Abstract
The bonding of Carbon Fibre Reinforced ThermoPlastic composites (CFRTP) and steel is of great interest nowadays. Nevertheless, the difference in machinability between dissimilar materials requires a specific machining process. Abrasive water jet machining is a flexible and environmentally friendly technology that can machine dissimilar materials at the same time with good results. However, due to the characteristics of the process and materials, geometrical defects such as taper angle can be caused by the loss of kinetic energy.In this research, the study of the final geometry in abrasive waterjet machining of a hybrid CFRTP/Steel structure. A new methodology for the evaluation of taper angle with high accuracy has been developed through image processing. In addition, the surface quality in terms of Ra and Rz has been assessed. A potential-type trend between taper and hydraulic pressure has been established for both materials. Minimum taper values between 1.5° and 5° have been obtained for both materials and stacking configurations with a combination of a hydraulic pressure of 420 MPa, an abrasive mass flow of 225 g/min and a traverse speed of 50 mm/min.
Highlights
The final geometrical quality after each machining test is presented
In order to study the influence of mate rials, the results have been compared for the same combination of shear parameters in both stacking configurations
This allows to establish the dominant material in the hybrid structure for this machining process
Summary
An interesting type of ma terial is the Carbon fibre Reinforced ThermoPlastic polymer matrix composites, CFRTP. These materials, like thermoset composites (CFRP, Carbon fibre Reinforced Polymers), achieve an excellent mechanical properties/weight ratio [1,2]. Jiao et al and highlight their ability to be bonded to other dissimilar materials by laser bonding [1]. Berger et al highlights the properties of these composite materials as a key aspect in the automotive sector and weight reduction [2]. CFRTPs provide high resistance to compression and high recycling efficiency compared to thermosets [3]
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