Impact torsional buckling of plastic circular cylindrical shells: Experimental study

✍ Scribed by Hongwei Ma; Shanyuan Zhang; Guitong Yang

• Publisher: Elsevier Science
• Year: 1999
• Tongue: English
• Weight: 270 KB
• Volume: 22
• Category: Article
• ISSN: 0734-743X
• DOI: 10.1016/s0734-743x(98)00055-4

✦ Synopsis

In this paper, the experimental studies are carried out on the dynamic plastic buckling of circular cylindrical shells under impact torque. The experimental results of static plastic torsional buckling of circular cylindrical shells are given first. The distinction between loss of uniqueness and loss of stability elucidated by Shanley is verified. The experiments of impact buckling are made on the Hopkinson torsional bar. The torsional bar generates a rectangular impulsive torque which is to be applied on the shells. With the B-R criterion, the dynamic critical torque of the shells is determined. The dynamic critical torque is higher than the static critical torque for the same shell. On the basis of experiments, the conclusion which Shanley's non-unloading hypothesis can be used in dynamic plastic buckling problems is given.