Structural health monitoring of cracked structures is one of beloved subject of researchers recently. Consider of crack behavior in the water and energy pipeline is important because of environmental problems. In this paper consider of crack parameters in the underwater pipe subjected to mechanical transient load is investigated. For this purpose, three- dimensional parametric model of cracked ...

Purpose. To study nature and patterns of main cracks development in a solid medium during an explosion explosive charge cavity with longitudinal symmetrical incision various cross-sectional shapes Methodology. Experimental methods were used to process dynamics, direction the their transformation into clear optical image under influence focused laser beam through system – method caustics. Study ...

We present an efficient algorithm able to predict the trajectories of individual cluster constituents as they penetrate relatively thick amorphous targets. Our algorithm properly treats both the intracluster Coulomb repulsion and the collisions between cluster constituents and target atoms. We have compared our simulation predictions to experimental measurements of the distribution of lateral e...

The Centurion – Halite experiment demonstrated the feasibility of igniting a deuterium – tritium micro-explosion with an energy of not more than a few megajoule, and the Mike test the feasibility of a pure deuterium explosion with an energy of more than 10 6 megajoule. In both cases the ignition energy was supplied by a fission bomb explosive. While an energy of a few megajoule, to be released ...

The disassembly of molecular clusters (N 2) n (n=50-3000) in strong optical fields is investigated using two-dimensional time-of-flight spectrometry. Very highly charged ions are formed with a two-component energy distribution. A low-energy, isotropic component correlates with Coulomb explosion. A high-energy, anisotropic component, that results from a " charge flipping " acceleration mechanism...

Energetic, highly-charged oxygen ions, Oq+ (q ≤ 6), are copiously produced upon laser field-induced disassembly of highly-charged water clusters, (H2O)n and (D2O)n, n ∼ 60, that are formed by seeding high-pressure helium or argon with water vapor. Arn clusters (n∼40000) formed under similar experimental conditions are found undergo disassembly in the Coulomb explosion regime, with the energies ...

The hulls of naval ships are exposed to forces and moments coming from internal external sources. Usually, these interactions that can be described mathematically by harmonic polyharmonic functions. shock UNDEX type (underwater explosion) works completely differently its time waveform is difficult describe with mathematical functions as pressure vs. time. paper presents a simplification physica...