DESIGN, SET UP AND TESTING OF SPLIT HOPKINSON BAR TO EVALUATE FLOW STRESS IN COPPER AT HIGH STRAIN RATES

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ETEMADI E.; ZAMANI J.; MOUSAVI M.V.; FRANCESCONI A.

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Journal: JOURNAL OF ENERGETIC MATERIALS Year:2014 | Volume:9 | Issue:2 (23) Page(s): 3-13

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Title

DESIGN, SET UP AND TESTING OF SPLIT HOPKINSON BAR TO EVALUATE FLOW STRESS IN COPPER AT HIGH STRAIN RATES

Author(s)

ETEMADI E. | ZAMANI J. | MOUSAVI M.V. | FRANCESCONI A. | Issue Writer Certificate

Keywords

FLOW STRESSQ2

STRAIN RATEQ2

FCC METALQ2

SPLIT HOPKINSON TESTQ2

FINITE ELEMENTQ2

Abstract

This paper presented a method to investigate plastic deformation of FCC METALs in high STRAIN RATEs. Experimental set up included two stages gas gun, spherical projectile and target assembly. Target assembly included front plate, two pressure bars, specimen, three frames and rigid holder. The proposed method is based on designing and optimizing of split Hopkinson bar to evaluate stress-strain diagrams in oxygen-free high thermal conductivity copper. Modifications included sketch of experiments to achieve plane stress waves in input pressure bar. The experimental results were compared with 3D FINITE ELEMENT simulation. Also, the effect of projectile velocity, specimen thickness, front plate thickness and distance between impacted projectile and center of front plate were investigated. It was concluded that decreasing specimen thickness and appropriate calibration of gas gun to shot projectile to the center of front plate, are appropriate ways to achieve STRAIN RATEs more than 104 s-1 in the specimen.

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APA: Copy

ETEMADI, E., ZAMANI, J., MOUSAVI, M.V., & FRANCESCONI, A.. (2014). DESIGN, SET UP AND TESTING OF SPLIT HOPKINSON BAR TO EVALUATE FLOW STRESS IN COPPER AT HIGH STRAIN RATES. JOURNAL OF ENERGETIC MATERIALS, 9(2 (23)), 3-13. SID. https://sid.ir/paper/115300/en

Vancouver: Copy

ETEMADI E., ZAMANI J., MOUSAVI M.V., FRANCESCONI A.. DESIGN, SET UP AND TESTING OF SPLIT HOPKINSON BAR TO EVALUATE FLOW STRESS IN COPPER AT HIGH STRAIN RATES. JOURNAL OF ENERGETIC MATERIALS[Internet]. 2014;9(2 (23)):3-13. Available from: https://sid.ir/paper/115300/en

IEEE: Copy

E. ETEMADI, J. ZAMANI, M.V. MOUSAVI, and A. FRANCESCONI, “DESIGN, SET UP AND TESTING OF SPLIT HOPKINSON BAR TO EVALUATE FLOW STRESS IN COPPER AT HIGH STRAIN RATES,” JOURNAL OF ENERGETIC MATERIALS, vol. 9, no. 2 (23), pp. 3–13, 2014, [Online]. Available: https://sid.ir/paper/115300/en

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