Analysis of the Microcrack Toughened Under the Dynamic Loading
Ge Dongyun(1),Lu Mingwan(1),Liu Yuanyong(2)
(1 Department of Engineering Mechanics of Tsinghua University, Beijing, 100084, P. R. China)
(2 Civil Aviation Engineering College of Northwestern Polytechnical University, Xi'an, Shaanxi, 710072, P. R. China)

Abstract: On the basis of experimental study, the micro-statistic mechanics was used to analyze the toughening mechanism of the microcrack. The toughening mechanism of the microcrack under dynamic loading was studied and made the simulation by the finite element method. The result reveals that under the dynamic loading, the toughening mechanism of the microcrack is the microcrack nucleated very fast. In order to improve the toughening property, the critical value of the toughening materials must be increased. 
Keywords: microcrack, dynamic toughness, toughened particle.