Plastic Zones
Mostrando 1-12 de 17 artigos, teses e dissertações.
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1. Analytical solution of circular tunnel in elastic-viscoplastic rock mass
Abstract This paper deals with a deep circular tunnel excavated in infinite homogeneous and isotropic elasto-viscoplastic rock mass subjected to a hydrostatic initial stresses. The tunnel is divided into the initial plastic, viscoplastic, and elastic zones. By combining the generalized Bingham model with Mohr-Coulomb yield criteria, analytical solutions of t
Lat. Am. j. solids struct.. Publicado em: 29/07/2019
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2. Fruit sphere microenvironments and berry phenolic content of Cabernet Sauvignon (Vitis vinifera L.) cultivated under rain-shelter systems with coloured plastic film
Abstract Rain-shelter cultivation has been proven an important cultivation method for grape-plantings in continental monsoon climate zones, of which white plastic films are the most common shelter material. However, while this method and material reduces the occurrence of the disease, it can also decrease the grape berry quality. Five colours (including red,
Food Sci. Technol. Publicado em: 20/07/2017
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3. Experimental Studies of Dynamic Behavior of TiNi Alloy Thin Circular Plate subjected to Transversal Impact
Abstract Here goes the abstract. For instance, one can write that this work The experimental research of thin circular plate of pseudo-elastic TiNi alloy under fixed supports and transversal impact loading was conducted through using the modified apparatus of Split Hopkinson Pressure Bar. The experiment results of pseudo-elastic TiNi alloy was compared with
Lat. Am. j. solids struct.. Publicado em: 2016-12
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4. Laser beam welding tempered 300M ultrahigh mechanical strength steel
AISI 300M ultrahigh strength steel has been used in a number of high demanding applications, such as the VLS Brazilian rocket project. This work intends to propose laser beam welding, with subsequent tempering, as a possible route for the fabrication of engineering pieces of this steel. A 2 kW fiber laser was used to produce welded coupons for metallographic
Journal of the Brazilian Society of Mechanical Sciences and Engineering. Publicado em: 2012-03
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5. ESTIMATES OF PLASTIC ZONES AHEAD OF CRACKS TIPS / ESTIMATIVAS DE ZONAS PLÁSTICAS À FRENTE DE PONTAS DE TRINCAS
O tamanho das zonas plásticas (zps) presentes na ponta de trincas valida a utilização da Mecânica da Fratura Linear Elástica (MFLE). Dessa forma, a partir das estimativas dessas zps, este trabalho estuda o limite de validade dos dois parâmetros que caracterizam MFLE. Esses dois parâmetros são o Fator de Intensidade de Tensões (K) e a T-stress. Este
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 15/09/2011
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6. As ligações semirrígidas na análise avançada com zona plástica de portais planos de aço
In this work, the development of the Plastic-Zones Advanced Analysis of plane steel portals is studied, now including the connections effect. Firstly, this analysis is defined as inelastic second-order which capture the plasticity spread by slice technique and includes the Main Aspects as geometric (out-of-straight and out-of-plumb) and physical imperfection
Publicado em: 2010
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7. Evolução estrutural brasiliana da Província Borborema na região de Campina Grande, (PB) / Brasilian structural evolution of Borborema Province in the Campina Grande region (PB)
The systematic mapping of Campina Grande sheet (1:100.000) is very important to understand the structural and geochronological relations between different terranes of the Transversal Zone, Borborema Province (NE Brazil). The mapped area is an excellent natural laboratory to apply classical and modern techniques of structural geology for the study of mechanis
Publicado em: 2008
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8. EFEITO DA TENSÃO NOMINAL NO TAMANHO E FORMA DA ZONA PLÁSTICA / THE ESTIMATES OF THE SIZE AND SHAPE OF THE PLASTIC ZONES, TRADITIONALLY USED IN THE NOMINAL STRESS IN FRACTURE MECHANICS
The estimates of the size and shape of the plastic zones, traditionally used in Linear Elastic Fracture Mechanics (LEFM), are based on the supposition that the stress intensity factor (SIF) KI (or KII or KIII) is the only necessary parameter to describe them. However, when the linear elastic stress analysis problem is solved in an Inglis plate, or the cracke
Publicado em: 2007
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9. Avaliação do comportamento reológico de pastas de cimento para poços de petróleo com adição de plastificantes
The isolation of adjacent zones encountered during oilwell drilling is carried out by Portland-based cement slurries. The slurries are pumped into the annular positions between the well and the casing. Their rheological behavior is a very important component for the cementing process. Nowadays, several alternative materials are used in oilwell cementing, wit
Publicado em: 2006
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10. Mecanismos de alojamento de magmas granitóides :exemplo do plúton de Japi(RN)
This dissertation describes the igneous suites of the Japi granitoid pluton, intrusive in the Paleoproterozoic gneiss-migmatite complex of the eastern domain of the Seridó Belt, northeastern Brazil. Field relations show that the pluton is affected by strong deformation associated to the Brasiliano orogeny (known as the D3 phase) , with a NW-trending extensi
Publicado em: 1998
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11. A Kinetic Analysis of Phytochrome Controlled Mesocotyl Growth in Zea mays Seedlings
Mesocotyl elongation in 4 day old etiolated seedlings immediately following 3 hours of white light (3 h W) is reversibly controlled by phytochrome. Time-lapse video measurements were made of the 5 millimeter zone just below the coleoptile which is the main growth region of the mesocotyl. The growth kinetics were determined for five contiguous 1 millimeter zo
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12. Ramoplanin susceptibility testing criteria.
Ramoplanin and mupirocin are two antimicrobial agents that may be applied topically. They had similar potencies against susceptible gram-positive cocci, but they differed in their spectra of activity. In plastic microdilution trays, the in vitro activity of ramoplanin was slightly diminished but that activity was restored by the addition of bovine serum albu