Showing papers in "International Journal of Impact Engineering in 1996"

TL;DR: In this paper, a review of recent research into the penetration and perforation of plates and cylinders by free-flying projectiles travelling at sub-ordnance velocities is presented.

TL;DR: In this article, an experimental investigation was carried out to study the behavior of square thin-walled aluminium extrusions in alloy AA6060 subjected to axial loading, and both static and dynamic tests were performed and the primary variables were the wall thickness and temper of the square tubes and the impact velocity of the projectile.

TL;DR: In this paper, the authors conducted depth of penetration experiments into grout and concrete targets with ogive-nose steel projectiles, and determined experimentally the striking velocities corresponding to maximum penetration depths.

TL;DR: In this paper, the authors used the Von Karman equation to estimate the area under load-deflection curve (AUC) of an impact on a Fibre Metal Laminates (FML) sample.

TL;DR: In this article, the results for clamped mild steel square plates subjected to impulsive loads are reported, and three phases of failure modes are identified: partial tearing, complete tearing, and complete tearing with increasing mid-point deformation.

TL;DR: In this paper, extensive experimental results for the prediction of the onset of thinning (necking) and hence subsequent tearing at the boundary of clamped circular plates subjected to uniformly loaded air blasts are presented.

TL;DR: In this article, the impact of a cylindrical hard steel projectile, weighing 120 g, with a conical nose and a 1.5 aspect ration, on regular strength concrete and high strength concrete (HSC) plates, with the following reinforcement: 5 mm steel mesh, steel fibers, small diameter steel wire mesh, and woven steel fence mesh of various diameters.

TL;DR: In this article, a structural constitutive model was used to model the highly nonlinear behavior of the laminate in the penetration process, and a special two-noded ring element based on the Mindlin thick plate theory was employed to model damage processes during static and dynamic penetration.

TL;DR: In this paper, perforation experiments were conducted with 26.3 mm thick, 6061-T651 aluminum plates and 12.9 mm diameter, 88.9mm long, 4340 R c = 44 ogive-nose steel rods.

TL;DR: In this paper, the inverse problem of solving for the impact force history using experimentally measured structural responses tends to be ill-conditioned, and a frequency domain deconvolution method is used to help clarify some of the fundamental difficulties and issues involved in this problem.

TL;DR: In this article, the response of thin clamped plates to a localised impulsive load imparted over a central circular region is investigated experimentally and theoretically to determine the location of tearing failure and the critical impulse to failure.

TL;DR: In this article, an advanced constitutive model is used to describe the shock and high strain rate behaviors of silicon carbide, boron carbide and titanium diboride under impact loading conditions.

TL;DR: In this article, a series of 26 terminal ballistics experiments was performed to measure the penetration of simple confined aluminum nitride targets by a long tungsten rod, which was performed in the reverse ballistic mode using a two-stage light-gas gun.

TL;DR: In this paper, the authors examined changes to the flexural properties of a monolithic glass reinforced polymer (GRP) laminate when impulsively loaded by an underwater shock wave produced by an explosion.

TL;DR: In this paper, a super finite element method was used to predict the transient response of laminated composite plates and cylindrical shells subjected to non-penetrating impact by projectiles, which is based on the classical theories of thin laminated plates and shells taking into account the von Karman kinematics assumptions for moderately large deflections.

TL;DR: In this article, the L D effect for large aspect ratio rods is investigated and a large quantity of experimental data that permits the quantification of the LD effect for projectiles with aspect ratios of 10 − L/D ⩽ 30 is provided.

TL;DR: In this article, a discrete model for dynamic elastic-plastic buckling, which retains the axial and the lateral inertia forces, is proposed, and the relationship between the model parameters and the characteristics of an actual structure is given.

TL;DR: In this paper, the effects of artificial viscosity for Smooth Particle Hydrodynamics (SPH) computations are considered and results are presented for five different problems that each uses six different varieties of Artificial Viscosity.

TL;DR: In this article, the authors investigated the energy and momentum changes of a projectile during the perforation of monolithic and composite targets, and they adopted three approaches: an analytical approach, based on first principles, an analytical development of established penetration prediction equations and an experimental investigation.

TL;DR: In this paper, full width through-thickness cracks were introduced into the ceramic tiles of ceramic faced composite armour panels and the effect of the cracks was to lower the V 50 ballistic limit velocity to 744 m s −1 compared to 764 m s−1 for undamaged panels, a drop of only 3%.

TL;DR: A short review of investigations on the counterintuitive behavior of impulsively loaded structural elements is given in this paper, where the experimental data are discussed with the help of different theoretical results and models of the aerodynamics and structural dynamics.

TL;DR: In this article, a method to determine the location of an impact force using dynamic response measurements is described, which combines frequency-domain problem solving methods using the spectral element method with a stochastic iterative search technique based on a genetic algorithm.

TL;DR: Ballistic impact experiments were performed on ceramic laminate targets at three scale sizes, nominally 1 3, 1 6, and 1 12, to quantify the effects of scale on various responses, in particular, the ballistic limit velocity.

TL;DR: In this paper, the authors compare two-dimensional plane strain calculations of ricochet with fully three-dimensional simulations performed with Apollo, a threedimensional Lagrangian finite element code for impact and explosive loading problems.

TL;DR: In this article, the authors tested the validity of replica scaling, by which they mean that all geometrical dimensions are scaled uniformly, while the materials and the impact velocity are kept the same.

TL;DR: In this article, a broad range of strain rates using tensile specimens made of E Glass/Epoxy (±45) s crossply laminate were investigated under the damage mechanics frame, permitting access to the influence of the strain rate on damage threshold and damage propagation rate.

TL;DR: In this article, a beam-on-foundation analogy is used to analyse perforation of thin tubes hit at normal obliquity by flat-nosed missiles, and the analytical model was used to predict local failure due to plugging and consequently the ballistic limit of a tube composed of rate independent rigid-plastic material.

TL;DR: In this paper, both experimental and theoretical results are presented concerning the dynamic elastic-plastic behaviour of cantilever pipes subjected to a transverse force pulse at the free end.

TL;DR: In this article, the dynamic response of cylindrical shells under pressure impact is investigated using a finite element approach using a membrane theory development, which accounts for finite changes of geometry.

TL;DR: In this paper, the elastic response of glass/epoxy laminated composite ogival shells subjected to low velocity impact at an arbitrary location by a solid striker is examined. And the authors present an analytic solution for prediction of transient displacement and induced stress and strain, which considers both contact and transverse shear deformation.