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- W1998812365 abstract "Numerical simulations require the determination of material constants associated to a given mathematical material model that accurately represents its mechanical behavior. Furthermore, for dynamic models, the characterization process should be accomplished at high strain rates since the mechanical properties of some materials are influenced by the rate of loading. This pressure-dependant behavior is commonly seen in paste-like materials such as oil-based modeling clay. This material, is widely used as simulating a material for analyzing metal forming processes, in impact applications as soft body impactor, or as backing material in ballistic resistance testing of body armors. There are many techniques used for characterizing these kinds of pastelike materials. Traditional quasi-static tests, such as compression or indentation, are the most commonly used, although, high strain rate techniques, such as the drop-impact test, are also used when dynamic properties are required. This paper presents the mechanical characterization of an oil-based modeling clay by two different techniques: quasi-static and a high strain rate technique. The results of a traditional quasi-static method, using compression tests, are compared with the constants determined by a proposed high strain rate characterization procedure that uses as input a single drop-impact test. Both sets of material constants are implemented in a numerical simulation that uses the power law plasticity material model. Drop impact numerical simulations and their verification against experimental results were performed to compare the accuracy of both sets of material constants and the suitability of the characterization techniques. Results illustrate that the proposed high strain rate characterization technique show advantages in the determination of the materials constants for the numerical simulation of dynamic events." @default.
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- W1998812365 date "2011-01-01" @default.
- W1998812365 modified "2023-09-25" @default.
- W1998812365 title "Quasi-Static and Dynamic Characterization of Oil-Based Modeling Clay and Numerical Simulation of Drop-Impact Test" @default.
- W1998812365 doi "https://doi.org/10.1115/imece2011-63883" @default.
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