Results 171 to 180 of about 16,920 (217)
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physica status solidi (b), 1968
AbstractA model of creep in solids is developed in which flow units, identified with dislocation segments in crystals, overcome energy barriers u1 ≦ u ≦ u2 with the aid of thermal activation. Each successful transition of a unit increases or decreases the barrier for the subsequent jump by a stress‐dependent increment.
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AbstractA model of creep in solids is developed in which flow units, identified with dislocation segments in crystals, overcome energy barriers u1 ≦ u ≦ u2 with the aid of thermal activation. Each successful transition of a unit increases or decreases the barrier for the subsequent jump by a stress‐dependent increment.
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Il Nuovo Cimento D, 1991
Experimental results of dynamic modulus and internal friction, measured directly during creep deformation, and back-stress data from dip test measurements are considered for an explanation of the power law of creep. The explanation is essentially based on the assumption that stationary creep depends on dislocations in the subgrain interior with zones ...
P. GONDI, SILI, Andrea Mariano
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Experimental results of dynamic modulus and internal friction, measured directly during creep deformation, and back-stress data from dip test measurements are considered for an explanation of the power law of creep. The explanation is essentially based on the assumption that stationary creep depends on dislocations in the subgrain interior with zones ...
P. GONDI, SILI, Andrea Mariano
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Compression Creep Characteristics and Creep Model Establishment of Gangue
Geotechnical and Geological Engineering, 2016How to describe the compression creep behavior of gangue is very essential for the design of gangue backfilling mining. In this paper, compression tests of two kinds of gangue are studied, finding that logarithmic function is suitable for describing its equal-time stress–strain relationship. Stress–strain–time relationship is proposed through modifying
Wei-yao Guo +5 more
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2009
Abstract This article, to develop an understanding of the underlying mechanisms governing deformation at elevated temperatures, discusses the phenomenological effects resulting from temperature-induced thermodynamic and kinetic changes. It describes the deformation behavior of engineering materials using expressions known as constitutive
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Abstract This article, to develop an understanding of the underlying mechanisms governing deformation at elevated temperatures, discusses the phenomenological effects resulting from temperature-induced thermodynamic and kinetic changes. It describes the deformation behavior of engineering materials using expressions known as constitutive
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Creep and creep modelling of a multimodal nickel-base superalloy
Acta Materialia, 2011The creep properties of different γ'-Ni3Al distributions in the Ni115 nickel superalloy produced by heat treatment have been examined. At the stresses and temperatures employed it is shown that particle bypass cannot occur by cutting or bowing and so presumably occurs by a climb-glide motion.
Coakley, James +2 more
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2009
Abstract The overarching goal of life-prediction research is to develop models for the various types of time dependencies in the crack-tip damage accumulation that occur in materials subjected to elevated temperatures. This article focuses on describing the models based on creep, oxidation kinetics, evolution of crack-tip stress fields ...
Jeffrey L. Evans, Ashok Saxena
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Abstract The overarching goal of life-prediction research is to develop models for the various types of time dependencies in the crack-tip damage accumulation that occur in materials subjected to elevated temperatures. This article focuses on describing the models based on creep, oxidation kinetics, evolution of crack-tip stress fields ...
Jeffrey L. Evans, Ashok Saxena
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Modeling Creep Processes in Aging Polymers
International Applied Mechanics, 2016zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Olali, N. V. +3 more
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Phenomenological model of creep of dental amalgam
Journal of Oral Rehabilitation, 1983SummaryEarlier work revealed that creep of a particular dental amalgam can be described by the model F(t)=F0 exp (t/t0)m. Here F(t) is the creep compliance at time t, whereas F0, t0 and m are constants of the model. In the previous study only three alloys were used. It was the aim of this study to investigate the factor alloy more thoroughly.
M M, Vrijhoef +2 more
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Creep modeling and creep life estimation of Gr.91
International Journal of Materials Research, 2012Abstract The creep behavior and deciding factors for creep life have been investigated for Gr.91 in the temperature range between 450 and 725°C. The longest time to rupture was 68755 h. The creep life is inversely proportional to the minimum creep rate multiplied by the increase in creep rate by strain in the acceleration region for a ...
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Creep rupture of polymers-a statistical model
International Journal of Solids and Structures, 1997zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Vujosevic, Milena, Krajcinovic, Dusan
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