Numerical simulation of high strain rate concrete compression tests

Tedesco, Joseph W.; Hughes, Mary L.; Ross, C. A.

doi:10.1016/0045-7949(94)90037-x

Cited by 48 publications

(44 citation statements)

References 7 publications

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“…The pressure loading shape is trapezium. The stress level is 80 MPa, same as the loading case 2 in Tedesco's paper (Tedesco et al, 1994). The rising time is 23 ls, and the duration is 220 ls.…”

Section: Detailed Simulation Of Shpb Testmentioning

confidence: 97%

“…The blue area denotes the concrete specimen, and the purple areas are the pressure bars, only part of the bars are Axis specimen Incident bar Transmitter bar shown in the figure. The geometry and the material parameters are assumed to be the same as that in Tedesco et al (1994). That is, the diameters for the pressure bars and the specimen are 0.0508 m; the length of the specimen is also 0.0508 m, and the length of the pressure bars are 1.3208 m. According to Tedesco's paper (Tedesco et al, 1994), the uniaxial compressive strength of the concrete is 57.7 MPa.…”

Section: Detailed Simulation Of Shpb Testmentioning

confidence: 99%

“…The direct compression Split Hopkinson Pressure Bar (SHPB) technique (Kolsky, 1949) is a popular way to measure the dynamic compression strength enhancement of concrete-like materials at high strain rate. Extensive experimental results have shown that the dynamic uniaxial compressive strength increased with the increase of the strain rate (Bischoff and Perry, 1991;Ross et al, 1989;Grote et al, 2001;Tedesco et al, 1994;Georgin and Reynouard, 2003;Li and Meng, 2003). Typically, 0020-7683/$ -see front matter Ó 2008 Elsevier Ltd. All rights reserved.…”

Section: Introductionmentioning

confidence: 95%

“…1 (Tedesco et al, 1994). The system consists of a striker bar (which is propelled by a gas gun), an incident pressure bar, a transmitter pressure bar and a short material specimen sandwiched between them.…”

Section: Shpb Techniquementioning

confidence: 99%

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Modelling of compressive behaviour of concrete-like materials at high strain rate

Zhou

Hao

2008

International Journal of Solids and Structures

374

147

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a b s t r a c tUniaxial compression tests are the most common tests for characterizing the strength of concrete-like materials. The dynamic compression strength of concrete-like material is typically obtained by Split Hopkinson Pressure Bar (SHPB) tests. The increase in material strength under dynamic loading is usually attributed to the strain rate effect and modelled with a dynamic increase factor (DIF). However, it was observed by some researchers that the radial inertial confinement caused apparent increase of dynamic strength of concrete-like specimen in SHPB tests. They attributed the material strength increase to this inertial effect, instead of the strain rate effect. In the present study, numerical analyses are performed to investigate the compressive behaviour of concrete-like material at high strain rates. A homogeneous macroscale model and a heterogeneous mesoscale model are developed in the study. In the macroscale model, the material is assumed to be homogeneous and isotropic. In the mesoscale model, the test sample is modelled as a threephase composite consisting of aggregate, mortar matrix and interfacial transaction zone (ITZ) between the aggregate and the mortar matrix. The aggregate is assumed to be circular and the ITZ is modelled as a thin boundary around the aggregate. In the both models, the materials are assumed to be insensitive to the strain rate first. Therefore, the obtained strength enhancement is only due to the inertial confinement. Strain rate sensitive material properties are then used in the two models in the calculations. Numerical simulations of the concrete samples under compression at different strain rates are carried out. The relative contribution of the inertial effect and the strain rate effect on the compressive strength DIF is examined based on the numerical results. The failure process of concrete specimen is also studied.

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Section: Detailed Simulation Of Shpb Testmentioning

confidence: 97%

Section: Detailed Simulation Of Shpb Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 95%

Section: Shpb Techniquementioning

confidence: 99%

See 2 more Smart Citations

Modelling of compressive behaviour of concrete-like materials at high strain rate

Zhou

Hao

2008

International Journal of Solids and Structures

374

147

View full text Add to dashboard Cite

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“…Therefore, relevant constitutive equations that take into account strain rate sensitivity are a major concern in several engineering applications [1]. Consequently, numerous works studied the dynamic response of materials in compression [2][3][4][5][6][7], tension [6][7][8][9][10][11][12][13][14][15][16], shear [17][18][19][20][21] and multi-axial [22].…”

Section: Introductionmentioning

confidence: 99%

Finite-element analysis of errors on stress and strain measurements in dynamic tensile testing of low-ductile materials

Koubaa¹,

Othman²,

Zouari³

et al. 2011

Computers & Structures

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International audienceTensile dynamic tests are essential experiments to develop and validate constitutive equations. In this paper, we studied the errors on stress and strain measurement in dynamic tensile tests by using finite-element analysis. Two strain and one stress measures were discussed. Mainly, we considered the influence of the material and multiple geometrical and testing parameters. We were limited to the case of elastic behaviour of the material. We observed that the errors on the strain measures are essentially influenced by the geometrical parameters. On the other hand, the error on the stress measure are highly correlated to stress field homogeneity

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RETRACTED ARTICLE: Determination of the radial inertia-induced transition strain-rate in split Hopkinson pressure bar tests

2011

J Mech Sci Technol

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The transition strain-rate represents the start of significant contributions from radial inertia-induced lateral confinement to the axial compressive strength of the tested materials. However, it has been misinterpreted for decades by many studies as the start of significant strain-rate effect on the dynamic uniaxial compressive strength of the tested materials. Based on the dimensional analysis and numerical and experimental data, a semi-empirical formula to determine the transition strain-rates for various engineering materials is proposed. Errors in SHPB tests due to the contribution of the lateral confinement effect are estimated. It is found that, except for metals, transition strain-rates of concrete-like, rock-like and polymeric materials are unfortunately located in the valid range of SHPB tests that has been commonly accepted by research communities. Thus SHPB tests cannot be treated as valid measurements under uniaxial stress state when strain-rates are greater than the transition strain-rate.

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Numerical simulation of high strain rate concrete compression tests

Cited by 48 publications

References 7 publications

Modelling of compressive behaviour of concrete-like materials at high strain rate

Modelling of compressive behaviour of concrete-like materials at high strain rate

Finite-element analysis of errors on stress and strain measurements in dynamic tensile testing of low-ductile materials

RETRACTED ARTICLE: Determination of the radial inertia-induced transition strain-rate in split Hopkinson pressure bar tests

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