Comparison of Notch Strength between Gr/PEEK (APC-1 and APC-2) and Gr/Epoxy Composite Materials at Elevated Temperature.
Abstract
Thermoplastics have been developed to improve fracture toughness compared to the widely used thermosetting polymers such as epoxy systems. A semi-crystalline thermoplastic, poly-ether-ether-ketone(PEEK), matrix has been developed with significant toughness improvement over thermosets. A review of literature resulted in very little information related to the Aromatic Polymer Composite-2 (APC-2) which is formed from graphite fibers (60% volume) and PEEK. The experimental study reported herein was conducted to investigate the high temperature strength (tension and compression) of APC-2 laminates with holes. The experimental data was then used to determine parameters necessary to predict failure stress trends for the average stress failure criterion, point stress failure criterion, and a three parameter model failure criterion. The comparison of experimental and predicted failure strengths are depicted graphically. The failure modes of APC-2 are also studied utilizing the scanning electron microscope.
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1985
- Accession Number
- ADA164033
Entities
People
- Joe E. Ramey Jr
Organizations
- Air Force Institute of Technology