert, S. ^{[3
]}

Johnson, A. F. ^{[3
]}

机构：

[1] EADS Innovat Works, D-81663 Munich, Germany

[2] Rhein Westfal TH Aachen, Dept Aerosp & Lightweight Struct, D-52062 Aachen, Germany

[3] DLR, German Aerosp Ctr, Inst Struct & Design, D-70569 Stuttgart, Germany

来源：

COMPOSITE STRUCTURES | 2010年 / 92卷 / 06期

关键词：

Sandwich structure; Composite foldcore; Cell wall failure; Low velocity impact; High velocity impact; Finite element simulation; CORE STRUCTURES; DAMAGE; WATER; MODEL;

D O I：

10.1016/j.compstruct.2009.11.001

中图分类号：

O3 [力学];

学科分类号：

070301 [无机化学];

摘要：

The mechanical behaviour of composite sandwich structures with textile-reinforced composite foldcores, which are produced by folding prepreg sheets to three-dimensional zigzag structures, is evaluated under compression, shear and impact loads. While foldcores made of woven aramid fibres are characterised by a rather ductile behaviour, carbon foldcores with their brittle nature absorb energy by crushing, showing extremely high weight-specific stiffness and strength properties. The impact damage under low and high velocity impact loads tends to be very localised. In addition to regular single-core sandwich structures, a dual-core configuration with two foldcores is also investigated, showing the potential of a two-phase energy absorption behaviour. In addition to experimental testing, finite element models for impact simulations with LS-DYNA have been developed. Despite the high degree of complexity of the models due to the various skin and core failure modes that have to be covered, the results correlate well with test data, allowing for efficient parameter studies or detailed evaluations of damage patterns and energy absorption mechanisms. (C) 2009 Elsevier Ltd. All rights reserved.

引用

页码：1485 / 1497

页数：13

共 51 条

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[2]

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[3]

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