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  • 1
    Electronic Resource
    Electronic Resource
    Palo Alto, Calif. : Annual Reviews
    Annual Review of Materials Research 24 (1994), S. 293-320 
    ISSN: 0084-6600
    Source: Annual Reviews Electronic Back Volume Collection 1932-2001ff
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 23 (1990), S. 457-460 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 23 (1990), S. 461-465 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 17 (1984), S. 65-68 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Résumé On suggère une équation d'évolution non linéaire de la détérioration en vue de prédire la résistance ultime en fatigue du béton non armé soumis à un chargement séquentiel d'amplitude constante. Cette approche paraît éliminer l'aspect dissipatif de la loi linéaire de dététérioration (hypothèse de Miner) et elle repose sur la forme observée de la relation de croissance de la détérioration. Aux fins de calcul en relation avec l'aptitude au service des structures de béton armé, on a développé une simple relation non linéaire qui relie les augmentations de flèche et les largeurs de fissures avec le taux de sollicitation cyclique. Les résultats se rapprochent des données expérimentales.
    Notes: Abstract Nonlinear damage evolution equation is suggested to predict fatigue life of plain concrete subjected to sequential, constant amplitude loading. This approach seems to eliminate the nonconservative aspect of the linear damage law (the Miner hypothesis) and is based on the observed shape of the damage growth relationship. For serviceability based design of reinforced concrete structures, a simple nonlinear relationship is developed to relate the increases in deflection and crack width with the cycle-ratio. The results compare favorably with experimental data.
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 19 (1986), S. 297-321 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Type of Medium: Electronic Resource
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  • 6
    Electronic Resource
    Electronic Resource
    Springer
    Materials and structures 28 (1995), S. 83-91 
    ISSN: 1359-5997
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying
    Description / Table of Contents: Resume On a étudié l'effet d'arrachement, à différentes vitesses de glissement, de fibres scellées dans une matrice de ciment. On a établi un système de mesure pour le ‘pendule Charpy’, qui permet d'utiliser deux méthodes indépendantes pour évaluer l'arrachement des fibres du ciment. On a essayé deux séries d'éprouvettes de 16 et 8 fibres, et on a examiné l'effet de la vitesse de glissement et du nombre de fibres. On propose un modèle théorique basé sur la mécanique de la rupture, qui prédit l'effet de la vitesse de glissement sur l'arrachement des fibres. Le modèle proposé, qui s'appuie sur la force maximale d'arrachement des fibres d'un modéle de référence à faible vitesse, peut prédire les forces maximales d'arrachement ainsi que les déplacements correspondant à des vitesses de glissement supérieures.
    Notes: Abstract A study on steel fibres pulled out from a cementitious matrix at different slip rates was conducted. A measurement system, which allows one to use two independent methods to evaluate pull-out load, was developed for the Charpy pendulum. Two series of specimens, with 16 and 8 fibres, respectively, were tested. Effects of the rate of slip and of numbers of fibres on interfacial behaviour have been examined. A theoretical model to predict the slip-rate effect on fibre pull-out has been proposed based on fracture mechanics. Based on the peak fibre pull-out load of a reference specimen with a static slip-rate, the proposed model can predict peak pull-out loads and corresponding slips at faster slip-rates.
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  • 7
    Electronic Resource
    Electronic Resource
    Springer
    Rock mechanics and rock engineering 21 (1988), S. 139-148 
    ISSN: 1434-453X
    Source: Springer Online Journal Archives 1860-2000
    Topics: Architecture, Civil Engineering, Surveying , Geosciences
    Type of Medium: Electronic Resource
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  • 8
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Notched concrete beams containing varying amounts of pea gravel aggregate were tested under three-point bend, and their fracture toughness determined. The roughness of the region near the interface between the cement paste and the aggregate was evaluated by digitizing images from a confocal tandem scanning microscope. The average roughness of the paste was found to be related to the fracture parametersK IC (critical stress intensity factor) and Δa c (critical crack extension), as determined by the two-parameter fracture model. The roughness in the proximity of the paste-aggregate interface was generally higher than that of the paste far from the aggregate, and it decreased with the distance from the aggregate. This study indicates that aggregate particles increase the toughness of the cement paste portion of concrete, and that this is an important mechanism for toughening concrete.
    Type of Medium: Electronic Resource
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  • 9
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 28 (1993), S. 3879-3884 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract Confocal microscopy provides a convenient means of acquiring three-dimensional descriptions of objects. A new technique exploits the capability of confocal microscopy to quantify rough surfaces. The microscope “optically” sections the surface, and a computer transforms a series of sections into digital images and a topographic map. Using a straightforward algorithm, the computer analyses the topographic map to derive a roughness parameter that characterizes the texture of the surface.
    Type of Medium: Electronic Resource
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  • 10
    Electronic Resource
    Electronic Resource
    Springer
    Journal of materials science 21 (1986), S. 953-957 
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract A simple model is proposed to predict the ultimate tensile strength of fibre-reinforced composites when the failure is governed by fibre debonding. The theoretical analysis is based on the concept of fracture mechanics where the debonded zone is considered as an interfacial crack. The analysis is first applied to the classical pull-out test in order to determine the specific work of interfacial cracking. Using this value, the uniaxial tensile strength of the composites can be predicted from an approximate, closed-form equation proposed here. The theoretically predicted results seem to compare favourably with experimental values for fibrere-inforced cement based composite.
    Type of Medium: Electronic Resource
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