Results 221 to 230 of about 229,715 (264)

Strength criterion for materials with different strengths in tension and compression

Strength of Materials, 1996
It is shown that the fracture of materials which have different strengths in tension and compression and are highly sensitive to the sign of the spherical tensor can be described by using a criterion of the ductility of anisotropic bodies based on the invariance of the form of the limiting surface. Calculated values of breaking stress are compared with
V. N. Bastun, M. I. Kolyakov, Yu. N. Semko   +2 more
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New empirical polyaxial criterion for rock strength

International Journal of Rock Mechanics and Mining Sciences, 2011
Abstract A new criterion is presented for prediction of intact rock and rock mass failure under polyaxial state of stresses. A comprehensive database of the results of uniaxial, triaxial, and polyaxial tests on intact rock was utilized for evaluation of the new criterion and comparison of its accuracy with the most accurate and frequently used ...
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A Test-Retest Criterion for Isometric Strength Testing

Proceedings of the Human Factors Society Annual Meeting, 1984
Isometric strength testing has commonly been used to evaluate human strength capability. Recently it has been proposed by NIOSh as a form of administrative control for injury prevention. Historically, the number of trials used for each person-test combination has been arbitrarily selected and is often undocumented.
Terrence J. Stobbe, Ralph W. Plummer
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A strain-kinetic criterion for thermal fatigue strength

Strength of Materials, 1980
1. A strain-kinetic approach in a linear interpretation may be used to study thermal fatigue resistance. 2. Estimation of thermal fatigue resistance without accounting for the quasistatic damage component leads to conflicting calculations and experimental endurance values differ by a factor of four to five.
I. I. Kotov, A. P. Gusenkov, A. I. Vashunin, G. I. Genkin, V. N. Khoroshilov, E. T. Fedorova   +5 more
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Three-Dimensional Nonlinear Dynamic Strength Criterion for Rock

International Journal of Geomechanics, 2016
AbstractIt is assumed that rocks contain three-dimensional (3D) penny-shaped microcracks. The Mode II and III dynamic stress-intensity factors at the tips of 3D penny-shaped microcracks are determined. The orientation angle of microfailure in rock materials is obtained to describe the dynamic failure of rocks.
X. P. Zhou, Y. D. Shou, Q. H. Qian
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Three-Dimensional Hoek-Brown Strength Criterion for Rocks

Journal of Geotechnical and Geoenvironmental Engineering, 2007
A great number of rock strength criteria have been proposed over the past decades. Of these different strength criteria, the Hoek-Brown strength criterion has been used most widely, because: (1) it has been developed specifically for rock materials and rock masses; (2) its input parameters can be determined from routine unconfined compression tests ...
Lianyang Zhang, Hehua Zhu
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An empirical strength criterion for jet grouted soilcrete

Engineering Geology, 1994
Abstract Based on experimental data, this paper presents an empirical strength criterion for jet grouted soilcrete. Cylindrical specimens drilled from construction sites were tested to investigate the strength characteristics of soilcrete. Experiments conducted include the uniaxial compression test, Brazilian test and the triaxial compression test ...
Yung-Show Fang, Jyh-Jong Liao, Shaw-Chi Sze   +2 more
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A criterion for ascertaining the strength of composite materials

Computers & Structures, 1985
Abstract This paper deals with the failure strength of composite materials in which the reinforcing filaments are parallel. According to this theory the strength of a unidirectional composite material is determined by a particular intermediate strain value and the orientation of the reinforcing filaments relative to the principal stresses.
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Interface strength criterion for elastic bodies

Continuum Mechanics and Thermodynamics, 2022
B. D. Annin, A. G. Kolpakov, S. I. Rakin
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Strength coefficients of the cubic criterion for graphite composites

Journal of Materials Science, 1989
On presente les methodes de determination des coefficients et de l'enveloppe de resistance mecanique du graphite dans un etat de contrainte biaxiale en reliant le critere de resistance cubique aux donnees experimentales.
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