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

Francisco Sacchetti, Wouter J.B. Grouve, Laurent L. Warnet (Corresponding Author), Irene Fernandez Villegas

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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
Number of pages11
JournalEngineering fracture mechanics
Volume203
DOIs
Publication statusPublished - Nov 2018

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Laminates
Fracture toughness
Carbon
Cooling
Cantilever beams
Consolidation
Failure modes
Differential scanning calorimetry
Plastic deformation

Cite this

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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.",
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Effect of cooling rate on the interlaminar fracture toughness of unidirectional Carbon/PPS laminates. / Sacchetti, Francisco; Grouve, Wouter J.B.; Warnet, Laurent L. (Corresponding Author); Villegas, Irene Fernandez.

In: Engineering fracture mechanics, Vol. 203, 11.2018, p. 126-136.

Research output: Contribution to journalArticleAcademicpeer-review

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T1 - Effect of cooling rate on the interlaminar fracture toughness of unidirectional Carbon/PPS laminates

AU - Sacchetti, Francisco

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AU - Villegas, Irene Fernandez

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AB - 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.

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