NDLI: Composite hot drape forming

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Composite hot drape forming

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ott Sr., Thomas
Copyright Year	1994
Description	This program was initiated to replace labor-intensive ply-by-ply layup of composite I-beam posts and angle stiffeners used in the Space Station Freedom (SSF) rack structure. Hot drape forming (HDF) has been successfully implemented by BCAG for 777 composite I-stringers and by Bell Helicopter/Textron for the V-22 I-stingers. The two companies utilize two vastly different approaches to the I-beam fabrication process. A drape down process is used by Bell Helicopter where the compacted ply charge is placed on top of a forming mandrel and heated. When the heated ply charge reached a set temperature, vacuum pressure is applied and the plies are formed over the mandrel. The BCAG 777 process utilizes an inverted forming process where the ply stack is placed on a forming table and the mandrel is inverted and placed upon the ply stack. A heating and vacuum bladder underneath the ply stack form the play stack up onto the mandrels after reaching the temperature setpoint. Both methods have their advantages, but the drape down process was selected for SSF because it was more versatile and could be fabricated from readily available components.
File Size	320402
Page Count	7
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19940025943
Archival Resource Key	ark:/13960/t14n43v19
Language	English
Publisher Date	1994-02-01
Access Restriction	Open
Subject Keyword	Hot Working Mandrels Aircraft Construction Materials Spacecraft Construction Materials Fabrication Composite Materials Heating Vacuum Apparatus Space Station Freedom Lay-up I Beams Spacecraft Structures Composite Structures 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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