43,670 research outputs found
Defect Analysis and Detection of Cutting Regions in CFRP Machining Using AWJM
The use of composite materials with a polymeric matrix, concretely carbon fiber reinforced
polymer, is undergoing further development owing to the maturity reached by the forming processes
and their excellent relationship in terms of specific properties. This means that they can be
implemented more easily in di erent industrial sectors at a lower cost. However, when the
components manufactured demand high dimensional and geometric requirements, they must be
subjected to machining processes that cause damage to the material. As a result, alternative methods
to conventional machining are increasingly being proposed. In this article, the abrasive waterjet
machining process is proposed because of its advantages in terms of high production rates, absence
of thermal damage and respect for the environment. In this way, it was possible to select parameters
(stand-o distance, traverse feed rate, and abrasive mass flow rate) that minimize the characteristic
defects of the process such as taper angle or the identification of di erent surface quality regions in
order to eliminate striations caused by jet deviation. For this purpose, taper angle and roughness
evaluations were carried out in three di erent zones: initial or jet inlet, intermediate, and final or jet
outlet. In this way, it was possible to characterize di erent cutting regions with scanning electronic
microscopy (SEM) and to distinguish the statistical significance of the parameters and their e ects on
the cut through an analysis of variance (ANOVA). This analysis has made it possible to distinguish
the optimal parameters for the process
- …