NDLI: Impact response of composite materials

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Impact response of composite materials

Content Provider	NASA Technical Reports Server (NTRS)
Author	Srinivasan, K. Tiwari, S. N.
Copyright Year	1991
Description	Composite materials composed of carbon fibers and resin matrices offer great promise in reducing the weight of aerospace structures. However they remain extremely vulnerable to out of plane impact loads, which lead to severe losses in strength and stiffness. The results of an experimental program, undertaken to investigate the low velocity impact damage tolerance of composite materials is presented. The objectives were to identify key neat resin/composite properties that lead to enhancement of composite impact damage tolerance and to find a small scale test that predicts compression after impact properties of panels. Five materials were selected for evaluation. These systems represented different classes of material behavior such as brittle epoxy, modified epoxies, and amorphous and semicrystalling thermoplastics. The influence of fiber properties on the impact performance was also studied in one material, i.e., in polyether ether ketone (PEEK). Several 24 and 48 ply quasi-isotropic and 24 ply orthotropic laminates were examined using an instrumented drop weight impactor. Correlations with post impact compression behavior were made.
File Size	1485773
Page Count	56
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19910007844
Archival Resource Key	ark:/13960/t6qz74v61
Language	English
Publisher Date	1991-02-01
Access Restriction	Open
Subject Keyword	Composite Materials Low Speed Brittleness Laminates Impact Loads Thermoplastic Resins Carbon Fibers Tolerances Mechanics Impact Strength Epoxy Resins Weight Reduction Impact Resistance Stiffness Aircraft Structures Impact Damage Matrix Materials Resin Matrix Composites Peek 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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