Manufacturing Technology Today

J. Sudha ¹, S. Sampathkumar ¹, A. Vijaya ¹

Affiliations
1 Dept. of Production Technology, MIT, Anna University, Chennai, IN

Abstract

The present study aims to apply AE in the drilling of GFRP laminates and understand the different events that occur from the time the drill come in contact with the surface to the time when the process is complete for various spindle speeds. Experiments were carried out under varying speeds on random fiber GFRP. The results clearly indicate that AE parameters as well as AE waveform can be used to identify the optimum cutting condition on drilling random oriented glass fiber reinforced composite laminate and also can be used for monitoring the drilling process.

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J. Sudha ¹, S. Sampathkumar ¹, N. Raghavendra ¹

Affiliations
1 Dept. of Production Technology, MIT, Anna University, IN

Abstract

Composite materials are most widely used in aerospace, automobile and marine industries owing to their properties such as their strength to weight ratio is very high and also they possess high stiffness. The machining of composite material is different from conventional machining of metals due to anisotropic and non-homogeneous nature. Drilling is one of the machining operations required to produce holes in the materials. Damages caused during drilling of composite materials are one of the prime factors to look into. The most widely found drilling related defect in composite materials is delamination. This work deals with conducting experiments on the GFRP material by using Ultrasonic testing and evaluation of delamination defect. A and C-scans are used for the study of delamination. It was observed that the amplitude of the Ultrasonic wave reflected the drilling related delamination.

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