The mechanical behaviour of SentryGlas $$^{\circledR }$$ ® ionomer and TSSA silicon bulk materials at different temperatures and strain rates under uniaxial tensile stress state

Santarsiero, Manuel; Louter, Christian; Nussbaumer, Alain

doi:10.1007/s40940-016-0018-1

Cited by 43 publications

(42 citation statements)

References 17 publications

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“…Several authors have investigated the mechanical response of SG-laminated components [27]- [36] and the SG-bulk material [37]- [44]. Conversely, studies on the resistance of SG laminated connections are rather limited.…”

Section: Literature On Ionomer Sentryglas® (Sg) and Sg Connectionsmentioning

confidence: 99%

“…The results showed that SG connections exhibit one of the largest load carrying capacity, often limited by glass failure. Limited results are available in literature at different temperatures [16], [44], [49]- [52]. Preliminary results show that temperature has a dominant effect on the mechanical response of the connection, with a severe reduction of the maximum load-carrying capacity at high temperature.…”

Section: Literature On Ionomer Sentryglas® (Sg) and Sg Connectionsmentioning

confidence: 99%

“…Table 1 collects a summary of the basic properties provided by standards and material producers for the materials used in this study, which are SG, TSSA, glass and stainless steel. Further material properties used in this work are taken for the experimental investigation performed in [44]. TSSA is a one-component addition-cured silicon with no by-products, characterized by nano-silica and cross-linked polymers.…”

Section: Objectivesmentioning

confidence: 99%

“…The comparison of the whitening phenomenon observed in this work under tensile load to the results from uniaxial and shear tests available in literature indicates that the whitening phenomenon is proportional to the hydrostatic component of the stress tensor. Indeed during shear tests [21], [26] the whitening phenomenon is almost not visible and in uniaxial tests [44] it is more visible than in shear tests, yet much less pronounced than in tensile tests. According to these observations, the hydrostatic component 13 of the stress tensor during the tensile tests is expected to be quite large for most of the adhesive area.…”

Section: Tssa Under Tensile Loadmentioning

confidence: 99%

“…This implies that the adhesive material is subjected to a strain tensor that mainly induces volume change. On the other hand side, at high temperature, the SG Poisson's ratio approaches a value of 0.5 [44]. Materials with Poisson's ratio close to 0.5 are also called incompressible material since no-volume change is allowed.…”

Section: Sg 50°c Sg 80°cmentioning

confidence: 99%

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Laminated connections under tensile load at different temperatures and strain rates

Santarsiero¹,

Louter²,

Nussbaumer³

2017

International Journal of Adhesion and Adhesives

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In the last years, a novel typology of adhesive connections for structural glass application has emerged, known as laminated adhesive connections, which makes use of the transparent ionomer SentryGlas® (SG) from Kuraray and the Transparent Structural Silicon Adhesive (TSSA) from Dow Corning. Despite being used in several projects, limited information is available in literature on their mechanical behaviour and on the effects of strain rate and temperature. In this work the behaviour of laminated connections under tensile loading is studied by means of experimental, analytical and numerical analyses. The experimental investigations show that temperature and strain rate variations have important effects on the mechanical response of the connections. Two main interesting phenomena are also observed: the whitening phenomenon in TSSA and the development of bubble within the SG adhesive. The analytical studies of the stress state show that confinement state of the adhesive induces a non-uniform three-dimensional stress distribution in the adhesive with a dominant hydrostatic component of the stress tensor, which is observed to be in agreement with the experimental results. Three-dimensional finite numerical analyses show that the stress field deviates from the uniform distribution with a large gradient of hydrostatic and deviatoric stresses over the adhesive area. The output of the finite numerical model are then compared with the observations of the experimental campaigns. Herein, the full set of numerical results is synthetized by the definition of socalled stress factors. The latter allow to derive the three-dimensional stress state in the adhesive at different temperatures and to compute the stress peak in the non-linear stress field distribution. Finally, prediction models are proposed for the tensile resistance of TSSA and SG laminated connections. A logarithmic law is proposed for the strain rate effects for both TSSA and SG connections. Linear and inverse hyperbolic-tangent-based laws are instead proposed for the TSSA and SG temperature effects, respectively. KeywordsLaminated adhesive connections, structural glass, experimental investigation, numerical modeling, tensile loading, strain rate effect, temperature effect -3 -

