Design of a novel horizontal impact machine for testing of concrete specimens

Máca, Petr; Zatloukal, Jan; Sovják, Radoslav

doi:10.2495/susi140131

Cited by 8 publications

(4 citation statements)

References 10 publications

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“…The impact energy testing machine works on the principle of free fall (Maca et al, 2014). The impact velocity can be determined using equation ( 6) (Sharma & Aggarwal, 2012) Where V = impact velocity g = acceleration due to gravity (m/s 2 ) h = drop height (m) The velocity was determined to be M = N2 × 9.81 × 1.2=4.85m/s…”

Section: Determination Of Impact Velocitymentioning

confidence: 99%

Design and Fabrication of Impact Strength Machine

2021

JIEA

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The development of the impact strength testing machine is successfully presented. The impact strength testing machine is necessary for ascertaining the strength of metallic components in withstanding applied load. A comprehensive design analysis was carried out to ascertain the various component sizes of the Impact strength testing machine in order to create a path for precise construction. Majority of the materials used in this fabrication were obtained locally. The constructed machine yielded a maximum velocity of 4.9m/s on execution of Charpy and Izod impact test. Great stability was achieved as a result of thick base plate and column support used during construction. A crushing force of 68.05KN and an impactor head energy of about 35J was able to impart the requisite deformation on the metallic specimen needed for the Charpy and Izod tests.

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Section: Determination Of Impact Velocitymentioning

confidence: 99%

Design and Fabrication of Impact Strength Machine

2021

JIEA

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“…They constructed an impact pendulum to investigate the dissipated mechanical energy for UHPFRC plates. The impact pendulum, which was already built in the Experimental Centre at CTU in Prague (Máca et al, 2014a(Máca et al, , 2014b, was modified in a similar manner. Figures 3 and 4 show the principle of the modified impact pendulum.…”

Section: Impact Testingmentioning

confidence: 99%

Experimental procedure for determination of the energy dissipation capacity of ultra-high-performance fibre-reinforced concrete under localized impact loading

Konrád

Sovják

2019

International Journal of Protective Structures

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Research presented in this article is aimed to investigate the ability of ultra-high-performance fibre-reinforced concrete to absorb and dissipate mechanical energy at elevated strain rate loading. Specimens made of ultrahigh-performance fibre-reinforced concrete were subjected to the low-velocity impact using the new testing procedure where no fixed supports that hold the sample during the impact were applied. The fibre volume fraction of the ultra-high-performance fibre-reinforced concrete was set as the main test variable in the framework of this study and the volumetric fraction of fibres was ranging from 0.125% to 2%. A high-speed camera was used to measure velocities of the impactor and the ultra-high-performance fibre-reinforced concrete specimen before and after the impact. Consequently, the energy dissipated by the ultra-highperformance fibre-reinforced concrete specimen during the impact was calculated using a simple energy balance equation. To determine the basic material properties of ultra-high-performance fibre-reinforced concrete, quasi-static loading rate was applied and conventional methods were used. A significant difference between the values of dissipated energies for different loading rates and various fibre volumetric fractions was observed. It can be noted that the new procedure shows a reasonable approach for testing the fibrereinforced cementitious composites under localized impact loading and is worthy of further optimization.

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“…The high-performance fibre reinforced concrete (HPFRC) samples were tested in the horizontal impact machine, which was developed and build at Faculty of Civil Engineering at the CTU in Prague. More information about impact machine and its development are in [8]. Principle of this horizontal impact machine is based on pendulum principle.…”

Section: Experimental Programmentioning

confidence: 99%

Response of High-Performance Fibre Reinforced Concrete Reinforced by Textile Reinforcement to Impact Loading

Vogel

Holčapek²,

Konvalinka³

2016

Acta Polytech

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Abstract. Generally, cement composites like high-performance concrete (HPC) are very brittle. The resistance to the impact loading of the HPFRC and the HPFRC reinforced by the textile reinforcement are compared in this article. The samples (0.56 × 0.1 × 0.1 m) were experimentally tested in three-point bending, by using horizontal impact machine. The better resistance of the textile reinforced HPFRC is obvious from the collected data (impact force, acceleration of hammer and acceleration of the tested sample).

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Design of a novel horizontal impact machine for testing of concrete specimens

Cited by 8 publications

References 10 publications

Design and Fabrication of Impact Strength Machine

Design and Fabrication of Impact Strength Machine

Experimental procedure for determination of the energy dissipation capacity of ultra-high-performance fibre-reinforced concrete under localized impact loading

Response of High-Performance Fibre Reinforced Concrete Reinforced by Textile Reinforcement to Impact Loading

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