Crushing of steel tubes with different infills under partial axial loading

Ghazijahani, Tohid Ghanbari; Nabati, Amin; Azandariani, Mojtaba Gorji; Fanaie, Nader

doi:10.1016/j.tws.2020.106614

Cited by 20 publications

(3 citation statements)

References 23 publications

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“…Energy absorption and crushing performance of capped cylindrical tubes [13] were analyzed under oblique impact which showed better energy absorption performance than standard cylindrical tubes. The samples containing concrete and timber in the steel column tubes were tested for their stability under crushing [14]. The location of loading affected material loading capacity.…”

Section: Methodsmentioning

confidence: 99%

Effect of Crusher Arm Position and Surface Friction on the Mechanical Behaviour of a Crusher under Static Conditions

Yavuz

2024

Hittite Journal of Science and Engineering

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Crushers are utilized to break down or crush various components in industrial applications are subjected to high stresses. The crushing process is carried out by a crusher arm located on the crusher itself. The shape and length of the crusher arm influence the deformation on the arm and the efficiency of crushing process. During the crushing process, stress concentrations occur at the contact regions and especially at the connection location of the crusher arm and the drive shaft. This study examined the connection of the crusher arm at various positions on the shaft and explored variations in stress. Finite element analysis was used in the analyses. The used material is standard steel that behaved elastically. The stresses changed in a way that was not proportional to the movement of the tangential crusher arm towards the center of the shaft. The d=8 mm and d=24 mm locations are the most suitable places to move the crusher arm rather than the tangential position (d=40 mm). The highest stresses occurred at the corners where the shaft and crusher arm connected and formed a stress concentration. The friction effects on the contact surface were also examined and the increased friction coefficient slightly reduced the stress values of the crusher system, but increased the stresses on the crushed object. Only maximum stress levels that are observed at the surface of the beam are mainly considered. The results regarding the crusher arm are discussed in detail.

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Section: Methodsmentioning

confidence: 99%

Effect of Crusher Arm Position and Surface Friction on the Mechanical Behaviour of a Crusher under Static Conditions

Yavuz

2024

Hittite Journal of Science and Engineering

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“… Definitions of vertical displacement ductility factors [ 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ]. …”

Section: Figurementioning

confidence: 99%

Experimental Investigation on the Vertical Ductility of Rectangular CFST Columns Loaded Axially

Grzeszykowski

Szmigiera

2022

Materials

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A total of 5 steel and 21 rectangular composite concrete-filled steel tube (CFST) columns of moderate slenderness were tested to investigate their ductility under axial compression. The importance of the vertical ductility of columns was discussed, and a novel ductility measure was proposed and utilized to examine the ductility of tested specimens. The analyses showed that the ductility of axially compressed CFST columns highly depends on their failure mode. The key feature influencing the ductility is their ability to dissipate the energy of imposed loads. The larger the volume of a material that may permanently deform and consequently dissipate the energy, the greater this ability. In consequence, the ductility of specimens exhibiting local failure mode was higher in comparison to the columns that underwent global or mixed global—local failure. It was found that both steel and composite columns were able to carry axial loads in the post-critical state; but due to the limitations of local buckling of the steel cross-section in the concrete core and concrete confinement, all tested composite columns showed greater ductility than their steel counterparts.

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“…Reduced porosity and a disconnected pore network render HPC highly resistant to corrosive fluid penetration, making it very durable, even in severe conditions [ 22 , 23 , 24 , 25 ]. Due to its decreased permeability, HPC has generally strong fire resistance; nonetheless, the narrower pore network might produce explosive spalling at high enough temperatures [ 26 , 27 , 28 , 29 , 30 , 31 ]. Such spalling may be minimized by including soft polymers, such as crushed rubber, into the concrete, since they impart a greater elastic modulus [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Application of Polyacrylic Hydrogel in Durability and Reduction of Environmental Impacts of Concrete through ANN

Peng

Zandi

et al. 2022

Gels

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While adding superabsorbent polymer hydrogel particles to fresh concrete admixtures, they act as internal curing agents that absorb and then release large amounts of water and reduce self-desiccation and volumetric shrinkage of cement that finally result in hardened concrete with increased durability and strength. The entrainment of microscopic air bubbles in the concrete paste can substantially improve the resistance of concrete. When the volume and distribution of entrained air are adequately managed, the microstructure is protected from the pressure produced by freezing water. This study addresses the design and application of hydrogel nanoparticles as internal curing agents in concrete, as well as new findings on crucial hydrogel–ion interactions. When mixed into concrete, hydrogel particles produce their stored water to power the curing reaction, resulting in less volumetric shrinkage and cracking and thereby prolonging the service life of concrete. The mechanical and swelling performance qualities of the hydrogel are very sensitive to multivalent cations found naturally in concrete mixes, such as aluminum and calcium. The interactions between hydrogel nanoparticles and alkaline cementitious mixes are described in this study, while emphasizing how the chemical structure and shape of the hydrogel particles regulate swelling behavior and internal curing efficiency to eliminate voids in the admixture. Moreover, in this study, an artificial neural network (ANN) was utilized to precisely and quickly analyze the test results of the compressive strength and durability of concrete. The addition of multivalent cations reduced swelling capacity and changed swelling kinetics, resulting in fast deswelling behavior and the creation of a mechanically stiff shell in certain hydrogel compositions. Notably, when hydrogel particles were added to a mixture, they reduced shrinkage while encouraged the creation of particular inorganic phases within the void area formerly held by the swelled particle.

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Crushing of steel tubes with different infills under partial axial loading

Cited by 20 publications

References 23 publications

Effect of Crusher Arm Position and Surface Friction on the Mechanical Behaviour of a Crusher under Static Conditions

Effect of Crusher Arm Position and Surface Friction on the Mechanical Behaviour of a Crusher under Static Conditions

Experimental Investigation on the Vertical Ductility of Rectangular CFST Columns Loaded Axially

Application of Polyacrylic Hydrogel in Durability and Reduction of Environmental Impacts of Concrete through ANN

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