Doctoral Researcher
Enrico Wölfel

Strain-rate dependent composite behavior of fiber reinforcement in mineral-based matrices

A2 Fiber-matrix bond© Leibniz Institute of Polymer Research Dresden

From left to right: SEM image – PVA initial fiber before and after finish extraction; High-dynamic pull-out; PVA initial fiber/concrete - Comparison quasi-static and high-dynamic pull-out

The aim of this project is the achievement of the fundamental understanding of the damaging mechanisms in fiber-matrix interphases during low and high-rate loading. In particular, the processes leading from fiber debonding to fiber failure are in the focus. From the perspective of material science, the role of the fiber material itself, the nature of the fiber surface and the structure of the mineral-based matrix in the boundary layer of impact-resistant concrete composites should be clarified.

Furthermore, concepts for a tailored interphase design to increase the impact resistance of fiber-reinforced concrete need to be developed.

Publications
Scheffler, C., Zhandarov, S., Wölfel, E., Mäder. E., 2017. Interphases in Cementitious Matrix: Effect of Fibers, Sizings, and Loading Rates. In Mechtcherine et al. (eds.) Fourth International Conference on Strain-Hardening Cement-Based Composites SHCC4, 18-20 September, 2017, Dresden, Germany; pp.275-283.

Wölfel, E., Scheffler, C., Curosu, I., Mechtcherine, V., 2108. Single Fibre Pull-Out Tests of Polypropylene and Glass Fibres in Cement-Based Matrices at High Loading Rates. Proceedings ECCM18 - 18th European Conference on Composite Materials, 24-28 June, 2018, Athens, Greece; pp. 1-8 (published online).

Wölfel, E., Scheffler, C., 2019. Interphases in polypropylene and glass fiber reinforced cementitious model composites under dynamic loading. In Pijaudier-Cabot et al. (eds.) 10th International Conference on Fracture Mechanics of Concrete and Concrete Structures FraMCoS-X, 23-26 June, 2019, Bayonne, France.

03. – 05.02.2020
Third GRK2250/1 Workshop

Call for Applications

There are 11 open vacancies for doctoral researchers for the second cohort of the project - GRK 2250/2, which will start in May 2020. Interested and motivated candidates are welcome to apply before 13.12.2019. More detailed information can be found here.

Contact


TU Dresden
Institute of Construction Materials
01062 Dresden, Deutschland
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