Zobrazeno 1 - 10
of 13
pro vyhledávání: '"Luiz Fernando P. Franca"'
Publikováno v:
Shock and Vibration, Vol 13, Iss 4-5, Pp 315-326 (2006)
Non-smooth systems are abundant in nature being usually related to physical systems with dry friction, impact and backlash. These systems operate in different modes, and the transition from one mode to another can often be idealized as an instantaneo
Externí odkaz:
https://doaj.org/article/9f608c3014a443f19d0a6393dcf6ff24
Publikováno v:
Wear. :34-42
The drilling response of impregnated diamond (ID) bits is controlled by processes involved in the rock fragmentation, and also the wear processes that continuously change the bearing surface of diamonds and bonding matrix. Due to the co-existence of
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::0844615d9d70d43ba09e600fefc386d6
https://doi.org/10.1016/j.wear.2018.04.010
https://doi.org/10.1016/j.wear.2018.04.010
Publikováno v:
Journal of Materials Processing Technology. 277:116453
This paper deals with the effect of the CBN grit shape on the grindability of a low alloy chrome steel, 100Cr6. Firstly, a simple wheel-workpiece interaction model is introduced to investigate the grinding response. The formulation considers the glob
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6e73b2394e3ca5379af25b3305dc850a
https://doi.org/10.1016/j.jmatprotec.2019.116453
https://doi.org/10.1016/j.jmatprotec.2019.116453
Publikováno v:
International Journal of Rock Mechanics and Mining Sciences. 73:184-193
Impregnated diamond bit has emerged as one of the most commonly used types in the extraction of underground resources in hard and abrasive formations. Despite the success and its frequent use, the drilling performance of these bits is still quite vol
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::42ad0da8b0db3f98a80a750a7b434f0a
https://doi.org/10.1016/j.ijrmms.2014.09.010
https://doi.org/10.1016/j.ijrmms.2014.09.010
Autor:
Luiz Fernando P. Franca
Publikováno v:
International Journal of Rock Mechanics and Mining Sciences. 48:827-835
Rotary–percussive drilling is considered a promising approach to improve drilling performance in hard rock formations. Different from percussive drilling, it is a hybrid form of drilling, since the weight-on-bit and the angular velocity are still a
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::73271b97b7d0352087877c77ac95a1aa
https://doi.org/10.1016/j.ijrmms.2011.05.007
https://doi.org/10.1016/j.ijrmms.2011.05.007
Publikováno v:
Chaos, Solitons & Fractals. 38:685-695
Non-smooth characteristics are, in general, the source of difficulties for the modeling and simulation of natural systems. These characteristics are usually related to either the friction phenomenon or the discontinuous behavior as intermittent conta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::28ac86aa3fa02dbf17ed7368ecf613ba
https://doi.org/10.1016/j.chaos.2007.01.005
https://doi.org/10.1016/j.chaos.2007.01.005
Publikováno v:
Journal of Sound and Vibration. 301:59-73
Nature is full of non-smooth nonlinearities that are usually related to either friction phenomena or the discontinuous characteristics of intermittent contacts. In general, non-smooth characteristics cause difficulties in the modeling and simulation
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b63728558d88a37b1b0ff59d28d1dc8f
https://doi.org/10.1016/j.jsv.2006.09.014
https://doi.org/10.1016/j.jsv.2006.09.014
Publikováno v:
Chaos, Solitons & Fractals. 21:789-801
New drilling techniques have been studied to increase the penetration in hard rock formations. These techniques use harmonic loads and, in some cases, also impacts to generate a greater penetration rate. Analyzing only a percussive penetration phenom
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52c9c9697bbb25dd3e379d065986ee29
https://doi.org/10.1016/j.chaos.2003.12.064
https://doi.org/10.1016/j.chaos.2003.12.064
Publikováno v:
Shock and Vibration, Vol 10, Iss 1, Pp 37-50 (2003)
This contribution presents an investigation on noise sensitivity of some of the most disseminated techniques employed to estimate Lyapunov exponents from time series. Since noise contamination is unavoidable in cases of data acquisition, it is import
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a84c06bc239290e8c1dddb98a86a711a
https://doi.org/10.1155/2003/437609
https://doi.org/10.1155/2003/437609
Publikováno v:
Journal of the Brazilian Society of Mechanical Sciences, Volume: 23, Issue: 4, Pages: 427-439, Published: 2001
Chaotic dynamical systems exhibit trajectories in their phase space that converges to a strange attractor. The strangeness of the chaotic attractor is associated with its dimension in which instance it is described by a noninteger dimension. This con
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f5f1f12a4917701caa6a041baf260f74
https://doi.org/10.1590/s0100-73862001000400004
https://doi.org/10.1590/s0100-73862001000400004