Creep of PEEK-graphite fibre composite material
Abstract
The thermoplastic matrix composites are a relatively new class of materials and their mechanical properties have not yet been fully characterized. Therefore, a study was initiated to determine the high temperature creep behavior of polyether ether ketone (PEEK) matrix-graphite fiber composites, one of the new thermoplastic matrix composites. The samples were tested in the longitudinal direction (direction of maximum strength) using 3-point bending with a span length of 2.5 inches. Tests were conducted at 8 temperatures from 20 C to 220 C. Creep tests were conducted for period of time ranging from a few hours to a few days. The Larson-Miller parameter method shows some promise for predicting long term creep behavior of PEEK-graphite fiber composite material. Creep failure occurs suddenly after very small creep deformations of only 0.01-0.04 percent at high temperatures and is, therefore, quite insidious in nature since imminent failure is most difficult to detect.
- Publication:
-
13th Canadian Congress of Applied Mechanics
- Pub Date:
- May 1991
- Bibcode:
- 1991ccam.proc..198E
- Keywords:
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- Carbon Fiber Reinforced Plastics;
- Creep Properties;
- Creep Rupture Strength;
- Peek;
- Temperature Effects;
- Creep Tests;
- Fractures (Materials);
- Performance Prediction;
- Structural Mechanics