Compression Testing of Thick-Section Composite Materials
Abstract
Interest in the compressive response of fiber-reinforced composite materials has resulted in numerous research programs addressing the theoretical and experimental response of composites subjected to compressive loading. These research programs have dealt exclusively with the response of composite materials 6.4 mm (0.25 inches) in thickness and less. As composite materials become more attractive for use in large Navy structures, the need to understand the mechanical response of composites greater than 6.4 mm (0.25 inches) in thickness becomes a necessity. In this program a compression test fixture that allows the testing of composites up to one inch thickness and greater was designed and refined. This fixture was used to evaluate the effects of constituents, fiber orientation, and thickness on the compressive response of composite materials. In addition the fixture was used to determine if the failure mechanisms observed for thick composites are similar to those that have been observed and reported for composite materials less than 6.4 mm (0.25 in.) thick. The strength, stiffness, and failure characteristics of 48 ply, 96 ply and 192 ply carbon/epoxy and S2 glass/epoxy are discussed. Unidirectional and (O/O/90) style laminates have been investigated. The thickness of the 96 and 192 ply coupons allows the direct measurement of NU13 for the constituents and orientations listed above and this data is also reported.
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 01, 1989
- Accession Number
- ADA217234
Entities
People
- E. T. Camponeschi Jr.