Accession Number : AD0718868
Title : The Fracture Energy of Composite Materials.
Descriptive Note : Final rept. 1 Sept 69-31 Aug 70,
Corporate Author : VERMONT UNIV BURLINGTON
Personal Author(s) : Outwater,John O. ; Murphy,Michael C.
Report Date : 01 FEB 1971
Pagination or Media Count : 19
Abstract : The double torsion technique was employed to determine the fatigue behaviorof epoxy resin as it characteristically produces stable crack movement inbrittle materials. Preliminary results indicate the existence of an endurancelimit which is approximately 60% of the fracture load. During fatigue testing,there was a 12% increase in both the shear modulus and Young's modulus. Thefracture load also increased about 12%. These two effects may be due to astress induced cross-linking. (Author, modified-PL)
Descriptors : (*EPOXY RESINS, FATIGUE(MECHANICS)), REINFORCED PLASTICS, FRACTURE(MECHANICS), LOADS(FORCES), TORSION, CRACK PROPAGATION
Subject Categories : Laminates and Composite Materials
Distribution Statement : APPROVED FOR PUBLIC RELEASE