Spallation Analysis of Concrete Under Pulse Load Based on Peridynamic Theory
Spallation analysis is one of important research directions in impact dynamics. By combining the newly developing Peridynamics (PD) theory, the spallation phenomenon of concrete is numerically simulated using C language and MATLAB programming. The factors that may affect the spalling are verified: the type of pulse load, the geometric size of the model and the action time of pulse load. The dynamic response of spallation of three-dimensional concrete columns under different pulse loading forms (rectangular pulse, triangular pulse and exponential pulse) is analyzed. (1) Under the same impulse effect, only one spalling occurs in the rectangular pulse, and no multiple spallation occurs when the pulse amplitude increase. Exponential and triangular pulses can produce multiple spallation phenomena, and the time for the first spallation phenomenon is rectangular pulse < triangle pulse < exponential pulse. (2) The effect of the same linear triangle pulse on spalling of concrete columns with different lengths (100 mm, 200 mm and 300 mm) is analyzed. The triangle pulse can cause single or multiple spallation, which is related to the length and size of the model. (3) Finally, by changing the number of time steps of the pulse load, the different spalling phenomena of triangular pulses are analyzed. The thickness of the first layer increases significantly with the increase of the action time.
KeywordsPulse load Spallation Peridynamics Energy release rate Concrete column
The authors gratefully acknowledge the financial support from Sicence and Technology Project of Guizhou Province (No.LH7624) and International Cooperation Project of Guizhou Province (No.G7006) and Doctoral Foundation of Guizhou University (No. 20) and Sicence and Technology Project of Guizhou Province (黔科合支撑  2886) and Guizhou international science and technology cooperation base project: Guizhou optoelectronic information and intelligent application International Joint Research Center (qiankehe platform talents  5802).
- 1.Hopkinson, B. (1914). A method of measuring the pressure produced in the detonation of high, explosives or by the impact of bullets. Philosophical Transactions of the Royal Society of London. Series A, Containing Papers of a Mathematical or Physical Character,213, 497–508.Google Scholar
- 5.Zhang, L., Hu, S. S., Chen, D. X., Zhang, S. B., Yu, Z. Q., & Liu, F. (2009). Spall fracture properties of steel-fiber-reinforced concrete. Explosion and Shock Waves,29(2), 119–124.Google Scholar
- 14.Zuo, Y. J., Zhu, W. C., Tang, C. A., Li, X. B., & Wang, W. H. (2006). Numerical simulation on spallation process of inhomogeneous medium induced by reflection of stress wave. Journal of Central South University (Science and Technology),37(6), 1177–1182.Google Scholar
- 21.Hassan, M., & Wille, K. (2017). Experimental impact analysis on ultra-high performance concrete (UHPC) for achieving stress equilibrium (SE) and constant strain rate (CSR) in Split Hopkinson pressure bar (SHPB) using pulse shaping technique. Construction and Building Materials,144, 747–757.CrossRefGoogle Scholar
- 26.Wang, L. L. (1985). Stress wave foundation. Beijing: National Defense Industry Press.Google Scholar
- 27.Zhan, X. J., & Shu, D. Q. (2003). Spalling phenomena analysis of brittle materials under three kinds of impulse loads. Journal of Wuhan University of Hydraulic and Electric Engineering,36(2), 45–48.Google Scholar