Multi-scale approach of the instrumented indentation technique on the fracture toughness estimation
dc.contributor.author
hal.structure.identifier | MEJIAS, A
|
dc.contributor.author
hal.structure.identifier | CHICOT, Didier
|
dc.contributor.author
hal.structure.identifier | DECOOPMAN, Xavier
|
dc.contributor.author
hal.structure.identifier | ROUDET, Francine
|
dc.contributor.author | IOST, Alain |
dc.contributor.author
hal.structure.identifier | MONTAGNE, Alex
|
dc.date.accessioned | 2016 |
dc.date.available | 2016 |
dc.date.issued | 2015 |
dc.date.submitted | 2015 |
dc.date.submitted | 2016 |
dc.identifier.uri | http://hdl.handle.net/10985/10875 |
dc.description.abstract | Instrumented Indentation Technique (IIT) is widely used to determine the mechanical properties of materials. The elastic modulus is usually determined by applying the methodology proposed by Oliver and Pharr [1] who supposed that its value is independent of the indentation depth. However, some authors [2, 3] have observed a decrease of the elastic modulus when the indenter displacement increases which allowed them to introduce a continuous damage theory used afterwards to estimate the fracture toughness of ductile materials. The assumption made by the authors is that a damage in the region very close to the bottom of the indent results in the formation of microvoids which leads to the variation of the elastic modulus as a function of the indenter displacement. Starting from this observation, Lee et al. [2] proposed an energy model based on the Griffith’s theory and the continuous damage mechanics (CDM) which states that the elastic modulus variation is related to the fraction void volume through a variable damage, introduced by Kachanov [4], related to the surface density of the microdefects. On the other hand, the works carried out over ductile materials by Li et al. [3] have been performed only with nanoindentation data preventing a discussion on the scale-‐effect. (...) |
dc.language.iso | en |
dc.publisher | SF2M |
dc.rights | Post-print |
dc.subject | Fracture Thoughness |
dc.subject | Continuous damage theory |
dc.subject | Multi-scale indentation |
dc.title | Multi-scale approach of the instrumented indentation technique on the fracture toughness estimation |
dc.typdoc | Communication sans acte |
dc.localisation | Centre de Lille |
dc.subject.hal | Sciences de l'ingénieur: Matériaux |
dc.subject.hal | Sciences de l'ingénieur: Mécanique: Mécanique des matériaux |
ensam.audience | Non spécifiée |
ensam.conference.title | Indentation 2014 |
ensam.conference.date | 2014-12 |
ensam.country | France |
ensam.city | Strasbourg |
ensam.peerReviewing | Oui |
ensam.invitedCommunication | Non |
ensam.proceeding | Oui |
hal.identifier | hal-01326987 |
hal.version | 1 |
hal.status | accept |