Results 241 to 250 of about 2,886,370 (294)

On the fracture resistance of dragonfly wings

Journal of the Mechanical Behavior of Biomedical Materials, 2019
The biological success of insects is attributed to evolution of their wings. Over 400 million years of evolution, insect wings have become one of the most complex and adaptive locomotor structures in the animal kingdom. Although seemingly fragile, they satisfactorily perform their intended function under millions of cycles of repeated stress without ...
J, Rudolf, L-Y, Wang, S N, Gorb, H, Rajabi   +3 more
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Design of fracture resistant structures

International Journal of Fracture, 2008
zbMATH Open Web Interface contents unavailable due to conflicting licenses.
N. V. BANICHUK, S. Y.U. IVANOVA, RAGNEDDA, FRANCESCO   +2 more
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The fracture resistance of dental materials

Journal of Oral Rehabilitation, 1995
summary A novel test procedure was developed that provides the basis for a standard plain strain fracture toughness test to evaluate fracture resistance of resin‐based materials. This procedure utilizes a notched disc specimen. Using this technique, a new concept of‘Torque to initiate fracture (T)’was suggested.
S, Uctasli, E, Harrington, H J, Wilson
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Reduction in Fracture Resistance of the Root with Aging

Journal of Endodontics, 2017
The incidence of vertical root fracture in endodontically treated teeth increases with patient age. This study evaluated the microstructure, chemical composition, and mechanical properties of radicular dentin as a function of aging.Single-rooted teeth were obtained from adult donors ranging from age 15 to older than 80 years.
Yan W., Montoya C., Øilo M., Ossa A., Paranjpe A., Zhang H., Arola D.   +6 more
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Fracture resistance of paper

Journal of Materials Science, 1974
An attempt has been made to apply the concepts of fracture mechanics to describe the behaviour of a paper sheet with a crack. Considering paper as an orthotropic homogeneous continuum, the critical strain energy release rate, G c, for eight different papers has been measured using linear elastic fracture mechanics. Also, a direct measurement of work of
R. S. Seth, D. H. Page
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Resistance of Hardmetals to Fracture

Powder Metallurgy, 1998
Abstract Strength of WC and TiC base hardmetals and their durability in metalforming (blanking) operations have been investigated. It has been shown that transverse rupture strength R TZ, critical stress intensity factor K Ic, and ultimate plastic strain ep as individual properties do not enable exact estimation of the resistance of hardmetals to ...
H. Reshetnyak, J. Kübarsepp
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Microstructure and the resistance of rock to tensile fracture

Journal of Geophysical Research: Solid Earth, 1985
The resistance of rock to tensile fracture may be measured by its fracture energy GI, which is found to range from 40 to 200 J/m2 in tests on nine types of sedimentary and crystalline rock. Differences in microstructure among the rocks tested are the principal cause of differences in the steady state value of GI, in the distance that a crack must ...
Peck, Lindamae, Barton, Christopher C., Gordon, Robert B.   +2 more
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Size effect on fracture resistance and fracture energy of concrete

Materials and Structures, 2003
A recent asymptotic approach dealing with the size effect on the fracture properties of a large plate is further developed to consider the influence of both the front and back free surfaces of small sized specimens. The new extension is applied to experimental results found in the literature, and good agreements have been found between the predictions ...
K. Duan, X. -Z. Hu, F. H. Wittmann
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Resistance to fracture of endodontically treated roots

Oral Surgery, Oral Medicine, Oral Pathology, 1992
The root canals of 48 single-canal canine teeth were prepared by four different methods. The coronal lingual wall and root canal space were lowered to 2 mm below the buccal wall of the roots. The prepared root was placed into acrylic resin so that 12 mm of buccal root was exposed. A slowly increasing force was applied at the junction of the buccal wall
M, Trope, H L, Ray
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Brittle Fracture Resistance Characteristics of Weather-Resistant 14KhGNDTs Steel

Russian Metallurgy (Metally), 2020
The effect of carbon, zirconium, and vanadium content on the characteristics of brittle fracture resistance of weather-resistant 14XGNDC steel is investigated. The correlation of the propagation of a viscous crack with the volume fraction of perlite is considered.
V.M. Goritskii, G.R. Shneiderov
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