Results 21 to 30 of about 6,235 (233)

Buoyancy-driven crack propagation: the limit of large fracture toughness [PDF]

open access: yes, 2007
We study steady vertical propagation of a crack filled with buoyant viscous fluid through an elastic solid with large effective fracture toughness. For a crack fed by a constant flux Q, a non-dimensional fracture toughness K=Kc/(3μQm3/2)1/4 describes the
Roper, S.M.   +3 more
core   +1 more source

Failure analysis based on microvoid growth for sheet metal during uniaxial and biaxial tensile tests [PDF]

open access: yes, 2013
The aim of the presented investigations is to perform an analysis of fracture and instability during simple and complex load testing by addressing the influence of ductile damage evolution in necking processes.
Abbassi, Fethi   +2 more
core   +1 more source

Mean Stress Effect on the Axial Fatigue Strength of DIN 34CrNiMo6 Quenched and Tempered Steel

open access: yesMetals, 2018
The present study consists of a theoretical and experimental investigation of the effect of axial mean stresses on the high cycle fatigue behaviour of DIN 34CrNiMo6 high strength steel in quenched and tempered conditions.
Luis Pallarés-Santasmartas   +3 more
doaj   +1 more source

The formulation of mucoadhesive drug form for topical application in the oral cavity - application, manufacturing technology and testing methods [PDF]

open access: yesFarmacja Polska, 2021
There are over four hundred different diseases occurring within the oral cavity. These include, among others, mucositis, periodontitis, gingivitis, caries, oral infections, which are usually treated topically. Active substances for topical application in
Michał Krzysztof Kołodziejczyk   +4 more
doaj   +1 more source

Modelling of Dynamic Behaviour of Orthotropic Metals Including Damage and Failure [PDF]

open access: yes, 2012
A physically based material model for metals, with elastic plastic and damage/failure orthotropy is proposed in this paper. The model is defined within the frameworks of irreversible thermodynamics and configurational continuum mechanics and integrated ...
Djordjevic, Nenad   +2 more
core   +1 more source

Second law of thermodynamics and the failure of rock materials [PDF]

open access: yes, 2001
The relation of nonequilibrium thermodynamics to some failure and fracture theories of rock mechanics is investigated. The basic concepts are given to connect failure to the properties of material equations describing the elastic properties.
Ván, Péter, Vásárhelyi, Balázs
core   +1 more source

Damage Characteristics of Surrounding Rock Subjected to VCR Mining Blasting Shock

open access: yesShock and Vibration, 2015
For limiting the damage range caused by explosive shock loads in vertical crater retreat (VCR) mining, the blasting damage characteristics of surrounding rock were studied by two methods: numerical simulation and ultrasonic testing.
Nan Jiang   +3 more
doaj   +1 more source

Local zigzag effects and brittle delamination fracture of n-layered beams using a structural theory with three displacement variables

open access: yesFracture and Structural Integrity, 2020
Equivalent single layer theories for layered beams effectively and accurately predict global displacements and internal force and moment resultants using a limited number of displacement variables.
Roberta Massabò, Ilaria Monetto
doaj   +1 more source

Analytical and Experimental Investigation into Pre-Stressed Carbon Fiber Reinforced Polymer (CFRP) Fatigue Retrofits for Steel Waterway Lock-Gate Structures

open access: yesMetals, 2022
Lock gates are an important part of the transportation infrastructure within the United States (US). Unfortunately, many existing lock gates have reached or exceeded their initial design lives and require frequent repairs to remain in service ...
Christine Lozano   +3 more
doaj   +1 more source

Grain kernel damage during threshing: a comprehensive review of theories and models

open access: yesJournal of Agricultural Engineering
Grain threshing is aimed at separating the grain from the inedible chaff. However, mechanical forces often damage grains, impacting their quality, market value, and germination ability. This comprehensive review examines theories and models developed to
George Ashwehmbom Looh   +4 more
doaj   +1 more source

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