This work aims at investigating the fracture behaviour of polyacrylamide hydrogels, which have been chosen for their ideal hyperelastic response and their widespread engineering and biomedical applications. The applicability of the energy separation principle to this class of hydrogels is analysed. This principle allows identifying the fracture initiation without visual monitoring of the specimen and to calibrate the geometry factor required to estimate the fracture toughness. Such innovative approach is compared to established methods: (i) single specimen methods, based on the determination of the energy release rate, for the calculation of fracture toughness; (ii) a multi-specimen methodology for the calibration of the geometry factor. Results show that the energy separation principle is valid for this class of hydrogels, and it can provide a toughness parameter corresponding to a small crack advancement.

Fracture characterization of hyperelastic polyacrylamide hydrogels

Agnelli, S.
;
Baldi, F.;Bignotti, F.;Salvadori, A.;Peroni, I.
2018-01-01

Abstract

This work aims at investigating the fracture behaviour of polyacrylamide hydrogels, which have been chosen for their ideal hyperelastic response and their widespread engineering and biomedical applications. The applicability of the energy separation principle to this class of hydrogels is analysed. This principle allows identifying the fracture initiation without visual monitoring of the specimen and to calibrate the geometry factor required to estimate the fracture toughness. Such innovative approach is compared to established methods: (i) single specimen methods, based on the determination of the energy release rate, for the calculation of fracture toughness; (ii) a multi-specimen methodology for the calibration of the geometry factor. Results show that the energy separation principle is valid for this class of hydrogels, and it can provide a toughness parameter corresponding to a small crack advancement.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/11379/508682
 Attenzione

Attenzione! I dati visualizzati non sono stati sottoposti a validazione da parte dell'ateneo

Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 15
  • ???jsp.display-item.citation.isi??? 13
social impact