MECHANICAL PROPERTIES OF 3D FABRIC COMPOSITES MANUFACTURED BY MICROWAVE CURING

Abstract

Abstract: Aiming at improving the curing uniformity of microwave curing process of 3D spacer fabric composites, two different methods were proposed, i.e., additional mould for external heat-conducting and microwave absorber for internal heat-conducting. Compression test, shear test and short-beam flexural test were utilized to study the effect of material and thickness of addition mould and the kind and content of microwave absorber on the mechanical properties of spacer fabric composites. The experimental results indicate that the failure modes of compression includes the instability and crushing of core, and the failure modes of shear test are the shear failure of core and interfacial debonding, while the failure mode of short-beam flexure is the buckling after interfacial debonding. Compared with the specimens with no additional mould, the mould of AlN and Al₂O₃ could both improve the mechanical properties of the 3D spacer fabric composites, and the reinforcing effect of AlN mould is more significant. However, increasing the thickness of AlN mould is adverse to the mechanical properties. When the thickness is increased from 0.5mm to 1.5mm, the compression, shear and core shear strength were all decreased. The addition of microwave absorber could improve the mechanical properties. The shear and core shear strength increased with the increasing of graphite′s content, while the compressive strength first increased then decreased. The change of Fe₃O₄′s content didn′t affect the mechanical properties significantly.

Key words: sheet-reinforced spacer fabric composites, microwave curing, thermal conductive ceramic mold, microwave-absorber, mechanical properties

CLC Number:

TB332

YUAN Tie-jun, ZHOU Lai-shui, ZHENG Wei-feng, AN Lu-ling. MECHANICAL PROPERTIES OF 3D FABRIC COMPOSITES MANUFACTURED BY MICROWAVE CURING[J]. Fiber Reinforced Plastics/Composites, 2017, 0(3): 53-59.

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