NDLI: Study of fatigue durability of advanced composite materials under conditions of accelerated loading

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Study of fatigue durability of advanced composite materials under conditions of accelerated loading

Content Provider	NASA Technical Reports Server (NTRS)
Author	Shih, H. M.
Copyright Year	1979
Description	The effect of temperature on the tension-tension fatigue life of the T300/5208 graphite/epoxy angle-ply laminate system was investigated in an effort to develop an acceptable and reliable method of accelerated loading. Typical S log sub 10 N curves were determined experimentally at 25 C, 75 C, and 115 C. The time-temperature superposition principle was employed to find the shift factors of uniaxial fatigue strength, and a general linear equation of S log sub 10 N for shifting purpose was established. The combined techniques of cyclic creep measurements and optical microscopy upon fatigue failure allow some assessment of the possible physical basis of S log 10 N curve shifting. Before fatigue, the laminates at all test temperatures and stress levels undergo a unique damage mechanism during fatigue loading. It is concluded that an accelerated loading method is feasible.
File Size	852852
Page Count	33
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19820025560
Archival Resource Key	ark:/13960/t2798zz18
Language	English
Publisher Date	1979-10-01
Access Restriction	Open
Subject Keyword	Composite Materials Fatigue Tests Fatigue Life Accelerated Life Tests Temperature Effects Temperature Gradients Cyclic Loads Tensile Tests Graphite-epoxy Composites Optical Microscopes Laminates 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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