The Effect of Prepeg Storage Humidity on Co-cured Composite Joints

Files in This Item:
File Description SizeFormat 
082.pdf168.55 kBAdobe PDFDownload
Title: The Effect of Prepeg Storage Humidity on Co-cured Composite Joints
Authors: Mohan, Joseph
Murphy, Neal
Ivankovic, Alojz
Permanent link: http://hdl.handle.net/10197/4761
Date: 2009
Abstract: The increasing use of composite materials in the aerospace industry has driven a need for a greater understanding of bonded composite joints. There are generally two types of composite joint used in the aerospace industry; secondary bonded joints and cocured joints. Secondary bonded joints are produced by bonding two cured composite laminates together with an adhesive. However, when composites and adhesives are used to manufacture large parts in the aerospace industry, it is often convenient to co-cure the two materials at the same time. This helps to reduce the high costs associated with autoclave curing and also to reduce processing time. However, despite the apparent advantages, co-curing is not without its drawbacks. Any moisture stored in the composite material prior to co-curing is released during the cure cycle and has a negative effect on the joint. This can also result in interfacial failure. A way around this problem is to either dry the composite material prior to curing or to engineer the composite surface using a variety of surface treatments to promote adhesion, such as an atmospheric pressure plasma treatment [1]. The former option will be investigated in this work. The effects of moisture on the fracture performance of secondary bonded composite joints is well publicised. Moisture can be introduced into the composite laminate prior to [2] or after [3] secondary bonding. The moisture can plasticize the adhesive and reduce the glass transition temperature of the adhesive [4]. However, compared to secondary bonded joints, relatively little work has been carried out on co-cured joints. In the present work, the effect of the level of moisture in the composite prepreg prior to co-curing will be examined.
Type of material: Conference Publication
Publisher: Adhesion Society
Copyright (published version): 2009 the authors
Keywords: Prepeg storage humidity;Co-cured composite joints
Language: en
Status of Item: Peer reviewed
Conference Details: 32nd Annual Meeting of the Adhesion Society, Savannah, Georgia, 15-18 February 2009
Appears in Collections:Mechanical & Materials Engineering Research Collection

Show full item record

Page view(s) 50

63
checked on May 25, 2018

Download(s) 50

99
checked on May 25, 2018

Google ScholarTM

Check


This item is available under the Attribution-NonCommercial-NoDerivs 3.0 Ireland. No item may be reproduced for commercial purposes. For other possible restrictions on use please refer to the publisher's URL where this is made available, or to notes contained in the item itself. Other terms may apply.