Mechanics & Industry
Volume 18, Number 6, 2017
|Number of page(s)||13|
|Published online||02 February 2018|
Fatigue resistance of randomly oriented short glass fiber reinforced polyester composite materials immersed in seawater environment
Civil Engineering Laboratory, Civil Engineering Department, Badji Mokhtar University,
2 Civil Engineering Department, Med Seddik Benyahia University, 18000 Jijel, Algeria
* e-mail: email@example.com
Accepted: 21 December 2016
Randomly oriented short fiber mat reinforced polyester composite laminates immersed in natural seawater for various periods were tested in static and cyclic fatigue loading under three-point bending conditions. Water absorption increased the weight of the specimen while the extraction of soluble compounds induces a weak weight loss. Wöhler curves carried out from repetitive fatigue tests were drawn for the different periods of immersion time. These curves, which are characterized by an important and a significant scatter in their lifetime, were modeled by straight lines. These glass-polyester laminates deteriorate in fatigue tests at a constant rate by cycle decade. This rate increases with increasing immersion time in seawater at a constant speed. A comparison between different mathematical models of endurance curves shows that Wöhler's equation gives a good representation of the average part of the curve.
Key words: Seawater / polyester / fatigue / Wöhler’s curve / damage
© AFM, EDP Sciences 2017
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