NDLI: Effects of substrate deformation and sip thickness on tile/sip interface stresses for shuttle thermal protection

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Effects of substrate deformation and sip thickness on tile/sip interface stresses for shuttle thermal protection

Content Provider	NASA Technical Reports Server (NTRS)
Author	Garcia, R. Shore, C. P.
Copyright Year	1980
Description	A nonlinear analysis was used to study the effects of substrate deformation characteristics and strain isolator pad (SIP) thickness on TILE/SIP interface stresses for the space shuttle thermal protection system. The configuration analyzed consisted of a 5.08 cm thick, 15.24 cm square tile with a 12.7 cm square SIP footprint bordered by a 1.27 cm wide filler bar and was subjected to forces and moments representative of a 20.7 kPa aerodynamic shock passing over the tile. The SIP stress deflection curves were obtained after a 69 kPa proof load and 100 cycles conditioning at 55 kPa. The TILE/SIP interface stresses increase over flat substrate values for zero to peak substrate deformation amplitudes up to 0.191 cm by up to a factor of nearly five depending on deformation amplitude, half wave length, and location. Stresses for a 0.23 cm thick SIP found to be up to 60 percent greater than for a 0.41 cm thick SIP for identical loads and substrate deformation characteristics. A simplified method was developed for approximating the substrate location which produces maximum TILE/SIP interface stresses.
File Size	655417
Page Count	26
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19800021267
Archival Resource Key	ark:/13960/t7rn7zs2m
Language	English
Publisher Date	1980-07-01
Access Restriction	Open
Subject Keyword	Structural Mechanics Stress Analysis Thermal Protection Deformation Tiles Space Shuttles Interfacial Tension Nonlinearity Buckling Aerodynamic Loads 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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