Abstract
The present study includes low cycle fatigue behavior of graphite/PEEK composite materials. We conducted static tension tests to determine ultimate strength and low cycle fatigue tests using coupon specimens made from angle-ply laminates of which stacking sequence is [+30/-30]4s. Stress-strain relations are measured by an extensometer during fatigue testing for every fixed cycle in order to estimate a damage accumulation. The experimental results of stress-strain relations for every fixed cycle showed an accumulation of plastic strain, so-called ratchet type strain. The tests also indicated that fatigue failure occurred when ratchet strain reached static failure strain of about 3.9%. Moreover, we point out the difference between static failure mode and fatigue one by observing failure surface.
Original language | English |
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Pages (from-to) | 125-130 |
Number of pages | 6 |
Journal | Theoretical and Applied Mechanics |
Issue number | 46 |
Publication status | Published - Dec 1 1997 |
All Science Journal Classification (ASJC) codes
- Mechanics of Materials