Abstract
Mode I fracture is one of the most widely studied fracture modes in fiber-reinforced polymer structuralcomposites research. On the other hand, fracture properties of thermoplastic structural composites have not beenstudied extensively. This paper presents the determination of opening Mode I strain energy release rate (GI) for areinforced thermoplastic laminate made by a semipreg plain-5H satin weave fabric and a semi-crystalline engineeredpolyarlyetherketone (PAEK) resin. Interlaminar fracture toughness was calculated based on Modified Beam Theory(MBT) method considering a perfectly built-in double cantilever beam. Experimental procedure and calculations tocharacterize Mode I interlaminar fracture toughness was performed according to Double Cantilever Beam (DCB) testmethod described in ASTM D5528-13 using end blocks to introduce opening forces. Comparisons with analyticalsolution using simple beam theory analysis was carried out to verify the obtained results. Finally, a fractographyanalysis was carried out in the tested samples to determine the failure mechanisms involved during the fractureprocess. Results demonstrated that thermoplastic composites usually present enhanced fracture toughness compared tothermosets. This improved fracture behavior is justified mainly due to the higher fracture resistance of crystallinepolymers in comparison to amorphous polymers.
Original language | English |
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Number of pages | 11 |
Publication status | Published - Jan 2019 |
Externally published | Yes |
Event | 25th ABCM International Congress of Mechanical Engineering, COBEM 2019 - Uberlândia, Brazil Duration: 20 Oct 2019 → 25 Oct 2019 Conference number: 25 |
Conference
Conference | 25th ABCM International Congress of Mechanical Engineering, COBEM 2019 |
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Abbreviated title | ABCM.COBEM.2019 |
Country/Territory | Brazil |
City | Uberlândia |
Period | 20/10/19 → 25/10/19 |
Keywords
- Carbon fiber composites
- Fracture mechanics
- Thermoplastics
- Mode I delamination
- n/a OA procedure