碳纤维复合材料层间剪切破坏机理

Research on the Mechanism of Interface Fracture In CarbonFiber Reinforced Composites

本文研究了碳纤维经不同气氛冷等离子体处理后,其复合材料层间剪切强度的变化情况.并通过对处理前、后的高强碳纤维进行ESCA、Roman、TG、DTA 分析,提出了树脂基碳纤维复合材料的层间剪切破坏主要是发生在抗剪能力较弱的碳纤维表面层中.等氧离子体(O_2-PLasma)处理通过改变碳纤维的表面层结构,提高了表面层的抗剪能力.因此,其复合材料的层间剪切强度(ILSS)得到了大幅度提高.

In this paper,the variation of the ILSS(Interlaminar Shearing Strength)of thecomposites reinforced by carbon fiber is studied,the surface of which was treated indifferent atmosphere of cold plasma.On the basis OI the ESLA,TG,DTA,and LaserRoman spectrum analyses,before and after treatment,a finding is presented that theinterface Fracture of a composite reinforced by carbon fiber was found mainly in theweak furface layer of the carbon fiber.But when the fiber surface was treated byO2-plasma,the resistance of the fiber surface to shearing stress was raised,and thevalue of ILSS of the composite was greatly increased.