Split-Hopkinson Pressure Bar Test and Numerical Simulation of Steel Fiber-reinforced High-strength Concrete

Fiber-reinforced polymer (FRP) has become increasingly popular in repairing existing steel-reinforced concrete (RC) members or constructing new structures. Although the quasi-static axial compression performance of FRP-confined concrete (FCC) has been comprehensively studied, its dynamic compression performance is not well understood, especially the dynamic compressive behavior of FRP-confined high-strength concrete (FCHC). This paper presents an experimental program that consists of quasi-static compression tests and Split-Hopkinson Pressure Bar (SHPB) impact tests on FRP-confined high-strength concrete. The effects of the FRP types, FRP confinement stiffness, and strain rate on the impact resistance of FCHC are carefully studied. The experimental results show that the strain rate effect is evident for FRP-confined high-strength concrete and the existence of the FRP greatly improves the dynamic compressive strength of high-strength concrete. An existing strength model is modified for impact strength of FCHC and the predicted results are compared with the test results. The results and discussions show that the proposed model is accurate and superior to the existing models.

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Suppression of adiabatic shear band formation by martensitic transformation of retained austenite during split Hopkinson pressure bar test for a high-strength bainitic steel

Materials Science and Engineering A ◽

10.1016/j.msea.2021.141127 ◽

2021 ◽

pp. 141127

Author(s):

Selim Kim ◽

Min Cheol Jo ◽

Dong Woo Suh ◽

Hong Kyu Kim ◽

Seok Su Sohn ◽

...

Keyword(s):

Split Hopkinson Pressure Bar ◽

Adiabatic Shear Band ◽

High Strength ◽

Bainitic Steel ◽

Hopkinson Pressure Bar ◽

Band Formation ◽

Adiabatic Shear Band Formation ◽

Split Hopkinson ◽

Bar Test ◽

Pressure Bar

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Properties and Structure of X30MnAlSi26-4-3 High Strength Steel Subjected to Dynamic Compression Processes

Archives of Metallurgy and Materials ◽

10.1515/amm-2017-0332 ◽

2017 ◽

Vol 62 (4) ◽

pp. 2255-2260 ◽

Cited By ~ 1

Author(s):

A. Śmiglewicz ◽

M. Jabłońska ◽

W. Moćko ◽

K. Kowalczyk ◽

E. Hadasik

Keyword(s):

Plastic Deformation ◽

Split Hopkinson Pressure Bar ◽

Dynamic Compression ◽

True Strain ◽

High Strength ◽

Hopkinson Pressure Bar ◽

Structure Changes ◽

Split Hopkinson ◽

Bar Test ◽

Pressure Bar

Abstract The paper presents the results of investigation on X30MnAlSi26-4-3 austenitic steel subjected to dynamic compression using the split Hopkinson pressure bar. The strain rate was 3700 s−1. The compression test was also carried out without the use of breaking rings and then true strain was about 0.3. The split Hopkinson pressure bar test take only few milliseconds to complete during which time it is impossible to transfer the excess heat out of the specimen, therefore the test must be carried out in adiabatic conditions and so the increase of the temperature caused by the work of plastic deformation had to be calculated. The stepping load method was used in order to evaluate the effect of adiabatic heating on the properties of steel which allowed to maintain the isothermal deformation conditions. The paper presents the comparison of results obtained during deformation under adiabatic and isothermal conditions in correlation to structure changes occurring in course of dynamic compression.

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