Effect of cooling rate on the interlaminar fracture toughness of unidirectional Carbon/PPS laminates

Francisco Sacchetti, Wouter J B Grouve, Laurent L. Warnet, Irene Fernandez Villegas

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)

Abstract

The effect of cooling rate on the interlaminar fracture toughness of Carbon reinforced PPS laminates was investigated experimentally. A typical stamp forming process was utilised in a novel manner to achieve high average cooling rates, of up to 3500 °C/min, while ensuring a good consolidation quality. Differential scanning calorimetry measurements were used to characterise the degree of crystallinity of the samples, while the interlaminar fracture toughness of the laminates was characterised under mode I using the Double Cantilever Beam test. Finally, micrographic analysis of the fracture surfaces was carried out to correlate the degree of crystallinity to the failure modes. A strong correlation between fracture toughness and degree of crystallinity was found. The samples with a low degree of crystallinity showed a high interlaminar fracture toughness and large plastic deformation of the matrix during fracture.

Original languageEnglish
Pages (from-to)126-136
JournalEngineering Fracture Mechanics
Volume203
DOIs
Publication statusPublished - 2018

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