نتایج جستجو برای: circumferential crack

تعداد نتایج: 31361  

2011
Punit Arora S. Sivaprasad

As a part of component integrity test program at Bhabha Atomic Research Centre, fatigue tests on full scale pipe and pipe welds were conducted in addition to CT and TPB specimens. In this paper the outcome of this program is discussed. Specimen testing was conducted to determine the basic cyclic stress strain curve, LCF and FCGR properties. FCGR tests were conducted on CT and TPB specimens to u...

2014
E. Hintsala D. Kiener W. W. Gerberich

A novel method for preparing and testing bending specimens in-situ the TEM has been developed. This method provides high visibility of the crack front and its associated plastic zone. This is significant because energy release rates can now be calculated at many points throughout the test based on crack tip opening displacement (CTOD), crack opening angle (COA), and crack advance. Further refin...

2015
Lei Zhou Ya-Fang Guo

In this work, the plastic deformation mechanisms responsible for mechanical properties and fracture toughness in nanotwinned (NT) magnesium is studied by molecular dynamics (MD) simulation. The influence of twin boundary (TBs) spacing and crack position on deformation behaviors are investigated. The microstructure evolution at the crack tip are not exactly the same for the left edge crack (LEC)...

Journal: :journal of mechanical research and application 2009
mehdi pourmahmoud

modelling of crack propagation by finite element method under mixed mode conditions is of prime importance in fracture mechanics. this paper describes an application of finite element method to the analysis of mixed mode crack growth in linear elastic fracture mechanics. crack growth process is simulated by an incremental crack-extension analysis based on the maximum principal stress criterion,...

2016
Lisa Lazarus Sheetal Patel Ashley Shaw Sean Leblanc Christine Lalonde Manisha Hladio Kira Mandryk Cynthia Horvath William Petrcich Claire Kendall Mark W. Tyndall

OBJECTIVES HIV prevalence among people who inject drugs (PWID) in Ottawa is estimated at about 10%. The successful integration of peers into outreach efforts and wider access to HIV point-of-care testing (POCT) create opportunities to explore the role of peers in providing HIV testing. The PROUD study, in partnership with Ottawa Public Health (OPH), sought to develop a model for community-based...

Journal: :Journal of pediatric psychology 2007
Wendy K K Lam Jessica D Cance Agatha N Eke Diana H Fishbein Stephanie R Hawkins J Cassie Williams

OBJECTIVE To examine relationships between parenting behaviors, parent-child relationship, and moderating effects of age on youth substance use among a community sample of African-American mothers who use crack cocaine and their children (12-17 years). METHODS Maternal-child dyads (n = 208) were recruited through street outreach and snowball sampling and completed interviews about substance u...

Journal: :journal of artificial intelligence in electrical engineering 0
siamak ghadimi journal of artificial intelligence in electrical engineering, seyed sina kourehli journal of artificial intelligence in electrical engineering

in this paper, the crack detection and depth ratio estimation method are presented in beamlikestructures using elman networks. for this purpose, by using the frequencies of modes asinput, crack depth ratio of each element was detected as output. performance of the proposedmethod was evaluated by using three numerical scenarios of crack for fixed-simply supportedbeam consisting of a single crack...

Journal: :British journal of anaesthesia 2014
D Marhofer M K Karmakar P Marhofer S C Kettner M Weber M Zeitlinger

BACKGROUND The relation between the pattern of local anaesthetic (LA) spread and the quality of peripheral nerve block is unclear. METHODS Twenty-one volunteers were randomized to receive a median nerve block with intended circumferential or intended non-circumferential spread of LA. Different predetermined volumes and needle placement techniques were used to produce the different patterns of...

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