MaterialsWeek 2021
Lecture
08.09.2021 (CEST)
Numerical Modelling of Low-Velocity-Impact and Compression-After-Impact of CFRP at Elevated Temperatures
BF

Prof. Dr. Bodo Fiedler

Technische Universität Hamburg

Fiedler, B. (V)¹; Junge, N.¹; Körbelin, J.¹; Skrzypczak, M.¹
¹
Vorschau
24 Min. Untertitel (CC)

In this study, temperature-dependent material properties are implemented into a continuum-damage-based (CDM) model to describe the progressive failure of CFRP under temperature influence. Low-velocity impact (LVI) simulations showed that the material model could accurately represent the damage resulting from LVI at different temperatures and impact energies. The simulations show that an increase of the interlaminar energy release rate (EER) does not cause the reduction in delamination size, but the change in intralaminar damage and overall structural response. Compression after impact (CAI) simulations are in good agreement with experimental data. The results emphasize that an increased temperature during compression has a more decisive influence on residual strength than the impact of energy. The proposed approach and CDM model can predict the material behavior of CFRP under temperature influence and complex load cases.

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