Analyses of the penetration process considering mass loss |
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| Authors: | LL He XW Chen |
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| Affiliation: | 1. Department of Modern Mechanics, University of Science and Technology of China, Hefei, Anhui 230027, China;2. Institute of Structural Mechanics, China Academy of Engineering Physics, P.O. Box 919-401, Mianyang, Sichuan 621900, China;1. Structural Impact Laboratory (SIMLab), Centre for Research-based Innovation (CRI) and Department of Structural Engineering, Norwegian University of Science and Technology, NO-7491 Trondheim, Norway;2. Norwegian Defence Estates Agency, Research & Development Department, NO-0103 Oslo, Norway;3. SINTEF Materials & Chemistry, NO-7465 Trondheim, Norway;1. Austin Hospital, Melbourne, Australia;;2. Epworth Healthcare, Melbourne, Australia;;3. Alfred Hospital, Melbourne, Australia;;4. Baker IDI Heart and Diabetes Institute, Melbourne, Australia;;5. Royal Adelaide Hospital, Adelaide, Australia;;6. Princess Alexandra Hospital, Brisbane, Australia;;7. Gosford Hospital, Gosford, Australia;;8. Peter MacCallum Cancer Centre, Melbourne, Australia;;9. Monash Health, Clayton, Melbourne, Australia;;10. School of Clinical Sciences at Monash Health, Monash University, Clayton, Melbourne, Australia;;11. Hollywood Medical Centre, Perth, Australia;;12. Box Hill Hospital, Melbourne, Australia;;13. Royal Hobart Hospital, Hobart, Australia;;14. Canberra Hospital, Canberra, Australia;;15. Royal Melbourne Hospital, Melbourne, Australia;;16. St Vincent''s Hospital, Melbourne, Australia;;17. Royal Prince Alfred Hospital, Sydney, Australia;18. Calvary Mater Hospital, Newcastle, Australia;1. Université Paris 13, Sorbonne-Paris-Cité, LSPM (UPR 3407), CNRS, 99 Avenue Jean-Baptiste Clément, 93430 Villetaneuse, France;2. Université Paris Est, ICMPE (UMR 7182), CNRS, UPEC, 94320 Thiais, France |
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| Abstract: | Based on the dynamic cavity-expansion theory and momentum theorem, the key parameters of projectile penetrating into concrete target, i.e., the penetration time and time histories of DOP, deceleration, mass loss, instant mass loss rate and nose shape, are obtained by incremental calculation considering mass loss of projectile. The calculation results are consistent with the experimental results. Due to the mass loss and thus nose blunting effects, the pulse shape of deceleration may be quite different from that obtained in the analysis of a rigid projectile, and then the dissimilarity is analyzed. It is found that the pulse shape of deceleration is determined by the drag force and essentially determined by the performances of target and projectile, i.e., the shear strength of target, the Moh’s hardness of aggregate in concrete and the CRH value of projectile nose. Further analysis indicates that the pulse shape of deceleration is more sensitive to the performance of target than that of projectile. |
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