Quantitative evaluation of indentation-induced densification in glass

Yoshida, Satoshi; Sangleboeuf, Jean‐Christophe; Rouxel, Tanguy

doi:10.1557/jmr.2005.0418

Cited by 236 publications

(302 citation statements)

References 25 publications

Supporting

Mentioning

282

Contrasting

Order By: Relevance

“…In general, both processes, densification and shear flow are sensitive toward changes in strain rate (Shikimaka et al, 2016); the contribution of each, however, depends on composition, atomic packing density, and network connectivity (Yoshida et al, 2005;Limbach et al, 2014;Möncke et al, 2016). Shikimaka et al (2016) concluded densification to be triggered by shear and pressure.…”

Section: The Effect Of Strain Rate On the Deformation Mechanismmentioning

confidence: 99%

Influence of Cooling Rate on Cracking and Plastic Deformation during Impact and Indentation of Borosilicate Glasses

et al. 2017

View full text Add to dashboard Cite

The influence of a changing glass topology on local mechanical properties was studied in a multitechnique nanomechanical approach. The glass response against sharp contacts can result in structural densification, plastic flow, or crack initiation. By using instrumented indentation testing, the mechanical response was studied in different strain rate regimes for a sodium borosilicate glass (NBS) exhibiting altering structures due to varying processing conditions. Comparison with data from former studies and with literature data on other glass structures helped to elucidate the role of the borate and silicate subnetworks and to understand the overall mechanical properties of the mixed glass systems. A peculiarity of some of the NBS glasses tested in this study is the fact that the connectivity of the borate and silicate entities depends on the sample's thermal history. Although the influence on macroscopic material properties such as E and H is minor, the onset of cracking indeed is influenced by those structural changes within the glass. Rapidly quenched glass shows an improved crack resistance, which is even more pronounced at high strain rates. Studies on various processing conditions further indicate that this transition is closely related to the cooling rate around Tg. The strain rate dependence of cracking is discussed in terms of the occurrence of shear deformation and densification.

show abstract

Section: The Effect Of Strain Rate On the Deformation Mechanismmentioning

confidence: 99%

Influence of Cooling Rate on Cracking and Plastic Deformation during Impact and Indentation of Borosilicate Glasses

et al. 2017

View full text Add to dashboard Cite

show abstract

“…This indenter undergoes a moderate displacement in the z direction until the reacting force reaches the desired indentation force. Table 4 presents a comparison between the experimental [8,32] and the present numerical indentation results for low indentation forces (F indent = 0.1 N and F indent = 0.5 N). For F indent = 0.1 N, the DEM simulation yielded a relatively good estimate of the volume of the indentation print V − and the volume of the piled-up material around the indenter V + .…”

Section: Vickers Indentationmentioning

confidence: 99%

Simulation of Vickers indentation of silica glass

Jebahi

Debenath

Dau

et al. 2013

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. AbstractThe indentation response of glasses can be classified under three headings: normal, anomalous and intermediate, depending on the deformation mechanism and the cracking response. Silica glass, as a typical anomalous glass, deforms primarily by densification and has a strong tendency to form cone cracks that can accompany median, radial and lateral cracks when indented with a Vickers tip. This is due to its propensity to deform elastically by resisting plastic flow. Several investigations of this anomalous behavior can be found in the literature. The present paper serves to corroborate these results numerically using the discrete element method. A new pressuredensification model is developed in this work that allows for a quantitative estimate of the densification under very high pressure. This model is applied to simulate the Vickers indentation response of silica glass under various indentation forces using the discrete element method first, and then a discrete-continuum coupling method with large simulation domains to suppress the side effects and reduce the computational time. This coupling involves the discrete element method (DEM) and the constrained natural element method (CNEM). The numerical results obtained in this work compare favorably with past experimental results.

show abstract

“…In that respect glasses do not differ from standard materials, except that the characteristic length scale below which volume deformation (plasticity) is energetically more favorable than surface creation (crack propagation) is smaller [3]. Although known for half a century [4] and of primary interest for many micron-scale applications, the plasticity of silicate glasses has up to now remained little studied [5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%