Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 138, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2020.106057
Keywords
Polymer-matrix composites (PMC); Fracture; Impact behaviour; Mechanical testing; Hopkinson Pressure Bar
Funding
- SUBARU CORPORATION
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Transverse compression tests on a unidirectional composite were performed under quasi-static and high-rate loading conditions using servo-hydraulic machines as well as a direct impact Hopkinson bar. Aside the expected increase of compressive strength with increasing loading rate, a change of fracture plane orientation was observed. For quasi-static loading conditions, the fracture angle was 54.5 degrees, for high rate-loading conditions this increased to 65 degrees. Assuming a Mohr-Coulomb type of fracture for unidirectional composites under transverse compression loading, the change of fracture plane orientation indicates a rate dependency of the internal friction angle phi, which has not previously been reported for composite materials.
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