Aimed at the penetrating destroy of fragment for exploder,compares and analyses the consistency among three penetrating expressions:Christman-Gehring(C-G),penetration of target,crater cubage description.
For oval-headed projectile penetrate half-infinite concrete, adopting dimensional analysis, establishing the Function relation of related parameter having on dimension turns, through the experiment of oval-headed projectile (Quantity is 2.85 Kg, Diameter is 50.8 mm) penetrating concrete, Obtaining the equation of penetration depth.
In order to predict accurately the responses of concrete materials and structures under dynamic loads, it is important to identify dominant mechanisms of the penetration and perforation and failure modes of concrete.
Based on the leakbeforebreak (LBB) analysis of structures in nuclear reactors, the fatigue growth problem of semielliptical surface cracks of pressurized pipes and vessels subjected to cyclic loading is studied by means of the damage mechanics methods. Some essential features of propagation, penetration and shape development of surface cracks under different initial aspect ratios and loading conditions are obtained.
It has potential to reduce physical skin penetration by injection and provide potentially effective vaccines.
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Results showed that the NW and CCA treatments made the wood surface more hydrophobic while the NS treatment had the reverse effect on the wood surface mainly owing to the increased penetration of earlywood.
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Effect of different drying methods on liquid penetration of Chinese fir plantation wood
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The maximum amount of dyeing solution uptake by the capillary rising method was used to evaluate the liquid penetration of the treated wood.
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The results show that liquid penetration of Chinese fir sapwood after RFVD is significantly higher than that after KD and HTD.
In this paper, the constraint conditions of think perforated plate ligament and corresponding bimoment in the ligament section are described. From these considerations theoretical formulae for calculating effective elastic constants of thick perforated plates with triangular penetration pattern are obtained. Theoretical values obtained from these formulae are in good agreement with Sampson's experimental results and. Slot's numerical solution.
Fulfilling the nonlinear boundary conditions and applying Green's theorem,a vertical water exit problem which includes various stages such as underwater motion, approaching the free surface, and penetration for an arbitrary axisymmetric body has been solved with a numerical procedure in the present paper. Computations have been applied to the vertical water exit for a series of ellipsoids with various ratio of length to diameter at various Froude numbers. Comparisons between the computed results and t...
In this paper the switch of constraining the motion of slide line is discussed for simulation of plug phenomena in penetration damage.A certain quantity of plastic strain strength is used as the switch. The results of numerical simulation show that the switch of plastic strain strength is preferable to the switch of shear yield, and it seems more suitable for practial phenomena.