Journal
COMPOSITE STRUCTURES
Volume 242, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compstruct.2020.112035
Keywords
Delamination; Mixed mode; Cohesive zone modeling; Fiber bridging
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Funding
- von Karman fellowship [GS069]
- Alexander von Humboldt Foundation
- Ministry of Innovation, Science and Research of the State of North Rhine-Westphalia
- Space Technology Mission Directorate Composite Technologies for Exploration Project
- Aeronautics Research Directorate Transformational Tools and Technologies Project
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A recently developed cohesive zone traction-separation formulation for mode I facesheet to core disbonding, which includes the effects of fiber bridging in a novel way, is extended to account for mode II and mixed mode delamination. The pure mode I and mode II behavior of the model is calibrated based on traction separation curves which are extracted from Double Cantilever Beam (DCB) and End Notched Flexure (ENF) experiments utilizing the J integral. An existing mixed mode framework, which requires no further parameters, is used to predict the load displacement curves of Mixed ode Bending (MMB) tests. Very close agreement between numerical predictions and experimental results is observed for all demonstrated mixed mode ratios.
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