Deformability and strengh of expanded polystyrene (EPS) under short-term shear loading

Gnip, Ivan; Veyelis, S. A.; Keršulis, V.; Vaitkus, Saulius

doi:10.1007/s11029-007-0009-z

Cited by 12 publications

(16 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Very limited studies have examined the static tensile properties of EPS [27,28]. Gnip et al [27] carried out the quasi-static tensile tests on flat specimens of EPS boards. The tested specimens were attached to two rigid metal plates with epoxy resin.…”

Section: Introductionmentioning

confidence: 99%

Static and dynamic mechanical properties of expanded polystyrene

et al. 2015

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Static and dynamic mechanical properties of expanded polystyrene

et al. 2015

View full text Add to dashboard Cite

“…4 As foam, EPS is characterized by a high proportion of air, typically 95% to 98% by volume. [5][6][7] It is characterized by a low density, typically less than 30 kg/m 3.8 Such EPS foam is water proof, lightweight, and possesses excellent thermal insulation properties. These properties make it ideal for packaging, 4,9,10,11 as it has shock absorbing properties, which make it beneficial for storing and transporting fragile items.…”

Section: Introductionmentioning

confidence: 99%

“…Under the effect of elevated temperature, expandable polystyrene beads are expanded and turn to closed‐cell EPS foams 4 . As foam, EPS is characterized by a high proportion of air, typically 95% to 98% by volume 5‐7 . It is characterized by a low density, typically less than 30 kg/m 3.…”

Section: Introductionmentioning

confidence: 99%

The effect of thermal treatment on the properties of expanded polystyrene

Ellouze

Jesson

Cheikh

2020

Polymer Engineering & Sci

View full text Add to dashboard Cite

Expanded polystyrene (EPS) is a commonly used polymer in the packaging industry and for the thermal insulation of buildings. It has poor mechanical properties, which limit its application in some areas. A heat treatment was carried out on a sample of EPS, in order to improve its mechanical properties. The treatment consists of operations that combine the heating and cooling of the material. It is executed to improve the characteristics of the treated polymer and make it more favorable for use in new applications. In the case of EPS, this process changes the behavior of the polymer in a beneficial manner and maximizes its density and hardness. Indeed, the treated version shows interesting mechanical, tribological, and hygroscopic properties. This improvement was obtained mainly due to the morphological modification of the structure of EPS. Indeed, heat treatment leads to the creation of a polystyrene crust, which covers every EPS bead. This crust protects the cell structure of each bead against stretching and supports most of the load applied to the treated version of EPS. Thus, the treated EPS can be used not only for packaging and thermal insulation but also for more structural applications.

show abstract

“…The main shear test methods of rigid plastic foams comprise: (1) deformation of parallelepiped samples (two-rail and three-rail tests) given in Hilyard, 5 Renz 6 and Gnip et al. 7 and in standards DIN 53 427 (1986), EN 12090:1997, ISO 1922 (2001), LVS EN 12090 (2002) and ASTM C 273/C 273M-07a (2008); (2) torsion of thin-walled cylindrical or dumbbell-shaped samples 8,9 ; (3) tests using Arcan fixture (an analogue to Iosipescu fixture) 9,10 and (4) four-point flexural testing of sandwich structures for the determination of the shear strength of the core material. 11…”

Section: Introductionmentioning

confidence: 99%

“…The influence of bending is the highest near supports. Therefore, the shear moduli determined on the supports or according to crosshead are reported to depend on the height of the sample 7 and ASTM C 273/C 273M-07a (2008). The most homogeneous shear stress field could be expected in the geometric centre of a sample, around the neutral plane of bending.…”

Section: Introductionmentioning

confidence: 99%

An experimental method for the investigation of rigid polyurethane foams in shear

Beverte

2018

Journal of Cellular Plastics

View full text Add to dashboard Cite

Widespread applications of rigid polyurethane and plastic foams lead to shear deformations. Therefore, methods for ensuring shear using experimental investigations are necessary, including the possibility of determining the shear modulus, strength and limit angle. Therefore, a device that allows investigating the shear properties of highly porous plastic foams was developed. The proposed device comprises a clip-on extensometer, commonly exploited in uni-axial compression/tension tests, for the determination of the shear displacement directly on the foams’ sample, on a measurement zone of certain dimensions and location. An innovative construction of the extensometer’s legs is elaborated, permitting to investigate the shear displacement field for different dimensions of the measurement zone. Precision of the device is examined by performing a penetration test on materials of different densities: (a) polyurethane foams and (b) wood. Technology for the production of isotropic polyurethane foams as a test material is described in detail. Experimental determination of shear modulus and strength of one and the same sample, in one and the same experiment is elaborated. Displacements in different zones of sample’s work beam are investigated. Experimental data are compared with the results of mathematical modelling and a good correlation is proved to exist.

show abstract

Deformability and strengh of expanded polystyrene (EPS) under short-term shear loading

Cited by 12 publications

References 4 publications

Static and dynamic mechanical properties of expanded polystyrene

Static and dynamic mechanical properties of expanded polystyrene

The effect of thermal treatment on the properties of expanded polystyrene

An experimental method for the investigation of rigid polyurethane foams in shear

Contact Info

Product

Resources

About