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Calibrating a fiber–matrix interface failure model to single fiber push-out tests and numerical simulations

Rohrmüller, Benedikt ORCID iD icon 1; Gumbsch, Peter 1; Hohe, Jörg
1 Karlsruher Institut für Technologie (KIT)


To characterize the fiber–matrix interface of a glass-fiber reinforced sheet molding compound (SMC), single-fiber push-out tests are performed and simulated numerically. The parameters of a cohesive zone model for the interface are calibrated on the single-fiber push-out tests. The fracture-toughness/energy release rate therein is determined from cyclic (loading–unloading) experiments. The matrix model, consisting of the nonlinear-elastic Neo-Hooke law with a Prony series to model viscoelastic behavior, is calibrated with data from nanoindentation tests by adjusting simulation curves to their experimental counterparts. Using the calibrated model of the single-fiber push-out, the influence of neighboring fibers and thermally induced residual stresses is shown. The interface damage initiates in the single-fiber push-out test at the indented fiber at positions closest to other fibers under the surface. In addition this is the position where the radially largest fiber expansion due to the Poisson effect is found. The results reveal that although the push-out test is simple to perform, the interpretation of its results might be a complicated task.

Verlagsausgabe §
DOI: 10.5445/IR/1000138656
Veröffentlicht am 07.10.2021
DOI: 10.1016/j.compositesa.2021.106607
Zitationen: 9
Web of Science
Zitationen: 6
Zitationen: 6
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Angewandte Materialien – Computational Materials Science (IAM-CMS)
Publikationstyp Zeitschriftenaufsatz
Publikationsjahr 2021
Sprache Englisch
Identifikator ISSN: 1359-835X, 1878-5840
KITopen-ID: 1000138656
Erschienen in Composites Part A: Applied Science and Manufacturing
Verlag Elsevier
Band 150
Seiten Art.-Nr.: 106607
Nachgewiesen in Dimensions
Web of Science
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