Crack Propagation in PMMA Plates under Various Loading Conditions
The experimental results of the dynamics of crack propagation in polymethylmethacrylate plates under quasi-static and dynamic loading are presented. Registration of the cracks was made by the method of slit-scanning of an image using a streak camera. Either a crack trajectory or caustic at the crack front was recorded in the experiments. It is shown that crack front extension has a stepwise character for any type of loading. However the average speed at the quasi-static loading increases smoothly up to the maximum value, and the average speed at pulsed loading takes the maximum value rather instantly. The value of the stress intensity factor at the moment of crack start under dynamic loading essentially exceeds the corresponding value for quasi-static loading. Furthermore, under dynamic loading, the crack speed depends on the thickness of the sample.
Crack propagation Dynamic loading Quasi-static loading
Ivan Smirnov Yuri Sudenkov
St.Petersburg State University,198504,Russia
国际会议
北京
英文
1-10
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）