The importance of material structure in the laser cutting of glass fiber reinforced plastic composites

Article Abstract:

Theoretical and experimental studies enable the evaluation of a micromechanical formula developed for predicting the vaporization energy of composite materials in terms of matrix properties, fiber properties and fiber volume ratio. Experimental results on glass fiber reinforced plastic panels with a CO2 laser cut-structure agree well with theoretical vaporization energy values. Theoretical predictions of the material response to laser cutting suggest that description of the experimental data under varying fiber content results in errors in the determination of thermal properties of the material.

Analysis, Micromechanics, Micromechanics (Engineering), Laser beam cutting, Laser cutting

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Prediction of extent of heat affected zone in laser grooving of unidirectional fiber-reinforced plastics

Article Abstract:

An analytical and numerical heat conductivity model was developed for predicting the extent of the formation of the heat affected zone (HAZ) in unidirectional fiber-reinforced plastics induced by laser grooving. Results obtained from the model show that the smallest HAZ is generated by a grooving parallel to fiber orientation, while the largest HAZ is produced by a grooving perpendicular to fiber orientation. The simulation results were also found in good correlation with experimental results.

Materials, Thermal properties, Reinforced plastics, Thermal stresses

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Cutting forces in orthogonal cutting of unidirectional GFRP composites

Article Abstract:

Orthogonal cutting tests on unidirectional glass fiber reinforced plastic composites show that the horizontal force/unit width significantly decreases with increasing tool rake angle. The force is almost unaffected by the relief angle and increases linearly with the depth of cut (t). The vertical force/unit width significantly decreases with increasing relief angle and rake angle. The vertical force varies linearly with t.

Observations, Cutting, Glass reinforced plastics

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