EFFECT OF CURING PROCESS PARAMETERS ON THE PROPERTIES OF HIGH TOUGHNESS COMPOSITES REINFORCED BY DOMESTIC T800 CARBON FIBER

Abstract

Abstract: The viscosity and flow characteristics of AC531/CCF800H high toughness composites under 0.2 MPa+vacuum (-0.07 MPa) conditions were analyzed by the rheological instrument method. During the curing process of AC531/CCF800H preform, the flow of AC531 resin between fibre layers can be described by Darcy's theorem. According to the Darcy theorem, the porosity in the AC531/CCF800H composite decreases with the increase of the curing pressure. The results of the impregnation experiment show that there is a linear relationship between the porosity and the porosity. The results of A scanning for fabric and unidirectional tape replacement showed that AC531/CCF800H composites were mainly in-plane flow during curing. According to the test results of the internal and mechanical properties of AC531/CCF800H composites under different curing pressure, it is found that the effective curing pressure is the key factor affecting the internal quality of AC531/CCF800H composites. The effective curing pressure should be at least 0.3 MPa, and the continuous increase of pressure has weak effect on the mechanical properties at normal temperature, but it can reduce the internal porosity and reduce the single layer compression thickness of the parts.

Key words: high toughness composites, high-strength medium modulus carbon fiber, curing process, mechanical properties

CLC Number:

TB332

LI Wei, ZHANG Chen-qian, YE Hong-jun, BAO Jian-wen. EFFECT OF CURING PROCESS PARAMETERS ON THE PROPERTIES OF HIGH TOUGHNESS COMPOSITES REINFORCED BY DOMESTIC T800 CARBON FIBER[J]. Composites Science and Engineering, 2020, 0(6): 98-104.

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