Fracture process zone on mode II fatigue delamination dataset

When citing or reusing this dataset, please use the following reference for proper attribution and traceability: Birnie et al. (2026), Fracture process zone on mode II fatigue delamination dataset, DOI: 10.5281/zenodo.18640627 Description: This dataset contains Mode II fatigue delamination data for unidirectional carbon fibre-reinforced polymer (CFRP) laminates (T700-DT120 from Delta Preg S.p.A). Testing was performed via End-Loaded Split (ELS) specimens according to ISO 15114:2014 across different displacement ratios (R). Files include: Raw data from the testing machine: Force and Displacement. Post-processed 2D and 3D Digital Image Correlation (DIC) data, from the side and top of the specimen, respectively: crack lengths (true and effective). Effective crack length from measured compliance. Process Zone Length calculated by combining 2D and 3D DIC crack lengths. This dataset was used for the publication of: Birnie, J., Biagini, D., Falaschetti, M. P., Monticeli, F., Pascoe, J.-A., & Troiani, E. (2026). Influence of R-ratio and fracture process zone development on mode II fatigue delamination. Composites Part B: Engineering, 319, 113688. https://doi.org/10.1016/j.compositesb.2026.113688 The research was financed by the European Union---NextGenerationEU through the Italian Ministry of University and Research under PNRR---Mission 4 Component 1, Investment 4.1 “Extension of the number of PhD programmes and innovative PhD programmes for Public Administration and cultural heritage” and Investment 3.4 “Advanced university education and skills–Support to PhD programmes for digital and environmental transition” (CUP: J33C23002650002).