Fatigue Testing of GFRP

Glass fiber-reinforced plastics (GFRP) are ultra-strong composite materials with excellent thermal and electrical insulation properties. They have been rapidly adopted in automobiles, OA equipment, and consumer electronics. The automobile field demands the development of GFRP materials with superior functionality (properties), with emphasis on shock resistance and fatigue strength. The fatigue testing of a GFRP composite material comprising 20% glass fiber in polyamide resin is introduced below. Static tensile testing was performed to determine the load conditions. Six cyclic stress levels were determined based on the tensile strength value (96 MPa) obtained from the static tensile tests. The stress ratio (minimum stress/maximum stress) of the cyclic loads was set to zero. (For example, Level 1 is 77 MPa maximum stress, 0 MPa minimum stress, 38.5 MPa stress amplitude.)

Cyclic maximum stresses
Level 1: 77 MPa (80% tensile strength)
Level 2: 67 MPa (70% tensile strength)
Level 3: 58 MPa (60% tensile strength)
Level 4: 48 MPa (50% tensile strength)
Level 5: 43 MPa (45% tensile strength)
Level 6: 38 MPa (40% tensile strength)

Fatigue Testing of GFRP
Fatigue Testing of GFRP

Fatigue Testing Machine (Servopulser)

Fatigue Testing of GFRP

This is a multifunctional materials testing machine featuring revolutionary digital servocontrol that pioneers the way to the next generation of fatigue testing systems. The fully digital control incorporates leading-edge technologies to achieve superb accuracy, reliability, and expandability.

For Research Use Only. Not for use in diagnostic procedures.

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