An Experimental Technique for Spalling of Concrete

Zhang, L.; Hu, Shi; Chen, D.-X.; Zhang, Yu; Liu, F.

doi:10.1007/s11340-008-9159-8

Cited by 33 publications

(22 citation statements)

References 16 publications

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“…Because aramid fiber wave impedance is far less than the wave impedance of concrete [7][8][9], the shock waves attenuation rate from aramid fibers to the concrete is less than from aramid fiber into the concrete which is consistent with the results in table 2.…”

Section: Detonation Wave Propagation In Composite Materials Structuresupporting

confidence: 83%

Comparison between some materials composites in the shock wave attenuation and anti-detonation property

Fan

Wang

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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Abstract. Comparing the anti-detonation property and shock wave attenuation law of the single material structures, composite material structures and sandwich material structures are simulated by AUTODYN. The simulation on the structures with different combination show that, the aramid fiber material as base material in touched with the explosives, can greatly reduce the shock wave in identification board. For different material structures of the attenuation rule of shock wave, numerical simulation results show that the sandwich structure of the shock wave attenuation ability is more effectively than a single material structure. Based on the anti-detonation performance in different arrangement of the material structure, antidetonation structure optimization design scheme is given according to the simulation results.

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Section: Detonation Wave Propagation In Composite Materials Structuresupporting

confidence: 83%

Comparison between some materials composites in the shock wave attenuation and anti-detonation property

Fan

Wang

2018

IOP Conf. Ser.: Mater. Sci. Eng.

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“…The original pulse signal obtained from strain gauges on transmitter bar in a spalling test is shown in Figure 10. According to Zhang et al (2006Zhang et al ( , 2008, the spalling strength s p and loading-rate s  p can be calculated from the following expressions,…”

Section: Spalling Testsmentioning

confidence: 99%

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Zhang

Chen

et al. 2016

Lat. Am. j. solids struct.

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Based on dynamic direct tensile tests, splitting tests and spalling tests, it is found that the experimental tensile strength of concrete-like materials greatly increases with loading-rate. This kind of dynamic tensile strength enhancement may be caused by the combination influence of the inertia effect, real rate effect and end friction effect (here the end friction effect is only existed in splitting and spalling tests). To further investigate the influence degree of real rate effect for concrete-like materials in dynamic tensile tests, this paper conducts systematically dynamic tensile experiments, viz. dynamic direct tensile tests, splitting tests and spalling tests. At the same time, numerical dynamic tensile tests are employed to analyze the mechanical characteristics of concrete-like materials. A hydrostatic pressure dependent model, the DruckerPrager constitutive model, is used for concrete-like material specimens, which can consider the influence of inertia effect. In the numerical model, the specimen is set to be rate-independent, thus the predicted dynamic tensile strength of specimens is free of the real rate effect. The end friction effect is also taken into account in the numerical analysis of dynamic splitting and spalling tests. It is found that the dynamic tensile strength of concrete-like materials in numerical simulations does not varies obviously with the loading-rate, indicating that the inertia effect and end friction effect have little contributions to the dynamic tensile strength enhancement of concrete-like materials. Therefore, the real rate effect dominates the dynamic tensile strength enhancement of concretelike materials in laboratory tests, but the inertia effect and end friction effect do not. Keywords Real rate effect, tensile strength, concrete-like materials, experimental and numerical research researchers. The dynamic behavior of concrete-like materials is usually studied by laboratory such as split Hopkinson tension bar (SHTB) or split Hopkinson pressure bar (SHPB). Many experimental results show that the dynamic strength of concrete-like materials subjected to impact loading increases apparently with the loading-rate. The influence of the loading-rate or strain-rate on the dynamic strength enhancement of concrete-like materials obtained from experiments is called as the apparent rate effect. The dynamic performance of mortar under compressive and tensile loading was studied by Yang et al. (2015) based on splitting tests, and the results show that mortar is of rate sensitive. Cai et al. (2015) systematically conducted quasi-static and dynamic compressive tests to analyze the rate effect of granite, and numerical simulation method is employed to determine the true rate effect of granite through the uncoupled assumption of the rate effect, lateral inertia and end friction effect in SHPB tests. Lu et al. (2014) investigated the dynamic compressive behavior of recycled aggregate concrete specimens prepared with five different amount of recycled coarse aggregate [i.e. 0, 25...

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“…Experimental measure methods can be divided into two types, including direct and indirect tension testing. Among the direct tension testing methods, the split Hopkinson pressure bar tensile laboratory technique is widely used in concrete materials, which can perform the direct tension behaviours by the dynamic spalling . The SHPB spalling experiment system consists of a metal striker launched by air gun, an elastic metal pressure bar, and the testing cylindrical specimen is adhered to the elastic pressure bar.…”

Section: Introductionmentioning

confidence: 99%

“…Among the direct tension testing methods, the split Hopkinson pressure bar tensile laboratory technique is widely used in concrete materials, which can perform the direct tension behaviours by the dynamic spalling. [23][24][25] The SHPB spalling experiment system consists of a metal striker launched by air gun, an elastic metal pressure bar, and the testing cylindrical specimen is adhered to the elastic pressure bar. After the metal striker hits the elastic pressure bar, a compressive stress wave is induced and transmitted into the testing specimen, part of the stress wave is dissipated by the deformation of the specimen, and the other stress wave is reflected to the elastic pressure bar.…”

Section: Introductionmentioning

confidence: 99%

Dynamic splitting tensile properties of concrete and cement mortar

Liu

Zhou

et al. 2019

Fatigue Fract Eng Mat Struct

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To investigate the dynamic tensile behaviours of concrete and cement mortar, a 50‐mm split Hopkinson pressure bar was applied on Brazilian disc specimens for dynamic tensile experiments, in which strain rate varied from 10−5 to 20 s−1. The high‐speed camera testing technique was used to capture the dynamic fractured process of the specimens at relative high strain rate. The experimental results revealed that the dynamic tensile strength of concrete specimens has a stronger strain rate effect than that of cement mortar specimens. Then three typical failure patterns of the specimens were confirmed in dynamic experiments. In addition, one‐parameter semi‐empirical relation between dynamic tensile strength and strain rate was established. Finally, the limitation of dynamic splitting experiments on Brazilian disc specimens was discussed in detail at high strain rate, in which the crack initiates from the contact point between the incident bar and specimens rather than the centre of the specimens.

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An Experimental Technique for Spalling of Concrete

Cited by 33 publications

References 16 publications

Comparison between some materials composites in the shock wave attenuation and anti-detonation property

Comparison between some materials composites in the shock wave attenuation and anti-detonation property

Further Investigation on the Real Rate Effect of Dynamic Tensile Strength for Concrete-Like Materials

Dynamic splitting tensile properties of concrete and cement mortar

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