Numerical modelling of the mechanical behaviour of wood fibre-reinforced geopolymers

Şerban, Dan Andrei; Furtos, Gabriel; Marșavina, Liviu; Şoşdean, Corina; Negru, Radu

doi:10.1007/s00161-020-00934-9

Cited by 4 publications

(2 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Upon decomposing the plastic deformation in volumetric and shear deformation, the dilatancy indicates the attitude of a material to develop volume changes (namely plastic volumetric strain) during plastic shearing [64]. In fact, if 𝜓 = 0, the material is incompressible, and if 𝜓 > 0, the material dilates [65]. However, it is important to highlight that the dilation angle has no effect on the material strength, which is different fr what happens in the Drucker-Prager or Mohr-Coulomb criteria, which have an associated potential flow so the dilation angle is equal to the friction angle because the flow potential coincides with the yield function.…”

Section: Dilation Anglementioning

confidence: 99%

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

Rainone,

Tateo,

Casolo

et al. 2023

Buildings

View full text Add to dashboard Cite

Considering the high vulnerability of existing masonry buildings, which often have strategic or cultural value, professionals and specialized engineers are frequently required to model complex historical buildings. The approaches proposed by National Building Codes may not always be suitable for such cases, but more detailed approaches are necessary, relying on FEM continuum modeling and inelastic constitutive law. There are many constitutive laws proposed in the literature that allow us to accurately reproduce the mechanical behavior of masonry. However, they require the identification of several parameters that are not easy to determine. In this study, a sensitivity analysis of the parameters of a nonlinear constitutive law very popular for masonry modeling (the “Concrete Damage Plasticity—CDP” model) is conducted, considering literature tests of masonry panels under shear stress as the benchmark. The aim is to assess the influence of the main parameters of the model and compare them to one of the more commonly used Mohr–Coulomb failure criteria.

show abstract

Section: Dilation Anglementioning

confidence: 99%

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

Rainone,

Tateo,

Casolo

et al. 2023

Buildings

View full text Add to dashboard Cite

show abstract

“…To support and develop the adoption of natural-fiber-reinforced geopolymers (mortar and/or concrete) in the construction industry, it is fundamental to define a suitable and affordable numerical model of the mechanical behavior of the relevant material to be introduced in Finite Element Method (FEM) software allowing for an evaluation of the acting stress-strain fields. This aspect is worthy of investigation, and few papers have been devoted to this topic (see, e.g., [32][33][34][35][36]). The aim of this work is to a further progress in the numerical modelling of sisal-fiber-reinforced geopolymer mortar, starting from experimental tests (compressive, three-point bending and splitting tests) performed with different percentages of fiber reinforcement.…”

Section: Introductionmentioning

confidence: 99%

Experimental Analysis and Numerical Modelling of the Mechanical Behavior of a Sisal-Fiber-Reinforced Geopolymer

Benfratello,

Cirello,

Palizzolo

et al. 2024

Applied Sciences

View full text Add to dashboard Cite

The present paper is devoted to the proposal of appropriate numerical modelling able to provide a suitable description of the mechanical behavior of a composite geopolymer. Reference is made to a natural sisal-fiber-reinforced geopolymer. The study is based on the results of appropriate experimental investigations for compressive, flexural and splitting loadings, taking into account different weight percentages of fibers to evidence their role in the mechanical behavior. The main objective of the paper is to calibrate the microplane constitutive model, available in ANSYS software version 18.1, where the numerical analyses are performed. Therefore, the present study is structured in two different steps. Firstly, the mechanical behavior of geopolymers reinforced with sisal fibers is experimentally investigated, and subsequently, the gathered test data are interpreted and utilized to calibrate the relevant constitutive model to be used in the numerical stage. The obtained results are compared with experimental data, yielding good correlations. The paper’s results supply the parameters required to obtain an affordable numerical model of the reinforced geopolymer for different percentages of fibers to be adopted for material design with assigned mechanical properties.

show abstract

Environmental degradation of foamed geopolymers

Korniejenko

Figiela

Kozub

et al. 2022

Continuum Mech. Thermodyn.

View full text Add to dashboard Cite

Modern materials used in civil engineering should fulfill the numerous of requirements connected building standards, but not only. They should also be ecological and durable. Geopolymers are characterized by very good mechanical properties, high resistance against acids, chlorides and sulfates, high thermal resistance, and other properties confirmed by previous research. There is still a few amount of research connected with resistance, this materials for different environmental conditions, especially a lack of investigation connected with foamed geopolymers in this area. The main objective of the article is to analyze the possibilities of the development of new foamed geopolymer composites to increase durability, especially against degradation in corrosive water environments. This paper presents the influence on the mechanical properties of foamed geopolymer composites on the water environment. As raw materials, fly ash from the coal power plant ‘Skawina’ (located in: Skawina, Lesser Poland, Poland) and metakaolin (Czech Republic) were used. The chemical composition of the fly ash is typical for class F. Additionally, the composites were reinforced by flax fiber. Solid and foam samples were prepared. As a foaming agent, hydrogen peroxide (H$$_{2}$$ 2 O$$_{2})$$ 2 ) was applied. The following research methods were applied: compressive strength, flexural strength, porosity measurements, water absorption in fresh and salt water. The results show that, however, environmental conditions have a significant influence on the mechanical properties of geopolymer composites; the geopolymer composites can be successfully produced with the addition of natural fibers and have good strength parameters even after long-term use (materials were tested after 360 days).

show abstract

Numerical modelling of the mechanical behaviour of wood fibre-reinforced geopolymers

Cited by 4 publications

References 20 publications

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

About the Use of Concrete Damage Plasticity for Modeling Masonry Post-Elastic Behavior

Experimental Analysis and Numerical Modelling of the Mechanical Behavior of a Sisal-Fiber-Reinforced Geopolymer

Environmental degradation of foamed geopolymers

Contact Info

Product

Resources

About