A Test Technique to Study Interlaminar Shear Phenomena of Laminated Composites.
Abstract
The objective of the program was to develop a test method and a configuration for the determination of the interlaminar shear strength of fibrous composites. The slip plane shear interlaminar test technique was selected over several existing test methods as the most promising technique to measure and characterize the interlaminar shear strength of laminated composites. This test method was utilized to evaluate four basic laminates and a quasiisotropic laminate made of boron/NARMCO 5505 prepreg. The basic laminates evaluated were 0, 90, 0/90, and plus or minus 45. The interlaminar shear strength of the plus or minus 45 laminate was one-third less than that of the 0 laminate. This apparent decrease in strength is believed due to residual stresses resulting from the lamination process and fiber orientation effects. Evaluation of data on the quasi-isotropic laminate indicated that the interlaminar shear strength of a combination laminate could not be directly predicted from the basic laminate data. A series of tests were conducted on the basic laminates without scrim cloth to determine the effect of the scrim cloth on interlaminate shear strength. Test data showed no effect for 0 laminates, and a 10-15 percent increase in interlaminar shear strength for 0/90 and plus or minus 45 laminates containing scrim cloth. (Author, modified-PL)
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1971
- Accession Number
- AD0729872
Entities
People
- James E. Bell
- Ronald F. Zabora
Organizations
- Boeing