Influence of U-shaped stiffeners on the blast-resistance performance of steel plates

Gan, Lu; Zong, Zhouhong; Lin, Jianwen; Chen, Yuli; Xia, Mengtao; Chen, Li

doi:10.1016/j.jcsr.2021.107046

Cited by 18 publications

(3 citation statements)

References 29 publications

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“…Since the displacement values for FE analysis of P7 and P8 are also much higher that experimental P6, the results are thus deemed as appropriate. From this, the developed FE model shows sufficient accuracy and thus, it can be extended for further studies as the errors are relatively low compared to other percentage error of over 20% reported in several other numerical studies of plates subjected to blast loads [18]- [20].…”

Section: Validation and Verificationmentioning

confidence: 64%

The Influence of Adiabatic Heat and Combined Blast Load and Fire Loading on the Response of Mild Steel Plates

Razak

Mazlan

Hassan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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This paper study the influence of adiabatic heat and fire loading on the behaviour of unstiffened mild steel plates subjected to close-in blast loads using finite element (FE) analysis. A quarter-symmetry 3D FE model consists of the steel plate, clamps and bolts was developed using Abaqus/CAE. Classical plasticity model was used as the material model in the steel plate and bolts. The clamps were assumed as an elastic material. Temperature-material properties relationship according to Eurocode 3 and Masui model was assigned to the steel plate. Conwep function was used to simulate the blast loads. The influence of strain rates was considered in the steel plate using the Cowper-Symonds equation. The FE model of the unstiffened plates was verified and validated against experimental data from literature, where a good agreement was achieved. The results suggest the adiabatic heat in the steel plates does not significantly influence the behaviour of the steel plates in both temperature-material properties models. The study then investigated the effect of combined blast loads and fire loading on the response of steel plates. The fire loading was applied by increasing the temperature in the steel from 200 °C to 1000 °C. Excessive deformation and thinning of the plate at the central area of the plate was observed. The thinning at the central area is pronounce than the thinning of the plate at the boundary between the clamp and the steel plate. Hence, the FE analysis suggests that the failure might occur at the central area of the plate, which could suggest a tearing type of failure. This type of failure is common in plates subjected to close-in blast loads. Therefore, this study has shown that the effect of adiabatic heat is insignificant, and the combined blast-fire loading might cause a similar type of failure as in plates subjected to blast loads only.

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Section: Validation and Verificationmentioning

confidence: 64%

The Influence of Adiabatic Heat and Combined Blast Load and Fire Loading on the Response of Mild Steel Plates

Razak

Mazlan

Hassan

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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show abstract

“…When studying the full coupling between a gas explosion and structure, the MAT_PLASTIC_KINEMATIC material model can effectively describe the strain rate effect and element failure behavior when the explosion wave acts on the structure. The materials used for the surface of the coal tunnel and the steel pipe are coal materials and Q345 steel, respectively [39,40]. The material parameters include static mechanical parameters and dynamic mechanical parameters, which need to be obtained through uniaxial load experiments and dynamic impact experiments, respectively.…”

Section: Materials Failure Criterionmentioning

confidence: 99%

Numerical Study on the Dynamic Response of Gas Explosion in Uneven Coal Mine Tunnels Using CESE Reaction Dynamics Model

Du,

Chen,

Zhu

et al. 2024

Applied Sciences

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A numerical simulation method combining the detailed chemical reaction mechanism of methane deflagration with an approximate real tunnel structure was proposed to confirm whether the unevenness of the tunnel wall during a coal mine gas explosion can be ignored. The approximate real tunnel model and smooth wall tunnel model were developed using 3D modeling methods. The propagation and attenuation processes of shock waves in the two tunnel models, as well as the different dynamic responses of the two tunnel walls, were compared and analyzed. Research results show that the non-uniformity of the tunnel wall decreases the shock wave overpressure and propagation velocity. The peak overpressure reduction value of the shock wave reaches 81.91 kPa, and the shock wave overpressure reaches its peak at an extended maximum time of 7.4 ms. The stress distribution on the approximate real tunnel wall is discontinuous, the propagation speed of stress waves in the bend tunnel is slower, and the duration of high load is relatively low. The displacement of the approximate real tunnel after gas explosion is lower than that of tunnels with smooth walls, and the displacement of most measuring points on the tunnel on the right is only 1/3–1/2 that of the smooth tunnel.

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“…When studying the full coupling between gas explosion and structure, MAT_PLASTIC_ KINEMATIC material model can effectively describe the strain rate effect and element failure behavior when the explosion wave acts on the structure [15,33]. The relationship between yield stress and plastic strain and strain rate in the material model is shown in formula (7), as follows:…”

Section: Materials Failure Criterionmentioning

confidence: 99%

Numerical study on the dynamic response of gas explosion in uneven coal mine tunnels using LS DYNA CESE reaction dynamics model

Du,

Chen,

Zhu

et al. 2024

Preprint

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A numerical simulation method combining detailed chemical reaction mechanism of methane deflagration with approximate real tunnel structure was proposed to confirm whether the unevenness of the tunnel wall during coal mine gas explosion can be ignored. The approximate real tunnel model and smooth wall tunnel model were developed using 3D modeling methods. The propagation and attenuation processes of shock waves in the two tunnel models, as well as the different dynamic responses of the two tunnel walls, are compared and analyzed. Research results show that the non-uniformity of the tunnel wall decreases the shock wave overpressure and propagation velocity. the peak overpressure reduction value of the shock wave reached 81.91 kPa, and the shock wave overpressure reaches its peak at an extended maximum time of 7.4 ms. The stress distribution on the approximate real tunnel wall is discontinuous, the propagation speed of stress waves in the bend tunnel is slower, and the duration of high load is relatively low. The displacement of the approximate real tunnel after gas explosion is lower than that of tunnels with smooth walls, and the displacement of most measuring points on the tunnel on the right is only 1/3–1/2 that of the smooth tunnel.

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Influence of U-shaped stiffeners on the blast-resistance performance of steel plates

Cited by 18 publications

References 29 publications

The Influence of Adiabatic Heat and Combined Blast Load and Fire Loading on the Response of Mild Steel Plates

The Influence of Adiabatic Heat and Combined Blast Load and Fire Loading on the Response of Mild Steel Plates

Numerical Study on the Dynamic Response of Gas Explosion in Uneven Coal Mine Tunnels Using CESE Reaction Dynamics Model

Numerical study on the dynamic response of gas explosion in uneven coal mine tunnels using LS DYNA CESE reaction dynamics model

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