About this Abstract |
Meeting |
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Symposium
|
2024 ASC Technical Conference, US-Japan Joint Symposium, D30 Meeting
|
Presentation Title |
Experimental Measurement of Mode-I and Mode-II Traction Separation Laws for Delamination in Plain-Weave Glass Epoxy Composites |
Author(s) |
Paul D. Samuel, Sagar M. Doshi, Aristedes Yiournas, John W. Gillespie Jr. |
On-Site Speaker (Planned) |
Paul D. Samuel |
Abstract Scope |
During low velocity impact on thin and thick-section laminated composites, interlaminar delamination (separation of layers) occurs at the interface between layers which is weaker than the rest of the composite structure. The size and number of delaminated surfaces affects the residual stiffness and the load-bearing capacity of the laminate. Cohesive zone modeling (CZM) is an effective approach to predict delamination through experimentally measured traction separation laws (TSL) and can be integrated along with predictive models for intralaminar damage in composites. In this paper, the traction separation laws for plain weave (5x5) 24 oz/yd2 S2 glass SC15 epoxy composite are measured for the initiation and propagation of delamination in Mode-I and Mode-II. The J-integral-based approach is used to determine the fracture toughness, and crack displacements are measured using an accuracy-driven instrumentation setup with Digital Image Correlation(DIC). The energy release rates factoring local mechanisms are investigated and compared with those considering assumptions of linear-elastic behavior. The fracture properties (peak traction, initial stiffness, and fracture toughness) will be used as input to cohesive zone models (CZM) in LS-DYNA and verified. |
Proceedings Inclusion? |
Definite: Post-meeting proceedings |