Fatigue Behavior of Short Glass Fiber Reinforced Polyamide 66: Experimental Study and Fatigue Damage Modelling

  • Elouni Chebbi Mechanical Modelisation and Manufacturing Laboratory (LA2MP), National Engineering School of Sfax, B.P W3038, Sfax, University of Sfax, Tunisia
  • Jamel Mars Mechanical Modelisation and Manufacturing Laboratory (LA2MP), National Engineering School of Sfax, B.P W3038, Sfax, University of Sfax, Tunisia
  • Mondher Wali Mechanical Modelisation and Manufacturing Laboratory (LA2MP), National Engineering School of Sfax, B.P W3038, Sfax, University of Sfax, Tunisia
  • Fakhreddine Dammak Mechanical Modelisation and Manufacturing Laboratory (LA2MP), National Engineering School of Sfax, B.P W3038, Sfax, University of Sfax, Tunisia

Abstract

The aim of the present paper is to study and model the fatigue behavior of short glass fibers reinforced polyamide-66. The effect of fiber content on the fatigue and static behavior of this composite is investigated. In such composites fatigue damage growth exhibits three stages. A continuum damage based model is presented to predict damage evolution during these three stages. Experimental results show that increasing the fiber content increases the elastic modulus and the tensile strength of the studied materials under tensile tests. However, the rupture behavior changes from ductile to brittle. Moreover increasing the fiber percentage changes the S-N curves slope and decreases the fatigue life. Analytical results predicted by the proposed model, compared to experimental ones shows good agreement and the developed model predicted fatigue damage growth in its three stages of evolution with good performance.
Keywords: fatigue damage, glass fiber, Polyamide 66
Published online
2016-09-19
How to Cite
Chebbi, E., Mars, J., Wali, M. and Dammak, F. (2016) “Fatigue Behavior of Short Glass Fiber Reinforced Polyamide 66: Experimental Study and Fatigue Damage Modelling”, Periodica Polytechnica Mechanical Engineering, 60(4), pp. 247-255. https://doi.org/10.3311/PPme.9054.
Section
Articles