Structures made of the thermoplastic polymer polyether ether ketone (PEEK) are widely
used in dynamically-loaded applications due to their high-temperature resistance and high mechanical
properties. To design these dynamic applications, in addition to the well-known stiffness and
strength properties the vibration-damping properties at the given frequencies are required. Depending
on the application, frequencies from a few hertz to the ultrasonic range are of interest here. To
characterize the frequency-dependent behavior, an experimental approach was chosen and applied
to a sample polymer PEEK. The test setup consists of a piezoelectrically driven base excitation of
the polymeric specimen and the non-contact measurement of the velocity as well as the surface
temperature. The beam’s bending vibrations were analyzed by means of the Timoshenko theory
to determine the polymer’s storage modulus. The mechanical loss factor was calculated using the
half-power bandwidth method. For PEEK and a considered frequency range of 1 kHz to 16 kHz, a
storage modulus between 3.9 GPa and 4.2 GPa and a loss factor between 9 103 and 17 103
were determined. For the used experimental parameters, the resulting mechanical properties were
not essentially influenced by the amplitude of excitation, the duration of excitation, or thermal
degrad.ation due to self-heating, but rather slightly by the clamping force within the fixation area.
| Identifer | oai:union.ndltd.org:DRESDEN/oai:qucosa:de:qucosa:87750 |
| Date | 27 October 2023 |
| Creators | Kucher, Michael, Dannemann, Martin, Böhm, Robert, Modler, Niels |
| Publisher | MDPI |
| Source Sets | Hochschulschriftenserver (HSSS) der SLUB Dresden |
| Language | English |
| Detected Language | English |
| Type | info:eu-repo/semantics/publishedVersion, doc-type:article, info:eu-repo/semantics/article, doc-type:Text |
| Rights | info:eu-repo/semantics/openAccess |
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