Showing papers in "International Journal of Impact Engineering in 2005"

TL;DR: In this paper, a collection of empirical formulae to predict the penetration depth, scabbing thickness and perforation thickness is presented in both Imperial and SI units and the current status of various design codes is summarized based on a dimensional analysis, dominant non-dimensional parameters that may influence the local impact effects on concrete targets are obtained and then used to present some of the test data Various nose shape factors are compared and a unique definition of the nose shape factor is suggested Analytical models and numerical simulation methods for penetration are summarized Criticisms are made for the current understanding of

TL;DR: In this paper, room temperature and elevated temperature experiments were conducted on a tensile split Hopkinson bar apparatus to identify the constitutive response and damage evolution in AA5754 and AA5182 aluminum alloy sheet at high strain rates.

TL;DR: In this article, the authors present the results of an experimental study on the impact resistance of concrete with compressive strength of 45-235 MPa when subjected to impact by a 12.6mm ogive-nosed projectile at velocities ranging from ∼620 to 700 m/s.

TL;DR: In this article, the effect of the cell shape and the foil thickness on crush behavior was investigated by the numerical simulation using an explicit FEM code DYNA3D, and the numerical result showed that the cyclic buckling mode takes place in every case and that the crush strength is higher for smaller branch angle.

TL;DR: In this paper, a commercially available finite element analysis code, LS-DYNA, is used to model the ballistic impact of a square patch of single-ply plain-woven fabric.

TL;DR: In this article, a 1D plastic shock wave analysis is performed for a foam projectile impacting a free but rigid mass, and it is shown that the magnitude and duration of the pressure pulse can be controlled by suitable adjustment of the velocity, length and density of the foam projectile.

TL;DR: In this article, a high temperature split Hopkinson pressure bar (SHPB) test system was used to investigate the effects of temperature as well as those of strain and strain-rate.

TL;DR: In this article, the influence of cell irregularity and impact velocity on the deformation mode and the plateau crush pressure of 2D cellular structures was investigated using finite element method using ABAQUS/Explicit code.

TL;DR: Wu et al. as mentioned in this paper investigated the energy dissipation during the normal impact of an elastic spherical particle with a substrate, which is assumed to be elastic or elastic-plastic, using the finite element method (FEM).

TL;DR: In this paper, the results of experimental and numerical work on the response of built-in mild steel quadrangular plates with different stiffener configurations (unstiffened, single, double, cross and double cross), subjected to blast loading are presented.

TL;DR: In this article, the authors reported experimental and numerical simulation of ballistic impact problems on thin composite laminated plates reinforced with Kevlar 29. They used a commercial code based on finite differences and values obtained are compared with the experimental data to evaluate the performance of the simulation.

TL;DR: In this paper, the results of experimental and numerical work on the response of built-in mild steel quadrangular plates with different stiffener configurations (unstiffened (flat), single (S), double (D), cross (C) and double cross (DC)) subjected to blast loading are presented.

TL;DR: In this paper, the degree of stress uniformity in specimens tested dynamically by the split Hopkinson bar (SHB) method is examined and the time duration tb (or number of transits n an elastic wave makes from one end to the other of a specimen) required to attain stress equilibrium is established and related to the relative mechanical impedance β of the specimen.

TL;DR: In this paper, a study has been made of the effect of the adhesive layer thickness on the efficiency of alumina/aluminium armours, where full-scale tests were made shooting an armour piercing projectile against panels thick enough to arrest the projectile and also close to the ballistic limit.

TL;DR: In this paper, a method to evaluate the coefficient of restitution for multiple impacts between material bodies is presented, which is due to the initiation of waves and plastic deformation of the colliding bodies.

TL;DR: In this article, an experimental study has been carried out on the ballistic performance of 95% and 99.5% alumina ceramic tiles backed by metal plates, when subjected to normal impact of hard steel 12.7mm armour piercing (AP) projectiles at velocities ranging from 500 to 830 ms−1.

TL;DR: In this article, the deformation and tearing of thin circular plates subjected to impulsive loads were modeled using finite element code ABAQUS and hydro-dynamic code AUTODYN.

TL;DR: In this paper, an algorithm for the coupling of a smoothed particle hydrodynamics (SPH) solver to a finite element solver is presented, which allows for frictionless sliding between FE and particles and is implemented in 3D.

TL;DR: In this paper, an experimental and numerical study on the perforation of AA6005-T6 aluminum panels impacted by ogival-nosed steel projectiles is presented, where the experimental results are used to calibrate slightly modified versions of the Johnson-Cook constitutive relation and fracture criterion.

TL;DR: In this article, a model for the impact kinematics is deduced from experimental acceleration measurements, supporting probability-based engineering design of rockfall protection systems with gravel as an energy-absorbing component.

TL;DR: In this paper, the results for the responses of ceramic targets, with and without prestress, subjected to a projectile impact are presented, and a computational technique to include prestress is presented.

TL;DR: In this article, a new experimental method for testing the dynamic tensile behavior of concrete at high strain rates was designed and established by using this method, the Dynamic tensile strength of concrete and its dependence on strain rates were measured and investigated.

TL;DR: In this article, three numerical models of hailstone have been developed: finite element, arbitrary Lagrangian Eulerian, and smoothed particle hydrodynamics model, which were validated referring to a documented experimental test and subsequently used to reproduce the impact of a hailstone with the noselip of a nacelle intake.

TL;DR: In this paper, the compressive behavior of polystyrene foam was investigated at strain rates from 0.001 to 950/s with a hydraulically driven test machine and a modified split Hopkinson pressure bar.

TL;DR: In this paper, the numerical results of ballistic impact and perforation of woven aramid fabric are presented, where the yarns are modelled as a network of nodal masses connected by one-dimensional viscoelastic elements.

TL;DR: In this article, the onset of fracture and subsequent propagation of radial cracks of thin clamped circular plates under localized impulsive loading were predicted analytically and numerically for discing and petalling stages with increasing intensity of applied impulse and various radii of loaded area.

TL;DR: In this paper, the impact toughness of different lightweight sandwich panels and composite sheet materials has been investigated in the context of aircraft, marine-craft, road and rail vehicles, and a servo-hydraulic impact machine was also employed.

TL;DR: In this paper, a new concept of rock shed protection is proposed, which is made of reinforced concrete slabs held up by specially designed supports that act as a type of expendable fuse to absorb high rock-fall energy especially when shock occurs on the side of the slab.

TL;DR: In this article, a study was undertaken to characterise the mechanical properties of cancellous bone from the human cervical spine from eight male cadavers (aged 40 − 79 yrs) subjected to quasi-static and dynamic compression.

TL;DR: In this article, the behavior of fully restrained steel connections subjected to blast loads was examined using finite element analysis and the results showed that the TM5-1300 criteria for steel connections are inadequate.