RT Journal Article
T1 Experimental and numerical analysis of step drill bit performance when drilling woven CFRPs
A1 Feito Sánchez, Norberto
A1 Díaz Álvarez, José
A1 López Puente, Jorge
A1 Miguélez Garrido, María Henar
AB This paper focuses on the influence of the step drill bit geometry on the damage induced during drilling Carbon Fiber Reinforced Polymer materials (CFRPs). Step geometry designed with the aim of avoiding composite damage in CFRPs drilling, is compared to conventional twist configuration. Despite the reduction of thrust force and torque observed when using the step drill, the delamination was only reduced at low feed rates. A numerical model developed for the step geometry was validated with experimental data demonstrating its ability to predict thrust force and delamination for different values of feed rate and cutting speed. Numerical model allowed the development of a parametrical study. Finally, using a response surface methodology a mechanistic model and surface diagrams have been presented in order to help in the selection of optimum variables minimizing drilling induced damage.
PB Elsevier
SN 0263-8223
YR 2018
FD 2018-01-15
LK https://hdl.handle.net/10016/32985
UL https://hdl.handle.net/10016/32985
LA eng
NO The authors acknowledge the financial support for this work from the Ministry of Economy and Competitiveness of Spain under the project DPI2011-25999, FEDER program, and the FPI subprogram associated to the project previously mentioned with the reference BES-2012-055162.
DS e-Archivo
RD 30 jun. 2024