Drilling Cycle
Mostrando 1-10 de 10 artigos, teses e dissertações.
-
1. Mode I+II Fatigue Crack Growth Delay by Stop-Holes
ABSTRACT: The technique of retarding the growth of fatigue cracks by drilling holes on the crack tip is well known. Most of the research works on this subject are limited to fatigue cracks subjected to mode I loading conditions. In the present work the fatigue crack growth retardation by stop-holes of cracks under mode I+II loading is investigated. The propo
J. Aerosp. Technol. Manag.. Publicado em: 29/03/2018
-
2. Investigation on the Effects of Process Parameters on Laser Percussion Drilling Using Finite Element Methodology; Statistical Modelling and Optimization
Abstract In the present research, the simulation of the Nickel-base superalloy Inconel 718 fiber-laser drilling process with the thickness of 1mm is investigated through the Finite Element Method. In order to specify the appropriate Gaussian distribution of laser beam, the results of an experimental research on glass laser drilling were simulated using three
Lat. Am. j. solids struct.. Publicado em: 2017-03
-
3. Design of conformal cooling for plastic injection moulding by heat transfer simulation
The cooling channels of a mold for plastic injection have to be as close as possible to the part geometry in order to ensure fast and homogeneous cooling. However, conventional methods to manufacture cooling channels (drilling) can only produce linear holes. Selective laser melting (SLM) is an additive manufacturing technique capable to manufacture complex c
Polímeros. Publicado em: 2015-12
-
4. Evidences of the influence of the detonation sequence in rock fragmentation by blasting – Part I
Drilling and blasting are fundamental operations in the mining cycle and consti tute an important component of the mining costs. Rock fragmentation can in principle be managed by means of two options: by increasing or reducing the specific consumption of explosives, or by modifying the drilling pattern. The choice of one or other type of control depends on t
Rem: Rev. Esc. Minas. Publicado em: 2015-09
-
5. Improvement of the productivity in getting holes in aviation aluminum alloys with high speed tools / Melhoria da produtividade na obtenção de furos em liga de aluminio aeronautico com ferramentas de aço rapido
The purpose of this study is to optimize the manufacturing process of holes made by Company X in one of their products. Besides the optimization, should be maintained the dimensional quality by controlling the diameter, roundness, circularity, and surface finish of cylindrical holes obtained by the widening process, with high-speed steel reamers in a aluminu
Publicado em: 2010
-
6. Influência do ciclo de füração na usinabilidade do ferro fundido cinzento GH190 / Influence of Cycle Drilling Machinability in Gray Cast Iron GH190
Dentre as operações de usinagem, a furação com brocas helicoidais destaca-se por ser uma das mais utilizadas na indústria metal-mecânica. Apesar de a literatura apresentar muitas pesquisas, percebe-se que ainda existe espaço para trabalhos científicos sobre o processo de furação. O presente trabalho analisa a influência do ciclo de furação (cont
Publicado em: 2010
-
7. BIOLOGIA E TÉCNICAS DE CRIAÇÃO DE Trichospilus diatraeae (HYMENOPTERA: EULOPHIDAE) EM PUPAS DE Tenebrio molitor (COLEOPTERA: TENEBRIONIDAE) E Diatraea saccharalis (LEPIDOPTERA: CRAMBIDAE)
The potential for Trichospilus diatraeae Cherian &Margabandhu, 1942 (Hymenoptera:Eulophidae) as biological control agent in Brazil is unknown and, therefore, this research assessed the feasibility of pupae of Tenebrio molitor Linnaeus, 1758 (Coleoptera:Tenebrionidae) as host alternative, to optimize its production in the laboratory for the control of Diatrae
Publicado em: 2009
-
8. Efeito do BÃrio e CÃdmio no desenvolvimento populacional de Pellioditis marina ( Bastian, 1865) ( Nematoda, Rhabtidae) e Diplollaimeloides oschei Meyl, 1954 ( Nematoda, Monhysteridae)
Oil and gas drilling activities usually involve the use of fluids that contain several heavymetals, among those, barium and cadmium, which can affect the biota from the surrounding area. Nematodes are the most abundant metazoan, and play an important role on the food web and in the carbon flux. The aim of this work was to analyze the population development o
Publicado em: 2008
-
9. Metodologia para o desenvolvimento de campos de petroleo
The main scope of this work is to study and develop a methodology which allows the elaboration of project for oilfield development. Therefore it is necessary to consider the integration of the human, technological and economical issues that are important parameters in the engineering project. The spiral concept was applied for the project in order to coordin
Publicado em: 1998
-
10. Methanosarcina mazei LYC, a New Methanogenic Isolate Which Produces a Disaggregating Enzyme
A methanogenic coccoid organism, Methanosarcina mazei LYC, was isolated from alkaline sediment obtained from an oil exploration drilling site. The isolate resembled M. mazei S-6 by exhibiting different morphophases during its normal growth cycle. It differed from M. mazei S-6 by undergoint a spontaneous shift from large, irregular aggregates of cells to smal