Experimental investigations and constitutive modeling of cyclic interface shearing between HDPE geomembrane and sandy gravel

Cen, Weijun; Bauer, Erich; Wen, Lei; Wang, H.; Sun, Yi

doi:10.1016/j.geotexmem.2018.12.013

Cited by 30 publications

(5 citation statements)

References 45 publications

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“…Models that can realistically represent the tensile response of geosynthetics are fundamental for attaining economic solutions. In the literature, there are examples of studies using a variety of constitutive models for geosynthetics [9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

“…Models that can realistically represent the tensile response o geosynthetics are fundamental for attaining economic solutions. In the literature, there are examples of studies using a variety of constitutive models for geosynthetics [9][10][11][12]. Different constitutive theories can form the basis of the stress-strain relation o materials, such as elasticity, plasticity, viscoelasticity and viscoplasticity [13].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

A Constitutive Model for Describing the Tensile Response of Woven Polyethylene Terephthalate Geogrids after Damage

Lombardi,

Pinho-Lopes,

Paula

et al. 2023

Materials

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A constitutive model was used to describe the tensile response of two woven Polyethylene Terephthalate (PET) geogrids, before and after mechanical damage. The model parameters of undamaged and damaged specimens were estimated via numerical regressions of test results. For each sample, the experimental and fitted tensile strengths were statistically compared using hypothesis tests. For each geogrid, tensile load–strain curves of damaged samples were drawn by applying scaling factors to the plot of the undamaged sample. The curve fittings resulted in high R2 values for undamaged and damaged specimens of the geogrids. For most samples, there was no significant mean difference between the experimental and fitted tensile strength. The model allowed us to describe the load–strain curve of a geogrid from its tensile properties: εmax, Tmax and Ji. Regardless of the type of damage (in laboratory or in situ), the model was able to describe the load–strain curves of damaged samples using data from undamaged samples and scaling factors.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A Constitutive Model for Describing the Tensile Response of Woven Polyethylene Terephthalate Geogrids after Damage

Lombardi,

Pinho-Lopes,

Paula

et al. 2023

Materials

View full text Add to dashboard Cite

show abstract

“…Cen et al [14] performed a study on the cyclic interface shear between geomembranes and sandy gravel. At the end of the study, a new empirical correlation was suggested.…”

Section: Introductionmentioning

confidence: 99%

Stability of MSW Landfill Slopes Reinforced with Geogrids

Keskin

Kezer

2022

Applied Sciences

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Slope stability is one of the main problems encountered in MSW (municipality solid waste) landfill designs. Slope stability calculations become difficult due to the heterogeneous structure of MSW landfills and leachate, and therefore, slope geometries are formed by choosing low slope angles for safe designs. This causes less waste to be stored on site. This study presents slope stability analyses of MSW landfills. Numerical analyses were performed using finite element and limit equilibrium methods. The stability behavior of landfill slopes was analyzed for both unreinforced and geogrid-reinforced conditions in order to investigate the effects of shear strength parameters, the unit weight of soil waste, and material model parameters. It has been seen that the stability of landfill slopes can be increased significantly using geogrid materials. When the optimum geogrid parameters obtained from the numerical analysis results are used, it has been observed that the safety factor of the slope can be increased by up to approximately two times. Slopes in landfills reinforced with geogrid reinforcements can be formed steeper, allowing more solid waste to be stored. Considering the high initial investment cost of MSW landfills, it has been concluded that storing more solid waste with the use of geogrids will provide significant economic gains. Based on the results, the optimum values of geogrid parameters were determined and suggested for maximum reinforcing effects in MSW landfill slopes.

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“…For these reasons, more experimental and numerical studies have been conducted on the test in the past three decades. 31,39,[49][50][51][52][53][54][55][56] The scale effect related to the specimen size in shear test devices has been studied since the 1930s. Parsons 57 presented the variation of sand friction angle as a function of the shear box size.…”

Section: Introductionmentioning

confidence: 99%

Investigations of granular specimen size effect in interface shear box test using a micro‐polar continuum description

Bauer

Ebrahimian

2021

Num Anal Meth Geomechanics

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Parametric studies were carried out to investigate the effects of specimen size and interface friction angle on the mechanical behaviour of a cohesionless granular material in the interface shear box test under constant normal load and plane strain conditions. For a description of the pressure and density dependent properties of granular materials such as sand, a micro-polar hypoplastic continuum model is used. Numerical simulations were performed to obtain the evolution of the deformations and the shear resistance for three different specimen lengths and interface friction angles using the finite element method in the updated Lagrange frame. Due to the presence of lateral rigid boundaries of the shear box, the deformations and the stresses became significantly inhomogeneous within the granular specimen. Correspondingly, the mobilised interface shear resistance and the deformation field within the specimen were not uniform along the interface. In the case of higher interface friction angles, the evolution of the mechanical quantities along the interface can also be influenced by the specimen size. It is shown that the calculated average friction angle mobilised along a rough interface is influenced by the shear box length and it can be lower than the prescribed one. In addition, the influence of sidewall friction inside the shear box frame was explored in terms of the response of the specimen. The results of the micro-polar hypoplastic model were also compared with those obtained from the corresponding non-polar version of the model to clarify the role of polar effects within the granular body. The numerical results provide new insights into the microstructural effects of the granular material on the mobilisation of the interface friction angle and indicate the complexities and difficulties to precisely determine and interpret the interface friction angle, obtained from the classical interface shear box experiment.

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Experimental investigations and constitutive modeling of cyclic interface shearing between HDPE geomembrane and sandy gravel

Cited by 30 publications

References 45 publications

A Constitutive Model for Describing the Tensile Response of Woven Polyethylene Terephthalate Geogrids after Damage

A Constitutive Model for Describing the Tensile Response of Woven Polyethylene Terephthalate Geogrids after Damage

Stability of MSW Landfill Slopes Reinforced with Geogrids

Investigations of granular specimen size effect in interface shear box test using a micro‐polar continuum description

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