NDLI: Size effects in impact damage of composite sandwich panels

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Size effects in impact damage of composite sandwich panels

Content Provider	NASA Technical Reports Server (NTRS)
Author	Jackson, Wade Dobyns, Alan
Copyright Year	2003
Description	Panel size has a large effect on the impact response and resultant damage level of honeycomb sandwich panels. It has been observed during impact testing that panels of the same design but different panel sizes will show large differences in damage when impacted with the same impact energy. To study this effect, a test program was conducted with instrumented impact testing of three different sizes of sandwich panels to obtain data on panel response and residual damage. In concert with the test program. a closed form analysis method was developed that incorporates the effects of damage on the impact response. This analysis method will predict both the impact response and the residual damage of a simply-supported sandwich panel impacted at any position on the panel. The damage is incorporated by the use of an experimental load-indentation curve obtained for the face-sheet/honeycomb and indentor combination under study. This curve inherently includes the damage response and can be obtained quasi-statically from a rigidly-backed specimen or a specimen with any support conditions. Good correlation has been obtained between the test data and the analysis results for the maximum force and residual indentation. The predictions can be improved by using a dynamic indentation curve. Analyses have also been done using the MSC/DYTRAN finite element code.
File Size	631266
Page Count	10
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20030012578
Archival Resource Key	ark:/13960/t7jq5xk9z
Language	English
Publisher Date	2003-01-01
Access Restriction	Open
Subject Keyword	Composite Materials Finite Element Method Panels Size Dimensions Performance Prediction Impact Velocity Impact Tests Composite Structures Sandwich Structures Impact Damage Computer Programs Loads Forces Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Technical Report

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