Experimental Studies of the Dynamic Strain Produced in the Circular Ring Targets Bombarded by Electron Beam

The dynamic strain is an important mechanic parameter of the structural response produced in the target structure bombarded by electron beam. In this paper, the experimental studies of the dynamic strain produced in the circular ring targets bombarded by electron beam on FLASH-Ⅱ equipment during the recent years are described. The target material is LY-12 aluminum alloy with thicknesses 2.5~3 mm. The range of energy fluxex on targets is 50~60 J/cm2. The experimental results show that the strain values attained is 1.6104 on the centre of the inner-surface of the bombarded part in the circular rings, while the range of strain is (0.45~0.65)104 on the inner-surface of two sides in the circular rings.