Print Email Facebook Twitter A fatigue test based on inclined loading block concept to benchmark delamination growth considering loading history and R-curve effect Title A fatigue test based on inclined loading block concept to benchmark delamination growth considering loading history and R-curve effect Author Leciñana, I. (Basque Research and Technology Alliance (BRTA); University of Girona) Renart, J. (University of Girona; Generalitat de Catalunya) Carreras, L. (University of Girona) Turon, A. (University of Girona) Zurbitu, J. (Basque Research and Technology Alliance (BRTA)) Tijs, B.H.A.H. (TU Delft Group De Breuker; Fokker/GKN Aerospace) Date 2024 Abstract The main objective of this paper is to present a delamination benchmark test concept for composite materials that develop non-self-similar delamination in characterization specimens. The non-self-similar delamination is induced by rotating the loading blocks. The simplicity of the test allows for analyzing the loading mode history by concatenating different loading conditions, such as static and fatigue loading, under multiple loading modes. The methodology introduced in this paper can be particularized for any given composite material set and any sequence of loading conditions. To demonstrate the capabilities of the benchmark test, a case study is presented using AS4D/PEKK-FC thermoplastic composite material, which exhibits strong R-curve behavior. A sequence of opening and shear failure modes was applied under static and fatigue loading, providing an experimental data set that is ready to be used as a part of the validation of numerical predictive delamination models. The delamination process was monitored by X-ray radiography, and the final fracture surfaces were analyzed with scanning electron microscopy (SEM), giving a physical insight into the contribution of the fracture mechanisms to the delamination process. Subject Benchmark validation testDelamination process zoneFatigueLoading historyR-curve effect To reference this document use: http://resolver.tudelft.nl/uuid:a928473c-d020-43d2-8df7-6bf4f1b77656 DOI https://doi.org/10.1016/j.compositesa.2024.108128 ISSN 1359-835X Source Composites Part A: Applied Science and Manufacturing, 181 Part of collection Institutional Repository Document type journal article Rights © 2024 I. Leciñana, J. Renart, L. Carreras, A. Turon, J. Zurbitu, B.H.A.H. Tijs Files PDF 1-s2.0-S1359835X24001258-main.pdf 5.92 MB Close viewer /islandora/object/uuid:a928473c-d020-43d2-8df7-6bf4f1b77656/datastream/OBJ/view