Misalignment effect of Split Hopkinson Pressure Bar (SHPB) / Zurri Adam Mohd Adnan ... [et al.]

Mohd Adnan, Zurri Adam and Yahaya, Mohd Azman and Mahmud, Jamaluddin and Othman, Mohd Zaid and Tan, Kean Sheng (2019) Misalignment effect of Split Hopkinson Pressure Bar (SHPB) / Zurri Adam Mohd Adnan ... [et al.]. Journal of Mechanical Engineering (JMechE), SI 8 (1). pp. 140-152. ISSN 18235514


Split Hopkinson Pressure Bar (SHPB) testing set-up is one of the mechanical testing that commonly used to determine the dynamic stress behaviour of materials. The most important step in order to get accurate and reliable data is the quality of calibration process. Even though the test has been widely used, but there is still lack of information on how the testing set-up being calibrated. This paper is focused on misalignment calibration of SHPB test set-up. Tests were conducted using 200 mm striker bar at velocity of 22m/s without specimen. Results with misalignment and without misalignment cases were compared. The results with misalignment shows major fluctuation occur at the baseline for incident bar signal due to the height offset misalignment between the bars. Then, the incident bar is adjusted to a height of 156.78mm to ensure not in misalignment position using levelling gauge which results in good trapezoidal shape of bar signal with minor fluctuating baseline. Similar shape and baseline were achieved for both cases up until 368 µɛ, however major fluctuation in negative incident strain called reflected strain occur due to height offset misalignment. The magnitude of bar signal, µɛ (micro strain) are similar up to 368 µɛ for both cases due to similar impact velocity. Misalignment of SHPB bar contributes to fluctuation of the wave beyond 368 µɛ.


Item Type: Article
Email / ID Num.
Mohd Adnan, Zurri Adam
Yahaya, Mohd Azman
Mahmud, Jamaluddin
Othman, Mohd Zaid
Tan, Kean Sheng
Subjects: T Technology > TJ Mechanical engineering and machinery
T Technology > TJ Mechanical engineering and machinery > Hydraulic machinery
Divisions: Universiti Teknologi MARA, Shah Alam > Faculty of Mechanical Engineering
Journal or Publication Title: Journal of Mechanical Engineering (JMechE)
UiTM Journal Collections: UiTM Journal > Journal of Mechanical Engineering (JMechE)
ISSN: 18235514
Volume: SI 8
Number: 1
Page Range: pp. 140-152
Keywords: SHPB; Dynamic Stress; Calibration; Low Impact Loading
Date: 2019
URI: https://ir.uitm.edu.my/id/eprint/42007
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