10.1016/j.compstruct.2017.10.061

10.1016/j.compstruct.2017.10.061 Composite Structures 184 (2018) 1147–1155 Contents lists available at ScienceDirect Composite Structures journal homepage: www.elsevier.com/locate/compstruct Experimental and numerical analysis of step drill bit performance when MARK drilling woven CFRPs a, b c a N. Feito , J. Díaz-Álvarez , J. López-Puente , M.H. Miguelez Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain Department of Bioengineering and Aerospace Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain Department of Continuum Media and Structural Analysis, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain ARTICLE I NFO ABSTRACT Keywords: This paper focuses on the influence of the step drill bit geometry on the damage induced during drilling Carbon Drilling Fiber Reinforced Polymer materials (CFRPs). Step geometry designed with the aim of avoiding composite da- CFRP mage in CFRPs drilling, is compared to conventional twist configuration. Despite the reduction of thrust force Numerical modelling and torque observed when using the step drill, the delamination was only reduced at low feed rates. A numerical Delamination model developed for the step geometry was validated with experimental data demonstrating its ability to predict thrust force and delamination for different values http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png

10.1016/j.compstruct.2017.10.061

Elsevier — Jun 11, 2020

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Abstract

Composite Structures 184 (2018) 1147–1155 Contents lists available at ScienceDirect Composite Structures journal homepage: www.elsevier.com/locate/compstruct Experimental and numerical analysis of step drill bit performance when MARK drilling woven CFRPs a, b c a N. Feito , J. Díaz-Álvarez , J. López-Puente , M.H. Miguelez Department of Mechanical Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain Department of Bioengineering and Aerospace Engineering, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain Department of Continuum Media and Structural Analysis, Universidad Carlos III de Madrid, Avda. Universidad 30, 28911 Leganés, Madrid, Spain ARTICLE I NFO ABSTRACT Keywords: This paper focuses on the influence of the step drill bit geometry on the damage induced during drilling Carbon Drilling Fiber Reinforced Polymer materials (CFRPs). Step geometry designed with the aim of avoiding composite da- CFRP mage in CFRPs drilling, is compared to conventional twist configuration. Despite the reduction of thrust force Numerical modelling and torque observed when using the step drill, the delamination was only reduced at low feed rates. A numerical Delamination model developed for the step geometry was validated with experimental data demonstrating its ability to predict thrust force and delamination for different values

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