Results 11 to 20 of about 7,353,639 (302)

Aspects of energy requirements for rock drilling [PDF]

, 1974
Development of laboratory rock breakage techniques to relate energy and surface area produced by slow compression, drop hammer and stamp mill. A detailed study of laboratory rotary-percussive drilling in a wide range of rocks under different ...
Wootton, David
core   +7 more sources

Hawaii Scientific Drilling Project 1993 [PDF]

, 1994
Content: Project Summary, History of Hawaii Project, Permit History, Continental Scientific Drilling Office's Role, Setup and Coring of Kahi Puka Site, Downhole Problems, Cures for Problems, Conclusions, Appendices: Correspondence for Increase in Depth ...

core   +3 more sources

Automated drilling algorithms implementation on a laboratory drilling rig [PDF]

Modeling, Identification and Control, 2020
Considering the state of art technology that exists today and the significant resources that are being invested into the technology of tomorrow, an idea of intelligent and fully automated machineries working on a drilling floor that is capable of ...
Erik Andreas Løken, Jens Løkkevik, Dan Sui   +2 more
doaj   +1 more source

Induced drilling strains in glass fibre reinforced epoxy composites [PDF]

, 2013
Residual strains induced by drilling of glass-fibre reinforced polymers (GFRP) were determined using a hybrid experimental-numerical methodology. Experimentally, a set of GFRP specimens were drilled under well-defined tensile (calibration) stresses ...
STIFFEL, J.-H., Nobre, JP, VAN PAEPEGEM, W., Van Paepegem, WimTW118010012403440000-0003-0672-3675F574E142-F0ED-11E1-A9DE-61C894A0A6B4, BATISTA, Antonio, Nau, A, NOBRE, Joao Paulo, SCHOLTES, B., NOBRE, J.P., NAU, A., Scholtes, B, OUTEIRO, José, Stiffel, JH, Batista, AC, Outeiro, JC, Van Paepegem, Wim, MARTINS DO OUTEIRO, Jose Carlos   +16 more
core   +1 more source

Automated Stratum Interface Detection Using the Optimized Drilling Specific Energy through Self-Adaptive Logistic Function

Sensors, 2023
The precise detection of stratum interfaces holds significant importance in geological discontinuity recognition and roadway support optimization. In this study, the model for locating rock interfaces through change point detection was proposed, and a ...
Kechen Liu, Jingyi Cheng, Xin Sun, Xiang Li, Zhijun Wan, Keke Xing, Jianzhuang Liu   +6 more
doaj   +1 more source

Tool wear monitoring and hole surface quality during CFRP drilling [PDF]

, 2014
The present investigation focuses on the evaluation of tool wear and surface integrity in the context of CFRP cutting. Series of drilling experiments were performed on CFRP plates using cemented carbide solid drills with the aim to investigate ...
RAMIREZ, Christophe, M'SAOUBI, Rachid, POULACHON, Gerard, ROSSI, FREDERIC   +3 more
core   +1 more source

Evaluation of the performance of coated and uncoated carbide tools in drilling thick CFRP/aluminium alloy stacks [PDF]

, 2013
This paper aims to establish the wear mechanisms of coated and uncoated tungsten carbide drills when drilling carbon fibre reinforced plastics (CFRP)/aluminium alloy (Al) stacks. During the drilling experiments, thrust forces were measured.
MONTOYA, Maxime, GEHIN, Daniel, CALAMAZ, Madalina, GIROT, Franck   +3 more
core   +1 more source

Measurement of laser absorptivity for operating parameters characteristic of laser drilling regime [PDF]

, 2008
Publisher version : http://iopscience.iop.org/0022-3727/41/15/155502/Laser drilling in the percussion regime is commonly used in the aircraft industry to drill sub-millimetre holes in metallic targets.
SCHNEIDER, Matthieu, BERTHE, Laurent, FABBRO, Rémy, MULLER, Maryse   +3 more
core   +1 more source

Enhancing the drilling efficiency through the application of machine learning and optimization algorithm

Engineering applications of artificial intelligence, 2023
This article presents a novel Artificial Intelligence (AI) workflow to enhance drilling performance by mitigating the adverse impact of drill-string vibrations on drilling efficiency.
Farouk Said Boukredera, M. Youcefi, A. Hadjadj, C. P. Ezenkwu, V. Vaziri, S. S. Aphale   +5 more
semanticscholar   +1 more source

Optimization of Micro-Drilling of Laminated Aluminum Composite Panel (Al–PE) Using Taguchi Orthogonal Array Design

Materials, 2023
Aluminum Matrix Composite (AMC) represents an innovative class of materials that is extensively utilized in industries such as automotive, defense, aerospace, structural engineering, sports, and electronics. This study investigates the thrust force, exit
Bekir Yalçın, Ali Yüksel, K. Aslantaş, Oğuzhan Der, A. Erçetin   +4 more
semanticscholar   +1 more source