Experimental and numerical study of compression after impact of sandwich structures with metallic skins

被引:38
作者
Aminanda, Y. [2 ]
Castanie, B. [1 ]
Barrau, J. -J. [3 ]
Thevenet, P. [4 ]
机构
[1] Supaero, Lab Struct, IGMT, F-31055 Toulouse, France
[2] Dept IIUM, Kuala Lumpur 50728, Malaysia
[3] Univ Toulouse 3, IGMT, F-31062 Toulouse, France
[4] EADS CRC, F-92152 Suresnes, France
关键词
Impact behavior modeling; Sandwich;
D O I
10.1016/j.compscitech.2007.10.045
中图分类号
TB33 [复合材料];
学科分类号
摘要
A finite element model is proposed to determine the residual print of sandwich structures with Nomex honeycomb core and metallic skins indented by a spherical indenter and to simulate its behavior when this indented structure is subjected to lateral compressive loading (known as CAI/ Compression after impact). The particularities of this model rely on representing the honeycomb with a grid of nonlinear springs which its behavior law calibrated from uniform compression test. This simple model, after integrating the cycle behavior law of honeycomb, allows predicting the geometry of residual print with a good precision. This model is then developed to propose a complete computation from indentation, residual print geometry to lateral compressive loading after indentation (CAI). This model also allows predicting numerically the residual strength of structure in CAI and the elliptical evolution of residual print geometry during CAI loading. A good correlation with test results is obtained except for the very small residual print depth. (C) 2007 Elsevier Ltd. All rights reserved.
引用
收藏
页码:50 / 59
页数:10
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