Loading rate dependency of Mode I interlaminar fracture toughness for unidirectional composite laminates
In: Composites Science and Technology, Jg. 167 (2018-10-01), S. 215-223
Online
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Zugriff:
This study was conducted to investigate the effect of the loading rate on the Mode I interlaminar fracture toughness of unidirectional carbon/epoxy laminates. Double cantilever beam (DCB) test geometry was employed for both quasi-static and dynamic fracture tests. A novel dual electromagnetic Hopkinson bar was employed to load the DCB specimens dynamically and symmetrically with velocities in the range of 10–30 m/s. A hybrid experimental-numerical method was used to determine the interlaminar fracture toughness for both quasi-static and dynamic loading conditions using the virtual crack closure technique (VCCT). The results indicate the presence of a critical loading rate for interlaminar fracture, below which the fracture toughness remains constant and beyond which the fracture toughness increases rapidly. Fractography results suggest that the failure mechanism transitions from a fiber/matrix interface failure under quasi-static loading to a brittle cleavage fracture of the matrix material with microbranching under dynamic loading.
Titel: |
Loading rate dependency of Mode I interlaminar fracture toughness for unidirectional composite laminates
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Autor/in / Beteiligte Person: | Zhang, Chao ; Li, Yulong ; Hailiang, Nie ; Liu, Huifang |
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Zeitschrift: | Composites Science and Technology, Jg. 167 (2018-10-01), S. 215-223 |
Veröffentlichung: | Elsevier BV, 2018 |
Medientyp: | unknown |
ISSN: | 0266-3538 (print) |
DOI: | 10.1016/j.compscitech.2018.07.040 |
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