Numerical Modeling of Concrete Spallation at Medium Strain-rate

Babiker, Ammar; Häußler‐Combe, Ulrich; Dean, Aamir; Ahmmed, Salih E. M.; Mahdi, E.

doi:10.52981/fjes.v9i1.667

Cited by 1 publication

(4 citation statements)

References 17 publications

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“…(1) introduced by Novikov et al (16) to calculate the dynamic tensile strength in the spallation test using the pullback velocity recorded on the rear face of the specimen. It has been applied by many researchers, for instance, Schuler et al (2), and Babiker et al (15).…”

Section: Indirect Methodsmentioning

confidence: 99%

“…To study the influence of adding short steel fiber on the conventional concrete matrix, different dosages of steel fibers have been investigated. The finite element simulations were performed with a similar setup as that presented in our previous research (15).…”

Section: Figure 1 Wave Propagation In Spallation Experimentsmentioning

confidence: 99%

“…where 𝐿 is the specimen length and ∆𝑡 is the time that the wave needs to propagate from the beginning to the end of the specimen. For more details, see Babiker et al (15).…”

Section: Wave Velocitymentioning

confidence: 99%

“…The analysis was performed using the Ls-Dyna explicit solver suitable to solve dynamic problems that involve wave propagation. The simulation of spallation is performed with a similar setup as given in Babiker et al (15), in which numerical study on spallation test of plain concrete is presented. The modeling aspects, including the finite element discretization, elements type, boundary conditions, material formulations, and contact algorithms are briefly discussed in the following.…”

Section: Numerical Simulation Of Spallationmentioning

confidence: 99%

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Numerical modeling of steel fiber reinforced concrete spallation exposed to medium loading rate

Dean¹,

Abu-Elgasim²,

Abdel-Magid³

2022

Global J. Eng. Technol. Adv.

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Properties of unreinforced concrete and cement-based matrix are well understood. One of the issues with the cement-based matrix is its inherently brittle failure when exposed to loading. As such, steel fibers were proposed to enhance the ductility of cement-based and concrete materials. Ever since, Fiber-Reinforced Concrete (FRC) has become a commonly used building material in many construction activities such as bridges, airport pavements, shotcrete, and many others. According to previous research, the addition of steel fibers, typically from 20 to 50 kg/m3 into the conventional concrete, can significantly enhance many of the desired engineering properties of hardened concrete such as flexural strength, tensile strength, micro-cracks as well as splitting. This research presents a study aimed to numerically investigate the influence of steel fibers on the dynamic behavior of Plain Concrete (PC) exposed the tensile loading at medium strain-rate. The influence of steel fibers is investigated using different fiber volume fractions ranging from 0.0 to 4.5%. The Modified Split-Hopkinson-Bar (MSHB) apparatus is employed to investigate the dynamic tensile behavior of PC and Steel Fiber-Reinforced Concrete (SFRC). Validation of the finite element model and constitutive material behavior is carried out with the comparison of computed and measured experimental pull-back velocities of the specimen’s free end. The results showed that impact properties of steel fibers exhibit significant improvement in the toughness and the dynamic tensile strength of concrete and higher fiber volume fraction is more effective in enhancing the mechanical properties of SFRC composite.

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Section: Indirect Methodsmentioning

confidence: 99%

Section: Figure 1 Wave Propagation In Spallation Experimentsmentioning

confidence: 99%

“…where 𝐿 is the specimen length and ∆𝑡 is the time that the wave needs to propagate from the beginning to the end of the specimen. For more details, see Babiker et al (15).…”

Section: Wave Velocitymentioning

confidence: 99%

Section: Numerical Simulation Of Spallationmentioning

confidence: 99%

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