Publication :


Title:

Surface and machining induced damage characterization of abrasive water jet milled carbon/epoxy composite specimens and their impact on tensile behavior

Authors: A. Hejjaji, R. Zitoune, L. Crouzeix, S. Le Roux and F. Collombet
Year: 2017
Journal: Wear.
Volume: 376-377, Pages: 1356-1364

DOI: https://doi.org/10.1016/j.wear.2017.02.024
Référencé ISI Web Of Science
Référencé Scopus

Abstract:
Controlled depth during milling of composites structures by abrasive water jet (AWJ) is a new area of machining which is being explored. In this case, the mechanism of material removal is manifests by erosive wear. The knowledge on milling composites by AWJ is unexplored, hence it is essential to investigate the surface quality and damage induced to ascertain their mechanical reliability. In this study, carbon fiber reinforced plastic (CFRP) laminates are milled using AWJ process and surfaces generated in function of the process parameters are characterized using roughness systems, X-ray tomography and scanning electron microscopy (SEM). SEM images reveal presence of damages in form of craters, ridges, broken fibers and embedded abrasive particles (on milled surface). Crater formation due to the erosion phenomenon is mainly affected by jet pressure. In fact, it is seen that the crater volume increases by 500% when the pressure varies from 80 MPa to 140MPa. In the literature review the correlation between the roughness of the machined surface and the mechanical behavior is ambiguous and remains an open problem. Hence, novel attempt has been made to analyze the influence of crater volume on tensile strength. Mechanical tests conducted on specimens with varying surface texture and crater sizes reveals that tensile strength of machined specimens is more influenced by crater volume rather than surface roughness. Keywords: Abrasive water jet milling, Machining damage, Surface topography, Tensile strength.

Bibtex citation :
@article{Hejjaji2017,
Author={Hejjaji, A. and Zitoune, R. and Crouzeix, L. and Le Roux, S. and Collombet, F.},
Title={Surface and machining induced damage characterization of abrasive water jet milled carbon/epoxy composite specimens and their impact on tensile behavior},
Journal={Wear},
Volume={376-377},
Number={},
Pages={1356-1364},
Year={2017}}


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