The current memory surface memorizes the maximum stress experienced by the material in loading history ,and indicates the hardening exent of the material ; The limit memory surface memorizes the maximum stress before destruction.
The effect of the parameters of forced Logistic map x n+1 =ax n(1-x n)+bcosωt on the torus destruction is studied in detail. Changing the parameter a will induce the system from torus doubing bifurcation to chaos;
To explore the penetrating generality and the phenomena while projectile penetrating concrete target, and explore limitary penetrating capability and the target destroyed situation while special projectile penetrating special concrete target, we designed two different length-diameter ratio reduced test-pieces of Earth PeneteatingWarhead based on 27.5kg Kinetic Energy Warhead and correspond concrete targets according to the technique indes of 38Z artillery and the restricts of the cellar size when the artillery perpendicularly launched down.
When Lorentz force and fluid flows were in the same direction, preferable effects of the lift suppression and the drag reduce can be obtained whereas, the characteristics of symmetry and stability of the vorticity distribution on the cylinder surface were destroyed.
The test results show the anti-penetration characteristic of the corundum-rubble concrete is excellent, and the projectiles penetrating into the corundum-rubble concrete are destroyed, deformed, or ricocheted.