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Introducción al cracking catalítico
(Universidad Nacional de Ingeniería, 2023)
Crack use in São Paulo
(Marcel Dekker Inc, 1996-01-01)
Documented crack use emerged in São Paulo, Brazil, from 1991 onward. Therefore, it is a recent behavior among drug users. the present work draws a profile of São Paulo crack users, employing an ethnographic approach. ...
Inter-relationships among elastic constants for symmetrical or unsymmetrical laminates with cracked 90-plies
(Taylor & Francis, 2020-02-22)
The relations between the stiffness components of a symmetrical or unsymmetrical laminate having trans-verse matrix cracks only in the 90-degree laminas are explored in this work. The crack closure condition for these ...
Embrittlement of case hardened steel chain link
(PERGAMON-ELSEVIER SCIENCE LTD, 2009)
Various steel chain links presented cracking during their manufacturing process, which includes induction case hardening and electrogalvanizing steps. Fractographic examination of the exposed crack surfaces revealed ...
Crack Detection and Dynamic Analysis of a Cracked Rotor with Soft Bearings Using Different Methods of Solution
(2019-01-01)
The ratio of bearing stiffness to the shaft stiffness has a significant impact on the lower frequencies, mode shapes and, consequently, the whirl orbits. Most works studying crack detection methods in rotating systems use ...
3-D stress intensity factors for arrays of inner radial lunular or crescentic cracks in a typical spherical pressure vessel
(PERGAMON-ELSEVIER SCIENCE LTD, 2010)
Many spherical pressure vessels are manufactured by methods such as the integrated hydro-bulge forming (IHBF) method, where the sphere is composed of a series of double curved petals welded along their meridional lines. ...
Crack users conceptions concerning the drugConcepciones de los usuarios de crack sobre la drogaConcepções de usuários de crack acerca da droga
(Universidade Federal de Santa Maria, 2015)
Crack: the beginning of the stone in BrazilCrack: el inicio de la piedra en Brasil
(Universidad de Costa Rica, 2014)