Thermo-mechanical characterization of glass at high temperature using the cylinder compression test. Part II: No-slip experiments, viscoelastic constants, and sensitivity

Joshi, Dhananjay; Mosaddegh, Peiman; Musgraves, J. David; Richardson, Kathleen; Joseph, Paul

doi:10.1122/1.4817435

Cited by 11 publications

(29 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…That is, the unaddressed frictional disturbances (in Cases 1 and 2) have been implicitly involved in the determination of the shear relaxation moduli G I (t) and G II (t) (Figure 6). 15 Nevertheless, compared to the shear relaxation, the bulk response herein is not dominant for this type of moldable glass (L-BAL42), as evident in Figure 8A Evidences of such friction-induced error can be found in Zhou et al's 9 and Sarhadi et al's 29 researches where the simulated creep displacements of the glasses are all smaller than the tested ones under constant loads.…”

Section: Numerical Reproduction Of the Cctsmentioning

confidence: 75%

“…As far as viscoelastic characterization is concerned, there are currently several methods that are based on the creep behavior of glass, such as compression creep test (CCT), [14][15][16][17] bending creep test, 18,19 and indentation creep test. As far as viscoelastic characterization is concerned, there are currently several methods that are based on the creep behavior of glass, such as compression creep test (CCT), [14][15][16][17] bending creep test, 18,19 and indentation creep test.…”

mentioning

confidence: 99%

“…As far as viscoelastic characterization is concerned, there are currently several methods that are based on the creep behavior of glass, such as compression creep test (CCT), [14][15][16][17] bending creep test, 18,19 and indentation creep test. 14,15 Based on CCTs, high-temperature viscous and elastic parameters of many types of glasses, such as As 2 S 3 , BK7, and SK5, were successfully measured. 14,15 Based on CCTs, high-temperature viscous and elastic parameters of many types of glasses, such as As 2 S 3 , BK7, and SK5, were successfully measured.…”

mentioning

confidence: 99%

“…12,13,28 Considering the temperature dependence, Sarhadi et al evaluated the glass-mold interface friction through ring compression tests at several temperatures. 14,15 However, no other experimental attempts have been made to slash the interface friction in CCTs of glass, where the quantification of interface friction would be highly instructive to the selection of interface materials with less friction. 29 Using cylinder compression tests, Zhou et al investigated the interface friction between the graphene-coated silicon and glass BK7, and the best matching friction coefficient was determined as 0.20-0.25 at 660-700°C.…”

mentioning

confidence: 99%

See 3 more Smart Citations

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

Luo

Zhang

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

Compression creep tests (CCTs) have been widely used in phenomenological characterization of viscoelastic materials such as glasses. However, disturbed by specimen‐tool interface friction, the real stress‐strain data regarding the pure viscoelastic deformation are frequently misestimated in conventional CCTs, causing decreased accuracies of the derived viscoelastic parameters. This study proposes a comprehensive CCT‐based approach to develop a viscoelastic model with weakened frictional disturbance and enhanced predictive accuracy. An integrated calculation procedure is first built to mathematically characterize the frictional and viscoelastic behaviors of glass during compression. Uniaxial CCTs of a typical borosilicate glass (L‐BAL42) are then performed at varied frictional conditions. The quantified coefficients of interface friction indicate that a minor frictional disturbance is achieved when Nickel foils are used as interfacial layers, whereby a more realistic viscoelastic constitutive relation of the glass is derived. The obtained frictional and viscoelastic constants are further incorporated into computational modeling of the CCT and precision molding processes. The demonstrated consistencies between the simulated and measured results (creep displacement and molding force) suggest that, by technically slashing the interface friction and theoretically correcting the friction‐involved stress in CCTs, the frictional disturbance to experimental stress‐strain data can be effectively weakened, and a viscoelastic model of enhanced predictive accuracy can be thus developed.

show abstract

Section: Numerical Reproduction Of the Cctsmentioning

confidence: 75%

mentioning

confidence: 99%

“…As far as viscoelastic characterization is concerned, there are currently several methods that are based on the creep behavior of glass, such as compression creep test (CCT), [14][15][16][17] bending creep test, 18,19 and indentation creep test. 14,15 Based on CCTs, high-temperature viscous and elastic parameters of many types of glasses, such as As 2 S 3 , BK7, and SK5, were successfully measured. 14,15 Based on CCTs, high-temperature viscous and elastic parameters of many types of glasses, such as As 2 S 3 , BK7, and SK5, were successfully measured.…”

mentioning

confidence: 99%

mentioning

confidence: 99%

See 2 more Smart Citations

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

Luo

Zhang

et al. 2019

J Am Ceram Soc

View full text Add to dashboard Cite

show abstract

“…However, Scherer stresses that, albeit a good approximation near the glass transition, it fails at high temperature where the glass exhibits liquid‐like viscoelasticity . In particular, sensitivity studies of the TRS assumption highlight that non‐negligible deviation occurs in the numerical predictions of the molded lens shape or creep displacements …”

Section: Introductionmentioning

confidence: 99%

Modeling of thermo‐viscoelastic material behavior of glass over a wide temperature range in glass compression molding

Grunwald

Bergs

2020

J Am Ceram Soc

View full text Add to dashboard Cite

In glass compression molding, most current modeling approaches of temperature‐dependent viscoelastic behavior of glass materials are restricted to thermo‐rheologically simple assumption. This research conducts a detailed study and demonstrates that this assumption, however, is not adequate for glass molding simulations over a wide range of molding temperatures. In this paper, we introduce a new method that eliminates the prerequisite of relaxation functions and shift factors for modeling of the thermo‐viscoelastic material behavior. More specifically, the temperature effect is directly incorporated into each parameter of the mechanical model. The mechanical model parameters are derived from creep displacements using uniaxial compression experiments. Validations of the proposed method are conducted for three different glass categories, including borosilicate, aluminosilicate, and chalcogenide glasses. Excellent agreement between the creep experiments and simulation results is found in all glasses over long pressing time up to 900 seconds and a large temperature range that corresponds to the glass viscosity of log (η) = 9.5 – 6.8 Pas. The method eventually promises an enhancement of the glass molding simulation.

show abstract

Accurate and efficient determination of glass thermo-viscoelastic properties using creep compliance master curve construction approach

Zhou,

Xiao,

Huang

et al. 2024

Journal of Non-Crystalline Solids

View full text Add to dashboard Cite

Thermo-mechanical characterization of glass at high temperature using the cylinder compression test. Part II: No-slip experiments, viscoelastic constants, and sensitivity

Cited by 11 publications

References 12 publications

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

A comprehensive study on frictional dependence and predictive accuracy of viscoelastic model for optical glass using compression creep test

Modeling of thermo‐viscoelastic material behavior of glass over a wide temperature range in glass compression molding

Accurate and efficient determination of glass thermo-viscoelastic properties using creep compliance master curve construction approach

Contact Info

Product

Resources

About