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- W2037133544 abstract "Beton weist unter kurzzeitdynamischer Einwirkung in einigen Kennwerten veränderte Eigenschaften gegenüber statischer Einwirkung auf. Beispielsweise steigt die Festigkeit mit der Verzerrungsgeschwindigkeit, oder es tritt ein extrem nichtlineares volumetrisches Materialverhalten bei hohen Drücken charakterisiert durch die Hugoniot-Eigenschaften auf. Zustandsgleichungen für poröse Materialien beschreiben dieses thermo-mechanische Materialverhalten unter Stoßbelastung. In Werkstoffgesetzen sind diese “hochdynamischen” Eigenschaften einzubinden. Bekannte Ansätze aus der Kontinuumsschädigungsmechanik, der Plastizitätstheorie oder der verschmierten Beschreibung von Rissen können hierbei als Basis verwendet werden. Der folgende Aufsatz beschreibt in Kürze wichtige Elemente der Werkstoffformulierung von Beton und bewertet diese hinsichtlich ihrer Verwendung in der Kurzzeitdynamik. Constitutive Equations of Concrete for the Application in the High-Speed Dynamics Under high speed loading concrete exhibits material properties that are different from that for static loading. Basically, these are the strength increases at high strain rates and the nonlinear volumetric behaviour characterized by Hugoniot properties. Nonlinear Equation of states describe this thermo-mechanical material behaviour under shock loading. For concrete and other porous materials a permanent density change occurs. This is because of the closure of pores through the high amplitude of the loading. In constitutive equations used for high speed dynamic applications these “high dynamic” properties have to be included. Wellknown theories from continuum damage mechanics (CDM), plasticity or smeared crack models can be used as a basis. In this article elements of constitutive equations are described and an evaluation of the applicability in the speed dynamics is given." @default.
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- W2037133544 date "2007-11-01" @default.
- W2037133544 modified "2023-10-17" @default.
- W2037133544 title "Elemente der Werkstoffformulierung für Beton und deren Verwendung in der Kurzzeitdynamik" @default.
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- W2037133544 doi "https://doi.org/10.1002/best.200700581" @default.
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