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Characterizing Materials in the Frequency Domain: Validation Experiments
Author(s) -
Katzmann né Sauer Josef,
Musialak Jana,
Steeb Holger
Publication year - 2019
Publication title -
pamm
Language(s) - English
Resource type - Journals
ISSN - 1617-7061
DOI - 10.1002/pamm.201900362
Subject(s) - stiffness , amplitude , materials science , scaling , displacement (psychology) , actuator , acoustics , harmonic , micrometer , characterization (materials science) , range (aeronautics) , noise (video) , structural engineering , mechanical engineering , computer science , composite material , engineering , physics , nanotechnology , optics , electrical engineering , psychology , geometry , mathematics , psychotherapist , image (mathematics) , artificial intelligence
High Performance Concrete (HPC) and Ultra High Performance Concrete (UHPC) achieve an effective stiffness or strength which allows constructing highly stressed buildings. Following, we present a mechanical characterization technique for HPC and UHPC, using harmonic excitations from 0.1 Hz up to 1 kHz and displacement amplitudes in the micrometer range. The small‐amplitude excitations are performed by a high‐performance piezo‐electric actuator. To validate the experimental workflow, we characterize the mechanical behaviour of Polymethylmethacrylat (PMMA). In this contribution, we present results gained with two different cylindrical sample sizes. By this comparison we shall ensure that geometrical scaling of samples has no influence on the rheological results of the experiments, apart from a change in Signal‐to‐Noise ratio.