Zobrazeno 1 - 10
of 74
pro vyhledávání: '"Joel de Jesus"'
Publikováno v:
Metals, Vol 14, Iss 6, p 663 (2024)
In the present work, a study of the fatigue strength of two materials widely used in the production of molds, namely, the AISI P20 and AISI H13 steels, is presented. The tests were performed at a constant amplitude with a stress ratio of R = 0 using
Externí odkaz:
https://doaj.org/article/02e6488227824b06a37a2101e721a907
Autor:
Rui F. Fernandes, Joel de Jesus, Luís Borrego, Luís Vilhena, Amílcar Ramalho, José A. M. Ferreira
Publikováno v:
Metals, Vol 12, Iss 3, p 433 (2022)
Maraging steels are used in several industries, namely in the molds industry. The determination of fatigue crack propagation resistance in 18Ni300 maraging steel at the Paris regime is a vital issue for safety-relevant components, which are designed
Externí odkaz:
https://doaj.org/article/2d32dfb5cee3410f86d8d895dc194c84
Publikováno v:
Applied Sciences, Vol 11, Iss 16, p 7346 (2021)
In this work, local properties such as hardness and fatigue crack grow rate in the heat-affected zone of four laser-welded butt joints in thin high-strength low-alloy steel were examined, so as to explain and predict fatigue lives at high stress leve
Externí odkaz:
https://doaj.org/article/1ee2048f96024e849c3367fd6430e292
Autor:
Luís Santos, Joel de Jesus, Luís Borrego, José A. M. Ferreira, Rui F. Fernandes, José D. M. da Costa, Carlos Capela
Publikováno v:
Metals, Vol 11, Iss 5, p 835 (2021)
This investigation concerns about of fatigue behavior under controlled loading and under strain control for hybrid specimens with parts produced with conventional processes in steel AISI H13 and the stainless steel AISI 420 and the rest part produced
Externí odkaz:
https://doaj.org/article/6d504b25df4d4f69a8e7fbf7deff0f6a
Publikováno v:
Metals, Vol 11, Iss 3, p 433 (2021)
Fatigue crack growth is usually studied using C(T) or M(T) specimens with through-thickness cracks. The objective of the present study is to propose a cylindrical specimen with central crack, produced by additive manufacturing. This geometry allows t
Externí odkaz:
https://doaj.org/article/c2127bdff7394e5b9755a87420503e8e
Publikováno v:
Economia & Região, Vol 4, Iss 1, Pp 103-120 (2016)
The concept of human development has evolved over the years, from a simple measure of per capita income to more sophisticated definitions, such as the capability approach by Amartya Sen, which is related not only to what people have, but also to a ra
Externí odkaz:
https://doaj.org/article/addbcf8d4beb46be9927353310798764
Publikováno v:
Economia & Região, Vol 4, Iss 1 (2016)
O conceito de desenvolvimento humano evoluiu muito ao longo dos anos, de uma simples medida de renda per capita, até definições mais sofisticadas como o da abordagem das capacitações de Amartya Sen, que está relacionada não apenas aos que as p
Externí odkaz:
https://doaj.org/article/842f38f5111a4a9aa5344fb9ad894771
Publikováno v:
Applied Sciences, Vol 8, Iss 10, p 1879 (2018)
Selective Laser Melting (SLM) is currently one of the more advanced manufacturing and prototyping processes, allowing the 3D-printing of complex parts through the layer-by-layer deposition of powder materials melted by laser. This work concerns the s
Externí odkaz:
https://doaj.org/article/02b4ba93f887482d9aeb732f4e9b22d2
Publikováno v:
Revista Contabilidade & Finanças, Vol 20, Iss 51, Pp 44-60 (2009)
O objetivo deste estudo é analisar se a Lei de Responsabilidade Fiscal, como mecanismo de restrição fiscal, influenciou o padrão de endividamento praticado pelos municípios brasileiros com mais de 100 mil habitantes no período de 1998 a 2006. P
Externí odkaz:
https://doaj.org/article/65d0d7cb75534b7091c8d6c94a42d624
Autor:
Mendoza-Temis, Joel de Jesús, Wu, Meng-Ru, Langanke, Karlheinz, Martínez-Pinedo, Gabriel, Bauswein, Andreas, Janka, Hans-Thomas
Publikováno v:
Phys. Rev. C 92, 055805 (2015)
We have performed r-process calculations for matter ejected dynamically in neutron star mergers based on a complete set of trajectories from a three-dimensional relativistic smoothed particle hydrodynamic simulation. Our calculations consider an exte
Externí odkaz:
http://arxiv.org/abs/1409.6135
