Results 261 to 270 of about 261,552 (302)

Study on strength criterion for frozen soil

Cold Regions Science and Technology, 2019
Abstract It is established that the strength of frozen soil exhibits apparent nonlinearity in the p–q plane. As the mean stress p increases, in certain experimental conditions, the strength of frozen soil increases rapidly and then reduces gradually; however, in certain other conditions, the strength increases gradually and then reduces rapidly.
Xingyan Liu, Enlong Liu, De Zhang, Ge Zhang, Bingtang Song   +4 more
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Empirical Strength Criterion for Rock Masses

Journal of the Geotechnical Engineering Division, 1980
An empirical strength criterion for rocks and rock masses is proposed. The nonlinear criterion includes the uniaxial compressive strength of the intact rock material and introduces two dimensionless parameters, m and s. The parameter m varies with rock type, the angle of interblock or interparticle friction and the degree of block or particle interlock.
Evert Hoek, Edwin T. Brown
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A criterional evaluation of the fatigue strength of metals

Strength of Materials, 1973
It is most proper and basically sound to use the characteristics of inelasticity for a criterional rating of the fatigue strength of metals. This has been confirmed by much experimental data which agrees with some of the existing criteria both for low and for high loading frequencies [I].
I. M. Vasinyuk, L. A. Khamaza
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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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A statistical strength criterion for brittle materials

Strength of Materials, 2011
Based on a probabilistic model of brittle microfracture (microdamage) leading to macrofracture of materials, we propose a statistical interpretation of strength criteria, which relate start of macrofracture (manifested by macrocrack formation in tension or internal structure stability loss in compression) with attainment of a certain (critical) value ...
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A strength criterion for frozen moraine soils

Cold Regions Science and Technology, 2019
Abstract The strength behavior of frozen soils has been extensively investigated in frozen soils mechanics for many years. In order to study the strength properties of frozen moraine soils, a series of cryogenic tri-axial compression tests are carried out under confining pressures ranging from 0.5 MPa to 16 MPa at the temperatures of −0.5 °C, −2.0 °C
Fei Luo, Enlong Liu, Zhanyuan Zhu
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Thermofluctuation theory of strength and the Griffith criterion

Strength of Materials, 1989
An analysis of the physical significance of the Griffith criterion σG from the viewpoint of the first law of thermodynamics (thermodynamic approach) and the viewpoint of the thermofluctuation-theory of strength (kinetic approach) makes it possible to conclude that the criterion is not the fracture criterion it is usually thought to be. It is actually a
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An empirical strength criterion for heterogeneous tuff

Engineering Geology, 1992
Abstract An empirical failure criterion is formulated by expressing the second invariant of stress deviation at failure as a function of the first invariant of stress, key parameter, and volume. Strength data from Apache Leap tuff specimens are analyzed as a demonstration example.
Kittitep Fuenkajorn, Jaak J.K. Daemen
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Form of strength criterion in isotropic materials

Polymer Mechanics, 1975
An examination is made of the staged form of the generalized criterion of strength in isotropic media. The proposed variant for the criterion is constructed on the basis of the oriented character of the damage around the dangerous point. In this case it is proposed that the damage in some particular direction is effected with a certain probability.
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A criterion for dynamic fracture strength of materials

Engineering Fracture Mechanics, 1985
Abstract A phenomenological criterion for damage to materials due to short duration stresses is proposed. Based on the proposed criterion, an equation is obtained to find the time to failure corresponding to an applied stress history. It is shown that the equation is in agreement with several experimental and theoretical studies.
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