Numerical analysis of delamination initiation and propagation in the CFRP laminates ith mechanical couplings in the DCB test configuration
Fragment książki (Abstrakt)
| Status: | |
| Autorzy: | Dębski Hubert, Samborski Sylwester |
| Dyscypliny: | |
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| Wersja dokumentu: | Elektroniczna |
| Język: | angielski |
| Efekt badań statutowych | NIE |
| Materiał konferencyjny: | NIE |
| Publikacja OA: | NIE |
| Abstrakty: | angielski |
| Numerical calculations performed in the Finite Element (FE) codes enable pre-experimental analyses of test configurations applied to uncommon materials. In the field of the Continuous Fiber Reinforced Plastics (CFRP) laminates their mode I delamination resistance can be determined in the Double Cantilever Beam (DCB) test. Direct application of the DCB configuration to non-unidirectional laminates must be performed with care, the more mechanical couplings can occur in composites with general ply layups. The couplings can influence both the initial delamination front shape and the way of its propagation, which can be neither self-similar nor symmetrical. By considering different couplings a number of DCB beam models were elaborated and resolved in the ABAQUS FE environment with its Virtual Crack Closure Technique (VCCT) and Cohesive Zone Model (CZM) facilities. The results for the Strain Energy Release Rate (SERR) revealed possible delamination mode mixities, skewness in the SERR distributions along delamination front and possibilities of non-self-similar propagation. The models were constructed with conformity with the ASTM 5528-D Standard, as the current study tries to verify the practical applicability of the DCB test configuration in case of non-unidirectional laminates. The DCB test is based on the beam theory or the compliance calibration method. It fulfills the assumptions of the Linear Elastic Fracture Mechanics (LEFM). The numerical models of the laminated beam conformed with the Classical Lamination Theory (CLT). The research was financially supported by the Ministerial Research Project No. DEC-2016/21/B/ST8/03160 financed by the Polish National Science Centre. |
