FEA modelling of fracture toughness of steel fibre-reinforced geopolymer composites

Sanjayan, Jay; Pouraliakbar, Hesam

doi:10.1016/j.matdes.2015.03.029

Cited by 38 publications

(11 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…avoiding all integrals [., .] in (7). This seems to be supported by the discrete formulation (12), containing the 2nd time differences, corresponding to the 2nd time derivatives in (22), naturally.…”

Section: A Stronger Results For Dynamic Casementioning

confidence: 78%

“…The extensive use of brittle matrix composite materials requires also appropriate computational models to describe, with adequate accuracy, their mechanical behaviour. From a micromechanical model some macroscopic constitutive equations are derived for intentionally or random oriented fibres by [4], [5], [6] and [7], accounting for such physical processes as matrix / fibre debonding and fibre rupture. One of possible ways is to adopt a discontinuous-like finite element approach to the lattice model by [8].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

On a Computational Approach to Micro- and Macro-modelling of Damage in Brittle and Quasi-brittle Materials

Vála

Kozák

Jarošová³

2020

International Journal of Mechanics

View full text Add to dashboard Cite

Computational modelling of damage in brittle and quasi-brittle materials needs some coupling between micro- and macroscopic crack initiation and evolution, up to their non-negligible softening behaviour. Most such approaches contain ad hoc evaluations, with some physical and engineering motivations, namely those connected with massive application of steel fibre-reinforced concrete and similar composites in building projects, but without any proper mathematical existence and convergence analysis for the time development of damage. This paper presents a possibility of such deterministic analysis on a selected model problem of structural dynamics, supplied by comments to useful directions of generalization. Several application examples document the feasibility of such approach, up to its software implementation and real data validation.

show abstract

Section: A Stronger Results For Dynamic Casementioning

confidence: 78%

Section: Introductionmentioning

confidence: 99%

On a Computational Approach to Micro- and Macro-modelling of Damage in Brittle and Quasi-brittle Materials

Vála

Kozák

Jarošová³

2020

International Journal of Mechanics

View full text Add to dashboard Cite

show abstract

“…the bond mechanisms between steel fibre and matrix [8,[15][16][17]. Based on the results, it is concluded that the mechanical deformation of fibres and matrix strength play a major role on pull-out response.…”

Section: Numerous Experimental and Analytical Investigations Have Beementioning

confidence: 91%

“…The fibre contribution is mainly reflected when the concrete cracking initiates and often enhances the post-cracking behaviour due to the improved stress transfer provided by the fibre bridging of the cracked sections [8]. The efficiency of fibre in transferring stress is greatly dependent on bond mechanisms between fibre and matrix [9].…”

Section: Introductionmentioning

confidence: 99%

Analysis and modelling of mechanical anchorage of 4D/5D hooked end steel fibres

2016

View full text Add to dashboard Cite

This paper represents an analytical model to predict the influence of the fibre geometry on the pull-out behaviour of various geometrical hooked end steel fibres. The model is established based on the concept of a frictional pulley along with two, three and four plastic hinges to simulate the mechanical anchorage effect provided by the hook. The mechanical contribution of the hook is a function of the cold work needed to straighten the fibre during the pull-out. The input parameters used in this model are directly related to geometrical and mechanical properties of each fibre. Model predictions are validated against experimental results for single fibre pull-out tests, and very good agreement is shown.

show abstract

“…It was shown that compressive strength, splitting tensile strength and flexural toughness significantly improved by the macro fibres, with the end-deformed fibres being more effective than the straight and length-deformed types. Sanjayan et al [ 19 ] studied the fracture toughness of geopolymer pastes reinforced with up to 5% volume of steel fibres of 30 mm length and proposed a model to predict the fracture toughness by using finite element analysis.…”

Section: Introductionmentioning

confidence: 99%

Workability and Flexural Properties of Fibre-Reinforced Geopolymer Using Different Mono and Hybrid Fibres

et al. 2021

View full text Add to dashboard Cite

The effects of mono (single type) and hybrid (mixed types) fibres on the workability, compressive strength, flexural strength, and toughness parameters of fly ash geopolymer mortar were studied. The ratio of sand to geopolymer paste of the mortar was 2.75. It was found that workability of mortar decreased more with the use of PP fibres due to its higher dispersion into individual filaments in geopolymer mortar compared to the bundled ARG and PVA fibres. Compressive strength increased by 14% for using 1% steel with 0.5% PP fibres compared to that of the control mixture, which was 48 MPa. However, 25 to 30% decrease of compressive strength was observed in the mortars using the low-modulus fibres. Generally, flexural strength followed the trend of compressive strength. Deflection hardening behaviours in terms of the ASTM C1609 toughness indices, namely I5, I10 and I20 were exhibited by the mortars using 1% steel mono fibres, 0.5% ARG with 0.5% steel and 1% PVA with 0.5% steel hybrid fibres. The toughness indices and residual strength factors of the mortars using the other mono or hybrid fibres at 1 or 1.5% dosage were relatively low. Therefore, multiple cracking and deflection hardening behaviours could be achieved in fly ash geopolymer mortars of high sand to binder ratio by using steel fibres in mono or hybrid forms with ARG and PVA fibres.

show abstract

FEA modelling of fracture toughness of steel fibre-reinforced geopolymer composites

Cited by 38 publications

References 26 publications

On a Computational Approach to Micro- and Macro-modelling of Damage in Brittle and Quasi-brittle Materials

On a Computational Approach to Micro- and Macro-modelling of Damage in Brittle and Quasi-brittle Materials

Analysis and modelling of mechanical anchorage of 4D/5D hooked end steel fibres

Workability and Flexural Properties of Fibre-Reinforced Geopolymer Using Different Mono and Hybrid Fibres

Contact Info

Product

Resources

About