Debond fracture characterization in sandwich composites under arctic low temperature conditions

• Main Authors: Farshidi, Arash, Berggreen, Christian
• Format: Conference Object
• Language: English
• Published: 2017
• Subjects: Ceramics and Composites; Foam core; Low temperature; Mixed-mode fracture; MMB; Sandwich composites; Arctic
• Online Access: https://orbit.dtu.dk/en/publications/f9321bf1-ebd3-4f9a-aaf2-ce146dc27455; https://backend.orbit.dtu.dk/ws/files/158708541/4015.pdf

Mixed-mode I/II fracture characterization and measurements of low temperature fracture properties for typical naval type sandwich material configurations has been carried out using the mixed mode bending (MMB) test fixture inside a state-of-the-art climatic chamber facility. The developed test methodology is utilized to measure mixed mode fracture toughnesses as well as crack propagation speeds (da/dN) vs. cyclic energy release rate data, investigating and comparing ambient and low temperature face/core fracture behaviour at different mode-mixities in Navy type sandwich composites. Sandwich specimens were manufactured using H100 PVC foam cores and E-glass/Epoxy face sheets. All specimens were pre-cracked in order to define a sharp crack front.