INFLUENCE OF CONFINEMENT STRUCTURE ON PROPERTIES OF CONTINUOUS GLASS FIBER REINFORCED POLYURETHANE COMPOSITE LEAF SPRINGS

Abstract

Abstract: In order to improve the mechanical properties of continuous glass fiber reinforced polyurethane (GF/PUR) composites as elastomers, the composite leaf springs with circumferential winding glass fiber yarn, glass fiber cloth, glass fiber bushing and two layers of glass fiber bushing were prepared by vacuum resin introduction molding process. The bending modulus, bending strength, fatigue property and damping property were studied. The results show that the restrained structure can reduce the bending modulus and strength of the composite spring to some extent, but its fatigue and damping properties are improved obviously. Among them, when the fiber cloth belt is used as the confinement structure, the composite leaf spring has better comprehensive performance, the bending modulus is 26201.16 MPa, the bending strength is 443.12 MPa, the cycle times of 40% stress level is 2109, and the natural frequency and loss factor are 215 Hz and 0.071, respectively.

Key words: GF/PUR composite, glass fiber, confinement structure, mechanical properties

CLC Number:

TB332

LI Bo, ZHANG Min-ai, YANG Jian, WANG Jun. INFLUENCE OF CONFINEMENT STRUCTURE ON PROPERTIES OF CONTINUOUS GLASS FIBER REINFORCED POLYURETHANE COMPOSITE LEAF SPRINGS[J]. Composites Science and Engineering, 2020, 0(10): 82-87.

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