Results 11 to 20 of about 409,065 (293)

Laboratory observations of permeability enhancement by fluid pressure oscillation of in situ fractured rock [PDF]

open access: yes, 2011
We report on laboratory experiments designed to investigate the influence of pore pressure oscillations on the effective permeability of fractured rock.
Brodsky, Emily E.   +3 more
core   +11 more sources

Role of disordered bipolar complexions on the sulfur embrittlement of nickel general grain boundaries [PDF]

open access: yes, 2018
Minor impurities can cause catastrophic fracture of normally ductile metals. Here, a classic example is represented by the sulfur embrittlement of nickel, whose atomic-level mechanism has puzzled researchers for nearly a century.
Hu, Tao   +4 more
core   +3 more sources

AN INVESTIGATION INTO FRACTURE TOUGHNESS AND MECHANISMS IN ANISOTROPIC ROCKS USING THE ACOUSTIC EMISSION METHOD

open access: yesRudarsko-geološko-naftni Zbornik, 2020
Anisotropy in rock is among the important parameters that should be considered in studying fracture toughness and fracture mechanisms. Acoustic emission is one of the methods applied to investigate fracture mechanics and how microcracks grow in rock ...
Hadi Zadsar   +2 more
doaj   +1 more source

Fracture mechanics principles

open access: yesDental Materials, 1995
The principles of linear elastic fracture mechanics (LEFM) were developed in the 1950s by George Irwin (1957). This work was based on previous investigations of Griffith (1920) and Orowan (1944). Irwin (1957) demonstrated that a crack shape in a particular location with respect to the loading geometry had a stress intensity associated with it.
Department of Materials Science and Engineering, University of Florida, Gainesville, Florida, USA ( host institution )   +1 more
openaire   +3 more sources

Static mechanical properties and damage evolution characteristics of selected rocks in diversion tunnel under uniaxial loading [PDF]

open access: yesArchives of Civil Engineering
An in-depth understanding of the mechanical properties and damage and fracture mechanism of selected rocks in a diversion tunnel plays an important role in promoting the efficient construction and safety of rock blasting excavation in a diversion tunnel.
Rongzhou Yang   +4 more
doaj   +1 more source

Ultra-high frequency vibration fatigue of DD6 single crystal superalloy simulating thin-walled specimens

open access: yesJournal of Aeronautical Materials, 2023
The effect of specimen thickness on the very high cycle fatigue (VHCF) properties of DD6 nickel-based single crystal superalloys for turbine blades with hollow air-cooled structure was investigated. Based on the finite element method (FEM), a thin-walled
GAO Zhiyuan   +7 more
doaj   +1 more source

Creep Behavior of a 4.5%Re/3.0%Ru Containing Single Crystal Nickel-based Superalloy at Elevated Temperature

open access: yesCailiao gongcheng, 2017
The creep behavior of a containing 4.5%Re/3.0%Ru single crystal nickel-based superalloy at elevated temperatures was investigated by means of creep properties measurement and microstructure observations to specimens in different creep stages by SEM and ...
SHU De-long   +4 more
doaj   +1 more source

Fatigue characteristics of copper-steel electron beam welding materials

open access: yesCailiao gongcheng, 2023
The fatigue performance of dissimilar metal welded components has an important influence on the service reliability of spacecraft. The fatigue life and fatigue fracture mechanism of dissimilar metal welded joints of QCr0.8 copper alloy and 1Cr21Ni5Ti ...
CHEN Yu   +9 more
doaj   +1 more source

Funding Era Free Speech Theory: Applying Traditional Speech Protection to the Regulation of Anonymous Cyberspace [PDF]

open access: yes, 2014
Background Blunt trauma is the most frequent mechanism of injury in multiple trauma, commonly resulting from road traffic collisions or falls. Two of the most frequent injuries in patients with multiple trauma are chest trauma and extremity fracture ...
Andreas Seekamp   +12 more
core   +2 more sources

An aging evaluation of the bearing performances of glass fiber composite laminate in salt spray fog environment [PDF]

open access: yes, 2019
The aim of the present paper is to assess the bearing performance evolution of pinned, glass-composite laminates due to environmental aging in salt-spray fog tests.
Bruzzaniti P. G.   +4 more
core   +1 more source

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