| Abstract: | The problem of the axisymmetric pulsed deformation of a composite shell of revolution and complex geometric shape is solved in the two-dimensional statement. The problem was solved numerically using the Wilkins explicit finite-difference scheme. The results obtained from the one-dimensional and two-dimensional theories, on the basis of which it is concluded that for ultrashort-term loadings with a duration of approximately 10–1–10–2  sec, the influence of stress risers is manifested only in the immediate proximity of points of abrupt change in the body's geometry (corner points), are compared. Here, the stress calculation must be performed in accordance with two-dimensional equations, since the onedimensional equations yield values on the low side in certain cases. In sections that are 1 mm and more distant from the corner points, it is possible to use the one-dimensional theory, since the error in stresses, which is obtained in this case, goes into the factor of safety.Institute of Strength Problems, Academy of Sciences of the Ukrainian SSR, Kiev. Moscow Institute of Thermotechnics. Translated from Problemy Prochnosti, No. 10, pp. 68–71, October 1989. |
