The Experimental Studies On The Dynamic Response And Stability Of Cylindrical Shells Subject To Axial Impact

The stability of structure is a basic research task in solid mechanics all the time and is also one of the difficult problems which need to urgently solved in aerospace industry equipment now. The beam and cylindrical shell are the most common structural form. Compared with general structures, since for beams and cylindrical shells the geometrical equations are mostly simplified in forms, so the their buckling is playing an important role in structural stability, which has increased great development in the theories of structural stability. The studies on the dynamic response and stability of cylindrical shells subject to axial impact are investigated experimentally in this paper.1. The experimental studies on the cylindrical shell with different length were carried. During the experiment the time-history curves of distal end of the long shell were recorded by sensor. The strain on the certain position of the long shells were recorded by resistance strain-gauge rosette.2. The whole process of collapse is simulated using LS-DYNA computer codes. The strain and force associate with the long shells in the experimental are get. 3. The results of the experiments and the results of numerical simulation show a good agreement. The results of experiments and numerical simulation show that shell is in the plastic stage and generate elastic vibration subsequently until standstill. The cylinderical shell with longer lenth destabilizate with global bending collapse and the distal end of the cylinderical shell is in the plastic stage when the initial impact velocity is 7.75m/s.