Title: Inferring the degradation of pultruded composites from dynamic nonlinear resonance measurements
Authors: Van Den Abeele, Koen ×
Van de Velde, K
Carmeliet, Jan #
Issue Date: Jan-2001
Publisher: Soc plastics eng inc
Series Title: Polymer composites vol:22 issue:4 pages:555-567
Abstract: The chemical resistance of pultruded polyester composites to various chemical immersion solutions is investigated as a function of the exposure time, and the observations from static tests are compared with the results from nonlinear dynamic vibration experiments. The mechanical properties were measured according to ASTM standards, both in flexural and tensile tests. Barcol hardness and sorption measurements provide complementary information. In addition, a novel nondestructive (NDE) method, called Single Mode Nonlinear Resonance Acoustic Spectroscopy (SIMONRAS), was applied to measure the linear and nonlinear dynamical properties of the samples as a function of exposure time. This new NDE method focuses on the strain amplitude dependence of the resonance frequency while driving a sample at relatively low excitation levels. The obtained relative frequency shift is a measure of the internal microstructural properties of the material. The con-elation between this nonlinearity parameter and the mechanical properties is extremely good, which implies that the SIMONRAS technique can be applied to predict the chemo-mechanical degradation of composites in a nondestructive manner.
ISSN: 0272-8397
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Building Physics Section
Physics, Campus Kulak Kortrijk
× corresponding author
# (joint) last author

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