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Section: Literature On Ionomer Sentryglas® (Sg) and Sg Connectionsmentioning

confidence: 99%

Section: Literature On Ionomer Sentryglas® (Sg) and Sg Connectionsmentioning

confidence: 99%

Section: Objectivesmentioning

confidence: 99%

Section: Tssa Under Tensile Loadmentioning

confidence: 99%

Section: Sg 50°c Sg 80°cmentioning

confidence: 99%

See 3 more Smart Citations

Laminated connections under tensile load at different temperatures and strain rates

Santarsiero¹,

Louter²,

Nussbaumer³

2017

International Journal of Adhesion and Adhesives

Self Cite

View full text Add to dashboard Cite

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Transparency in Structural Glass Systems Via Mechanical, Adhesive, and Laminated Connections ‐ Existing Research and Developments

Bedon

Santarsiero²

2018

Adv Eng Mater

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The consistent architectural transparency demand in buildings is highly promoting the structural use of glass, in combination or to replace loadbearing components made of traditional constructional materials. Despite its huge application in facades, roofs, envelopes, frame components, however, glass still represents a rather innovative and not well-known material, requiring specific design conceptsm and further extended studies, toward the fulfillme nt of safe design requirements. A key role in glass systems and assemblies involving multiple components is given to connections. Major issues in their design, consequently, arise from restraining single glazing elements, as well as from ensuring their mechanical interaction with other constructional systems, as a part of full 3D buildings, including several materials, and various loading/boundary conditions. In this paper, an overview of typical connection types in use for glass systems is presented, with special consideration for mechanical, adhesive, and laminated adhesive connections, giving evidence of their typical applications, evolution, current design issues. Existing research and major projects are also discussed, both at the material/component level as well as at the assembly level.

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Spannungsoptische Untersuchungen an polymeren Zwischenschichten in Verbundgläsern

et al. 2022

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Die im thermischen Vorspannprozess induzierten Eigenspannungen verursachen unter polarisiertem Licht Anisotropie‐Effekte im Glas. Derzeit beschränkt sich die Kontrolle dieser Anisotropien, welche als optische Gangunterschiede quantifiziert werden, auf Einzelgläser. In dieser Studie werden erstmals spannungsoptische Untersuchungen an Verbundgläsern durchgeführt. Im Zugversuch wird die spannungsoptische Konstante von PVB und SG ermittelt und in Gangunterschiedsmessungen die Auswirkung des Verbundprozesses analysiert. Die Ergebnisse zeigen, dass ein Unterschied zwischen den Polymeren hinsichtlich ihrer spannungsoptischen Eigenschaften besteht und dass durch die Folie eine Erhöhung der Gangunterschiedswerte im Verbundglas feststellbar ist. Investigation of polymeric interlayers in laminated glass using photoelasticity. The residual stresses induced in the thermal toughening process cause so‐called anisotropy effects in the glass under polarized light. Currently, the control of anisotropies, which are quantified as optical retardation, is limited to monolithic glass. In this study, for the first time, photoelastic studies are performed on laminated glass panes. The photoelastic constant of PVB and SGP interlayers is determined in tensile tests, and the effect of the lamination process is analyzed in retardation measurements. The results show that there is a difference between the interlayers with respect to their photoelastic properties and that an increase in the retardation values in the laminated glass was detectable due to the insertion of the polymer film.

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The mechanical behaviour of SentryGlas $$^{\circledR }$$ ® ionomer and TSSA silicon bulk materials at different temperatures and strain rates under uniaxial tensile stress state

Cited by 43 publications

References 17 publications

Laminated connections under tensile load at different temperatures and strain rates

Laminated connections under tensile load at different temperatures and strain rates

Transparency in Structural Glass Systems Via Mechanical, Adhesive, and Laminated Connections ‐ Existing Research and Developments

Spannungsoptische Untersuchungen an polymeren Zwischenschichten in Verbundgläsern

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