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

Aminanda, Yulfian and Castanie, Bruno and Barrau, Jean-Jacques and Thevenet, Pascal (2009) Experimental and numerical study of compression after impact of sandwichs structures with metallic skins. Composites Science and Technology, 69 (1). pp. 50-59. ISSN 0266-3538

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Abstract

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.

Item Type:	Article (Journal)
Additional Information:	5168/6275
Uncontrolled Keywords:	B. Impact behavior modeling; C. Sandwich
Subjects:	T Technology > TA Engineering (General). Civil engineering (General) > TA349 Mechanics of engineering. Applied mechanics T Technology > TA Engineering (General). Civil engineering (General) > TA401 Materials of engineering and construction
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Engineering > Department of Mechanical Engineering
Depositing User:	Prof Dr Ing yulfian aminanda
Date Deposited:	11 Nov 2011 08:47
Last Modified:	22 Nov 2011 04:06
URI:	http://irep.iium.edu.my/id/eprint/6275

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