Effect of hygrothermal aging on mechanical and tribological behaviors of short glass-fiber-reinforced PA66

Mechanical and tribological behaviors of polyamide 66 reinforced by various weight fractions of short glass fiber were investigated. All studied materials were subjected to accelerated hygrothermal aging tests. Three-point bending flexural tests were carried out to determine the mechanical behavior. Reciprocating tribotester was employed to determine friction and wear behaviors. Tribological tests were carried out, without lubrication and under ambient conditions. Ball on flat contact configuration was adopted for friction tests. Wear tests were carried out against an abrasive counterface. Results showed that flexural strength and elastic modulus increased when increasing glass fiber rate for all tested materials. In the contrary, the coefficient of friction and the wear resistance decreased. Results showed that the hygrothermal aging decreased the flexural features and increased the coefficient of friction. The effect of hygrothermal aging on the wear resistance depends on the reinforcement rate.

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Effect of thermal aging on mechanical and tribological behaviors of short glass fiber–reinforced PA66

Journal of Thermoplastic Composite Materials ◽

10.1177/0892705718807961 ◽

2018 ◽

Vol 33 (4) ◽

pp. 501-515

Author(s):

R Autay ◽

A Njeh ◽

F Dammak

Keyword(s):

Wear Resistance ◽

Glass Fiber ◽

Coefficient Of Friction ◽

Thermal Aging ◽

Friction And Wear ◽

Reinforcement Rate ◽

Ambient Conditions ◽

Tribological Behaviors ◽

Short Glass Fiber ◽

Short Glass

The use of polyamide (PA) composites in a variety of thermal conditions can enormously affect their durability that is a very important issue for designers and users. In this study, mechanical and tribological behaviors of PA66 reinforced by various weight fractions of short glass fiber were investigated. All studied materials were subjected to accelerated thermal aging tests. Three-point bending flexural tests were carried out to determine the mechanical behavior. Reciprocating tribotester was employed to determine friction and wear behaviors. Tribological tests were carried out without lubrication and under ambient conditions. Ball on flat contact configuration was adopted for friction tests. Wear tests were carried out against an abrasive counterface. Results showed that flexural strength and elastic modulus increased when increasing glass fiber rate for all tested materials. In the contrary, coefficient of friction and wear resistance decreased. Results showed that the thermal aging increased the flexural features and reduced the coefficient of friction. The effect of thermal aging on the wear resistance depends on the reinforcement rate.

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Mechanical and tribological study of short glass fiber-reinforced PA 66

Polymers and Polymer Composites ◽

10.1177/0967391119853956 ◽

2019 ◽

Vol 27 (9) ◽

pp. 587-596 ◽

Cited By ~ 1

Author(s):

R Autay ◽

S Missaoui ◽

J Mars ◽

F Dammak

Keyword(s):

Glass Fiber ◽

Coefficient Of Friction ◽

Weight Fraction ◽

Tensile Tests ◽

Fiber Direction ◽

Scanning Electron Micrographs ◽

Ambient Conditions ◽

Friction Behavior ◽

The Coefficient Of Friction ◽

Short Glass

Tensile, flexural, wear, and friction behaviors of polyamide 6.6 (PA 66) reinforced by different weight fractions of short glass- iber were investigated. Three-point bending flexural tests in addition to monotonic tensile tests were carried out to determine the mechanical behavior. Reciprocating friction tests were carried out without lubrication under ambient conditions. A ball-on-flat contact configuration was adopted for all tests. Reciprocating wear tests were carried out against a silicon carbide abrasive paper. Results show that the reinforcement influenced mechanical and tribological behaviors and that the orientation of glass fiber has an effect on the friction behavior. Increasing the weight fraction of glass fiber increases the ultimate strength, the flexural strength, and the elastic modulus but decreases the elongation at break. Increasing the weight fraction of glass fiber decreases the coefficient of friction and increases the wear rate. For high weight fractions, when sliding parallel to the glass fiber direction, the coefficient of friction is smaller than which is measured in the perpendicular direction. Abrasive wear mechanism of wear was illustrated via scanning electron micrographs.

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