Modelling of dynamic behaviour of concrete materials under blast loading

Lu, Yong; Xu, Kai

doi:10.1016/j.ijsolstr.2003.09.019

Cited by 125 publications

(46 citation statements)

References 14 publications

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“…All models predict a decrease in mean fragment dimension with increasing strain rate, in agreement with general observations on dynamically fragmenting solids [49]. Decreasing fragment sizes with increasing strain rate have been predicted elsewhere specifically for concrete and mortar [66].…”

Section: Energetic Approachsupporting

confidence: 86%

A model for deformation and fragmentation in crushable brittle solids

Clayton

2008

International Journal of Impact Engineering

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Section: Energetic Approachsupporting

confidence: 86%

A model for deformation and fragmentation in crushable brittle solids

Clayton

2008

International Journal of Impact Engineering

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“…The peak stress of each mean curve is also presented in Table 2. The results of the CDIF in Table 2 are then curve-fitted using the least square method (with correlation factor R 2 = 0.96) as 0.28 Figure 4 compares the simulated CDIFstrain rate relation with the experimental data [1,3] and the two empirical curves [5,18]. The simulation results are well within the documented data, indicating that the XCTimage based models are capable of simulating the dynamic responses of concrete.…”

Section: Dynamic Compressive Strengths From Mcssmentioning

confidence: 76%

X-Ray Computed Tomography Image-Based Meso-scale Dynamic Fracture of Concrete Under Compression: Monte Carlo Simulations

Huang¹,

Yang²,

Liu³

2016

Proceedings of the 9th International Conference on Fracture Mechanics of Concrete and Concrete Structures

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Meso-scale two-dimensional (2D) finite element models are developed for fracture modelling in concrete based on images from an in-situ micro-scale X-ray Computed Tomography test. The concrete damaged plasticity model is employed to capture the dynamic fracture mechanical behavior of concrete under uniaxial compression. By Monte Carlo simulations, the present study statistically focuses on the effects of loading rate as well as heterogeneity of mesostructure on the macroscopic mechanical properties and the failure patterns of concrete. The calculated dynamic increase factors are in good agreement with experimental results and empirical predictions. Cracks in high strain rate cases are more likely to connect voids and form dense damage network within the whole specimen. It is also suggested that the internal defects should be minimized for optimal material design especially when structures are exposed to high strain rates.

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“…In this study, the concrete dynamic strength change with strain rate is modelled based on a theoretical model [8] in conjunction with a collection of experimental results [9][10][11][12], as shown in Figure 1. The function can be approximated as…”

Section: Debris Velocity Of Concrete Structuresmentioning

confidence: 99%

Debris velocity of concrete structures subjected to explosive loading

2006

Int. J. Numer. Anal. Meth. Geomech.

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SUMMARYWhen designing above-ground ammunition storage facilities, one has to take into account the debris hazard resulting from accidental explosions. The purpose of this paper is to develop a predictive method for debris dispersion around an ammunition storage site in case of an accidental detonation in a reinforced concrete storage structure. The concrete slabs/walls break up into debris when it is overloaded by the internal blast. The debris velocity is one of the important parameters to describe the debris dispersion. The parameters that affect the debris velocity are complex. This study adopts the energy approach to simplify the formulation. The failure process in a relatively thin concrete slab/wall is treated using the concept of expansion. Based on energy conservation, a general formula is derived for the debris launch velocity in a cubicle structure subjected to internal blast loading. The dynamic strength of concrete and reinforcement are considered in the fracture process. The analytical results are found to be consistent with the relevant experimental results.

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Modelling of dynamic behaviour of concrete materials under blast loading

Cited by 125 publications

References 14 publications

A model for deformation and fragmentation in crushable brittle solids

A model for deformation and fragmentation in crushable brittle solids

X-Ray Computed Tomography Image-Based Meso-scale Dynamic Fracture of Concrete Under Compression: Monte Carlo Simulations

Debris velocity of concrete structures subjected to explosive loading

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