Crack Grow
Mostrando 1-5 de 5 artigos, teses e dissertações.
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1. Dynamic crack propagation of granite subjected to biaxial confining pressure and blast loading
Abstract To great understanding the dynamic crack propagation of rock under in-situ stress and blasting, the static-dynamic loading experimental platform was built. With different confining pressure (0MPa, 2MPa, 4MPa, 6MPa, 8MPa) and different ratios (K) of horizontal-to-vertical pressure (0, 0.25, 0.5, 0.75, 1), nine texts have been carried out in quadrate
Lat. Am. j. solids struct.. Publicado em: 02/07/2018
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2. Microstructure Observation of Naturally Aged Thixoforming ZA27 Alloy
The microstructure of the thixoformed ZA27 alloy naturally aged for 5 years has been observed and analyzed. The results indicate that most of the original β + η laminar eutectics have changed into the structures that small α particles uniformly distribute in η phase matrix. Both the β phase and α’ phase have also decomposed. It is suggested that a co
Mat. Res.. Publicado em: 24/11/2015
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3. Synthesis of Cu xO(x = 1,2)/amorphous compounds by dealloying and spontaneous oxidation method
Cu xO(x = 1,2)/amorphous compounds have been successfully synthesized by chemical free dealloying and spontaneous oxidation method. Technological parameters, such as the acid concentration and dealloying time strongly influence the crystal type, size and morphology of coppery oxide. The further study shows that with the increase of HCl concentration, the sur
Mat. Res.. Publicado em: 24/09/2013
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4. Fadiga e mecânica da fratura aplicada a tubos autofretadores de um reator tubular / Fatigue and Fracture Mechanics Applied to Pipes of a Tubular Reactor
Reatores com tecnologia tubular são utilizados em todo o mundo na fabricação de polietileno de baixa densidade. Estes reatores são compostos por tubos em série e a reação acontece no seu interior sob pressões elevadíssimas e o uso de catalisadores. Para que os tubos suportem o trabalho às pressões aplicadas em operação, os tubos são submetidos
Publicado em: 2010
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5. CRESCIMENTO E CARACTERIZAÇÃO DE FIBRAS MONOCRISTALINAS DE FLUORETOS DO TIPO LiY1-xTRxF4 (TR = TERRAS-RARAS) / GROWTH AND CHARACTERIZATION OF FLUORIDE CRYSTALLINE FIBRES TYPE LiY1-xTRxF4 (RE = RARE-EARTH)
In this work we present the growth and characterization of LiF and pure and rare-earth doped (Er and Nd) yttrium-lithium tetra-fluoride (LiYF4 or YLF) by the micro-pulling-down technique (µ-PD). The use of this technique is original for the present purpose. A m-PD prototype in the resistive mode was firstly built to understand the most important operational
Publicado em: 2005