Experimental Characterization of Mode I Interlaminar Fracture Toughness in Low-Melt Paek Thermoplastic Composite Material

Natália Ribeiro Marinho, Mariano Andrés Arbelo, Francis Gonzalez, Geraldo Mauricio Candido, Maurício V. Donadon, Rita de Cássia Mendonça Sales

Research output: Contribution to conferencePaperpeer-review

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 languageEnglish
Number of pages11
Publication statusPublished - Jan 2019
Externally publishedYes
Event25th ABCM International Congress of Mechanical Engineering, COBEM 2019 - Uberlândia, Brazil
Duration: 20 Oct 201925 Oct 2019
Conference number: 25

Conference

Conference25th ABCM International Congress of Mechanical Engineering, COBEM 2019
Abbreviated titleABCM.COBEM.2019
Country/TerritoryBrazil
CityUberlândia
Period20/10/1925/10/19

Keywords

  • Carbon fiber composites
  • Fracture mechanics
  • Thermoplastics
  • Mode I delamination
  • n/a OA procedure

Fingerprint

Dive into the research topics of 'Experimental Characterization of Mode I Interlaminar Fracture Toughness in Low-Melt Paek Thermoplastic Composite Material'. Together they form a unique fingerprint.

Cite this