Contrast Joints of Glass-Fibre with Carbon-Fibre Reinforced Low Density Polyethylene Composite Bonded by Microwave Irradiation

Abstract

This paper contrasts the loss tangent, durability of reinforcement and the lap shear strengths of 33 percent by weight random glass fibre reinforced polystyrene matrix composite [PS/GF (33%)] with 33 percent by weight random carbon fibre reinforced polystyrene matrix composite [PS/CF (33%)] bonded using microwave irradiation.Fixed (2.45 GHz) and variable (2 -18 GHz) frequency microwave (VFM) facilities are used to bond the two composites. With a given power level, the composites were exposed to various exposure times to microwave irradiation. The primer or coupling agent used for joining the glass-fibre-reinforced composite was 5-minute two-part adhesive, Araldite. No filler was used in joining the carbon-fibre-reinforced composite.The lap shear strengths of PS/GF (33%) obtained by FFM facility and VFMF are higher than those of PS/CF (33%). In all cases, the PS/CF (33%) absorbed too much microwave irradiation and this damaged the material (Ku et al., 2000c).

The Effect of Fiber Orientation Distribution on the Effective Permittivity of Fiber Composite Materials

“…But it is only recent that extensive studies have been carried out about the electromagnetic properties of fiber composites [5,7,8], because of the rising interest about stealth aircraft which is complemented with impedance matching layers as its skin, for example. Various methods have been proposed to estimate the effective permittivity of the fiber composite, because of its importance of determining the wave impedance of waves passing through it.…”