Effects of microstructure on crack tip fields and fracture toughness in PC/ABS polymer blends

Thomas Seelig*, Erik Van der Giessen

*Bijbehorende auteur voor dit werk

OnderzoeksoutputAcademicpeer review

10 Citaten (Scopus)
425 Downloads (Pure)

Samenvatting

Numerical simulations are performed in order to gain a better understanding of the effects of various microstructural features and toughening mechanisms in amorphous PC/ABS polymer blends. Crack tip loading under global small-scale yielding conditions is considered with the blend microstructure explicitly resolved in the near-tip process zone. Constitutive models are employed which account for large visco-plastic deformations, the characteristic softeningrehardening behavior of glassy polymers, as well as the effect of plastic dilatancy in the ABS phase due to rubber particle cavitation. The influence of blend composition and morphology on the local stress distribution and the development of the plastic zone at a stationary crack tip are analyzed. Furthermore, crack propagation and the evolution of fracture toughness are studied using different cohesive surface models for failure in the different phases of the blend microstructure.

Originele taal-2English
Pagina's (van-tot)205-222
Aantal pagina's18
TijdschriftInternational Journal of Fracture
Volume145
Nummer van het tijdschrift3
DOI's
StatusPublished - jun.-2007

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