With the help of the methods developed in [21], we highlight condition (T ) as a source of new examples of ’ballistic’ diffusions in a random environment when d ≥ 2 (’ballistic’ means that a strong law of large numbers with non-vanishing limiting velocity holds). In particular we are able to treat the case of non-constant diffusion coefficients, a feature that causes problems. Further we recove...

Abstract In order to study the anti-penetration performance of ceramic/aramid fiber/PE-UHMW composite armor, based on FEM-SPH coupling algorithm, SPH model is established for brittle ceramic materials simulate formation cone, crack propagation and fragmentation splash process. The failure mode aramid fiber PE-UHMW analyzed. influence different projectile velocities impact points armor are resul...

This study proposes a new theoretical model for high-velocity impact in two kinds of targets, Kevlar/elastomer and Kevlar/epoxy composites, comprehensively discusses compares these. In this analysis, with the aid hyperelasticity theory, energy absorption equations are derived based on linear nonlinear behavior constituents to assess dependence ballistic limit interaction first, second, third, f...

Although many studies have examined performance improvements of ballistic movement through practice, it is still unclear how performance advances while maintaining maximum velocity, and how the accompanying triphasic electromyographic (EMG) activity is modified. The present study focused on the changes in triphasic EMG activity, i.e., the first agonist burst (AG1), the second agonist burst (AG2...

The ballistic perforation resistance of 50 mm thick concrete slabs impacted by 20 diameter ogive-nose steel projectiles is investigated experimentally and numerically. Three commercially produced concretes with nominal unconfined compressive strengths 35, 75 110 MPa were used to cast material test specimens slabs. After curing, impact tests carried out determine the limit curve velocity for eac...

Abstract The reactive projectile presents a tremendous potential to induce the combined damage effect of kinetic energy and chemical plate. A series ballistic impact experiments numerical simulation studies were carried out study penetration behavior against TC4 experimental results showed that with velocity increasing from 537m/s 682m/s, mode plate gradually changes bulge, cross crack plug. Ac...

Ballistic annihilation kinetics for a multi-velocity one-dimensional ideal gas is studied in the framework of an exact analytic approach. For an initial symmetric three-velocity distribution, the problem can be solved exactly and it is shown that different regimes exist depending on the initial fraction of particles at rest. Extension to the case of a n-velocity distribution is discussed. PACS ...

The aim of the study was to determine whether vibration applied directly to a muscle-tendon could enhance neuromuscular output during and 1.5 and 10 min after a bout of ballistic resistance training. Fourteen participants were exposed to two training conditions in random order: exercise with vibration and exercise with sham vibration. The exercise comprised three sets of ballistic knee extensio...

In this paper, molecular dynamics (MD) simulations are employed to study the perforation of graphene under impact by fullerenes various sizes. The buckling characteristics after classified and discussed. relative state C180 projectile at different velocities is also investigated. We observed that rebounds low velocity (V < 4.25 km/s), sticks high (4.25 km/s ≤ V 4.75 perforates higher ≥ km/s). I...