Effect of Pre-Notch on Deformation of Aluminium Square Plate under Free Blast Loading

Effect of Pre-Notch on Deformation of Aluminium Square Plate under Free Blast Loading

Ali Arab, P.Chen, Yansong Guo, Baoqiao Guo, Qiang Zhou

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Abstract. In this paper the deformation and response of the Al square plate with pre-notch under free blasting loading were investigated. The blast loading process is a complex phenomenon, and accurate modeling, the prediction of deformation during this condition of loading is difficult, numerous investigations have carried out on the permanent deformation and the failure of various materials subjected to the blast; however, the transient deformation of plate subjected to the such intensely loaded has been difficult to measure due to the experimental difficulties. Recently, High speed imaging and 3D digital image correlation (3D DIC) have enabled the reliable none-contact measurement of the deformation and strain in various applications. In this research, 3D DIC method is used to study the effects of pre-notches on the dynamic deformation and rupture of thin Al square plates. The displacement and strain fields during the deformation were analyzed by this method. The Al square plate with the thickness of 3 mm and with different notch geometries were tested under the free blast loading by 20 gr of TNT. Two synchronized high-speed cameras were used to capture the response of the plate with an inter frame rate of 35000 frame/s. The result of test shows that the 3D DIC is a precise method to measure the full-field dynamic deformation of plate. The pre-notch possesses a direct effect on the maximum and final deformation of plate. Based on the result, the deformation occurs in the two stages; in the first one, the plate is deformed due to the shock impulse and all particles are forced to move out-of-plane and provided with initial velocities, and in the second one, pressure wave is vanished and deformation is occurred due to the imparted momentum.

3D DIC, Pre-Notch, Free Blast Loading

Published online 7/30/2019, 6 pages
Copyright © 2019 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA

Citation: Ali Arab, P.Chen, Yansong Guo, Baoqiao Guo, Qiang Zhou, Effect of Pre-Notch on Deformation of Aluminium Square Plate under Free Blast Loading, Materials Research Proceedings, Vol. 13, pp 109-114, 2019

DOI: https://doi.org/10.21741/9781644900338-19

The article was published as article 19 of the book Explosion Shock Waves and High Strain Rate Phenomena

Content from this work may be used under the terms of the Creative Commons Attribution 3.0 licence. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.

[1] Chen PW, Liu H, Ding YS, Guo BQ, Chen JJ, Liu HB. Dynamic Deformation of Clamped Circular Plates Subjected to Confined Blast Loading. Strain 2016;52:478–91. doi:10.1111/str.12190. https://doi.org/10.1111/str.12190
[2] Markose A, Rao CL. Mechanical response of V shaped plates under blast loading. Thin Walled Struct 2017;115:12–20. https://doi.org/10.1016/j.tws.2017.02.002
[3] Kumar P, Stargel DS, Shukla A. Effect of plate curvature on blast response of carbon composite panels. Compos Struct 2013;99:19–30. https://doi.org/10.1016/j.compstruct.2012.11.036
[4] Rakvåg KG, Underwood NJ, Schleyer GK, Børvik T, Hopperstad OS. Transient pressure loading of clamped metallic plates with pre-formed holes. Int J Impact Eng 2013;53:44–55. https://doi.org/10.1016/j.compstruct.2012.11.036
[5] Aune V, Valsamos G, Casadei F, Langseth M, B??rvik T. On the dynamic response of blast-loaded steel plates with and without pre-formed holes. Int J Impact Eng 2016;108:27–46. https://doi.org/10.1016/j.ijimpeng.2017.04.001
[6] Liu H, Chen PW, Guo BQ, Zhang SL, Liu HB, An EF. Deformation and Failure of Pre-Notched Thin Metal Plates Subjected to Confined Blast Loading. Appl Mech Mater 2015;782:49–58. https://doi.org/10.4028/www.scientific.net/amm.782.49
[7] Saburi T, Yoshida M, Kubota S. Dynamic strain distribution of FRP plate under blast loading. Int. Congr. High-Speed Imaging Photonics, vol. 10328, 2017, p. 103281N–6. https://doi.org/10.1117/12.2271148
[8] Tiwari V, Sutton MA, McNeill SR. Assessment of high speed imaging systems for 2D and 3D deformation measurements: Methodology development and validation. Exp Mech 2007;47:561–79. https://doi.org/10.1007/s11340-006-9011-y
[9] Hammer JT, Liutkus TJ, Seidt JD, Gilat A. Using Digital Image Correlation (DIC) in Dynamic Punch Tests. Exp Mech 2015;55:201–10. https://doi.org/10.1007/s11340-014-9924-9
[10] Ren P, Zhou J, Tian A, Zhang W, Huang W. Experimental and numerical investigation of the dynamic behavior of clamped thin panel subjected to underwater impulsive loading. Lat Am J Solids Struct 2017;14:978–99. https://doi.org/10.1590/1679-78253521
[11] Louar MA, Belkassem B, Ousji H, Spranghers K, Kakogiannis D, Pyl L, et al. Explosive driven shock tube loading of aluminium plates: Experimental study. Int J Impact Eng 2015;86:111–23. https://doi.org/10.1016/j.ijimpeng.2015.07.013
[12] Aune V, Fagerholt E, Hauge KO, Langseth M, Børvik T. Experimental study on the response of thin aluminium and steel plates subjected to airblast loading. Int J Impact Eng 2016;90:106–21. https://doi.org/10.1016/j.ijimpeng.2015.11.017
[13] Spranghers K, Vasilakos I, Lecompte D, Sol H, Vantomme J. Full-Field Deformation Measurements of Aluminum Plates Under Free Air Blast Loading. Exp Mech 2012;52:1371–84. https://doi.org/10.1007/s11340-012-9593-5
[14] Curry RJ, Langdon GS. Transient response of steel plates subjected to close proximity explosive detonations in air. Int J Impact Eng 2017;102:102–16. https://doi.org/10.1016/j.ijimpeng.2016.12.004