Journal ArticleDOI
Fracture energy of concrete at high loading rates in tension
Ahmed Brara,J.R. Klepaczko +1 more
TLDR
The effect of high loading rates in tension on the failure energy and strength of concrete is reported in this article, where it is shown that at high loading rate, or strain rates, the failure energies of micro-concrete, as well as the strength, substantially increase.About:
This article is published in International Journal of Impact Engineering.The article was published on 2007-03-01. It has received 112 citations till now. The article focuses on the topics: Ultimate tensile strength & Split-Hopkinson pressure bar.read more
Citations
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Journal ArticleDOI
Numerical simulation of dynamic tensile-failure of concrete at meso-scale
TL;DR: In this article, the effects of loading rate and heterogeneity of meso-/micro-structure on the failure pattern and the macroscopic mechanical properties of concrete are investigated.
Journal ArticleDOI
Numerical studies of the combined effects of blast and fragment loading
Ulrika Nyström,Kent Gylltoft +1 more
TL;DR: In this article, a numerical simulation tool was used to further study the combined blast and fragment loading effects on a reinforced concrete wall, and the results showed that the overall damage of the wall strip subjected to combined loading was more severe than if adding the damages caused by blast and fragmentation loading treated separately, which also indicates the synergetic effect of the combined loading.
Journal ArticleDOI
A review on split Hopkinson bar experiments on the dynamic characterisation of concrete
TL;DR: In this paper, the behavior of different reinforced and unreinforced concrete, and also various UHPCs with and without fiber are comprehensively reviewed based on experiments by Split Hopkinson Pressure Bar (SHPB).
Journal ArticleDOI
Fracture behaviour of high-strength concrete at a wide range of loading rates
TL;DR: In this article, three-point bending tests on notched beams of a high-strength concrete have been conducted using both a servo-hydraulic machine and a self-designed drop-weight impact device.
Journal ArticleDOI
Modifications of RHT material model for improved numerical simulation of dynamic response of concrete
Zhenguo Tu,Yong Lu +1 more
TL;DR: In this article, a more in-depth evaluation of the RHT model is provided and modifications to the model formulation are proposed to enhance the performance of the model as implemented in the hydrocode AUTODYN.
References
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Journal ArticleDOI
Compressive behaviour of concrete at high strain rates
P. H. Bischoff,S. H. Perry +1 more
TL;DR: Experimental techniques commonly used for high strain-rate testing of concrete in compression, together with the methods used for measurement and recording of stress and strain, are critically assessed in the first part of this paper as discussed by the authors.
Journal ArticleDOI
A critical study of the Hopkinson pressure bar
TL;DR: In this paper, an electrical method for measuring the relation between pressure and time in experiments on high pressures of short duration was described, where the pressure is applied normally to one end of a cylindrical steel bar, producing a stress pulse which gives rise to radial and longitudinal displacements in the bar.
Journal ArticleDOI
Review of Strain Rate Effects for Concrete in Tension
L. Javier Malvar,C. Allen Ross +1 more
TL;DR: In this article, a literature review was conducted to determine the extant data characterizing the effects of strain rate on the tensile strength of concrete, and additional new data by Ross and colleagues were considered.
Journal ArticleDOI
An experimental method for dynamic tensile testing of concrete by spalling
J.R. Klepaczko,Ahmed Brara +1 more
TL;DR: In this paper, a new application of the spalling phenomenon in long specimens is reported, based on an experimental setup which consists of an air launcher of cylindrical projectiles with a Hopkinson bar as a measuring tool and a relatively long concrete specimen in contact with the bar.
Journal ArticleDOI
Strain rate effects on dynamic fracture and strength
David E. Lambert,C. Allen Ross +1 more
TL;DR: In this article, an experimental procedure and accompanying theoretical analysis is presented to produce a well-characterized technique for quantifying dynamic fracture properties of quasi-brittle materials, and the results show that the effective fracture toughness and specimen strength both increase significantly with loading rate.