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Showing papers in "International Journal of Impact Engineering in 1989"


Journal ArticleDOI
TL;DR: In this paper, the theoretical predictions and experimental results on the deformation of thin plates subjected to impulsive loading were reviewed. But the experimental results were not discussed. And the experimental correlations between the deflection-thickness ratio and a function of impulse, plate geometry, plate dimensions and material properties were discussed.

274 citations


Journal ArticleDOI
TL;DR: In this article, the theoretical predictions and experimental work on the deformation of thin plates subjected to impulsive loading are reviewed. But the experimental results are not discussed. And the experimental correlations between the deflection-thickness ratio and a function of impulse, plate geometry, plate dimensions and material properties are discussed.

233 citations


Journal ArticleDOI
TL;DR: In this paper, a spectrum analyzer was used to measure the beam accelerations within 40 μs time intervals, and the accelerations were integrated so that the response was in suitable velocity form for use in the inverse algorithm.

84 citations


Journal ArticleDOI
TL;DR: Based on a rigid-viscoplastic constitutive relation and a four-hinge model, the authors analyzed the large deformation process of a typical "velocity sensitive" energy absorbing structure proposed by Calladine and English.

65 citations


Journal ArticleDOI
TL;DR: In this paper, a theoretical model for predicting the mean loads in the plastic postbuckling range is developed on the basis of an inextensional folding mechanism and the notion of stationary and travelling plastic hinges.

58 citations


Journal ArticleDOI
TL;DR: In this article, a numerical model for the formation of adiabatic shear bands in thin-walled tubular torsion specimens was developed by considering void nucleation and growth together with thermo-plastic deformation.

36 citations


Journal ArticleDOI
TL;DR: In this article, a new analytical procedure is developed to predict the dynamic response of axially restrained beams to intense pulse loads, where the beams are assumed to have doubly symmetric cross-sections and to obey a rigid-plastic material law.

25 citations


Journal ArticleDOI
TL;DR: In this article, the authors report results of benchmark calculations of hypervelocity impacts of a lead sphere on a lead plate where significant vaporization occurs, and the results are sensitive to the spatial resolution of the numerical solution.

18 citations


Journal ArticleDOI
Claude Fressengeas1
TL;DR: In this article, the formation and distribution of adiabatic shear bands at very high strain rates was investigated through an elastic-viscoplastic model with thermal coupling, accounting for inertia effects and heat conduction.

16 citations


Journal ArticleDOI
TL;DR: In this article, a comparison between the modified Tate theory and a series of penetration experiments is given, and the results tend to confirm the validity of the mathematical model for realistic values of the penetrator and target strengths.

15 citations



Journal ArticleDOI
TL;DR: In this article, the axisymmetric free vibration and dynamic response of polar orthotropic clamped hemispherical shells subjected to suddenly applied loads, including idealized step pressure, a rectangular pressure impulse of finite duration and realistic blast pressure over the total or partial area were studied.

Journal ArticleDOI
TL;DR: In this paper, the effect of work hardening, strain-rate hardening and thermal softening on the deformation of a semi-infinite rod hitting a rigid hemispherical cavity is investigated.

Journal ArticleDOI
TL;DR: In this article, simple two-dimensional simulations are made of the whole body motion of motorcycles involved in glancing impacts with a flat, rigid barrier, and the behavior of the simulations is compared with results from full-scale crash tests.

Journal ArticleDOI
TL;DR: In this paper, the dynamic response of a simply supported circular plate made of a rigid-perfectly plastic material is investigated when taking account of transverse shear, bending moments and rotatory inertia.

Journal ArticleDOI
TL;DR: In this paper, a two-dimensional analytical solution has been developed for examining the initial stage of high velocity impact of deformable cylindrical rods on target plates, and the assumptions inherent in each approach are carefully scrutinized to explain differences between the two solutions.

Journal ArticleDOI
TL;DR: In this paper, the deformation of the target sphere and the propagation of the debris cloud can be analyzed by applying the spherical shock wave theory, and the forward momentum of the projectile does not have a significant effect on the geometry of debris cloud.

Journal ArticleDOI
TL;DR: In this article, an in-depth investigation of low velocity impact response of various beams is performed to study the relationships between impact velocity, beam and projectile material and geometric properties. But, it is found that impactor curvature has little effect on central beam displacement and total contact force histories but strongly influences the contact pressure distribution and contact area size.

Journal ArticleDOI
TL;DR: In this article, a combined experimental and numerical study was performed on the dynamic response behavior of cubical specimens of a tungsten alloy and the locations of the first and second (incipient) spall planes were determined as a function of the height of an explosive charge acting on one of the faces of the specimen.

Journal ArticleDOI
TL;DR: In this paper, a nonlinear dissipative spring mass (NDSM) model for a percussive drill rod joint of the coupling sleeve (CS) type is established.

Journal ArticleDOI
Wendy Johnson1
TL;DR: In this paper, the authors describe Admiral Dahlgren's general career, the books he wrote, the technical problems he attacked and the problematic ordnance discussions of his day, to which he gave his life.

Journal ArticleDOI
TL;DR: In this article, a simple analytical method has been developed to estimate the response of cylindrical storage tanks to axusymmetric external blast loads, which has been verified using physical tests on 1/150th scale models of the prototype tanks.

Journal ArticleDOI
Wendy Johnson1
TL;DR: In this paper, an account is given of one of Benjamin Robins' Tracts concerning an early, elementary consideration of the scaling of gun pieces, and the notion of boring out of certain sizes of cannon to project heavier and therefore more effective shot.

Journal ArticleDOI
TL;DR: In this article, a theoretical solution for the reflection and transmission of flexural waves at a discontinuity of cross section is presented, based on the Timoshenko beam theory, which takes into account the effects of shear deformation and rotary inertia.

Journal ArticleDOI
TL;DR: In this article, an attempt has been made to explain the form and the location of the spalls in terms of stress wave optics considering first and second reflections of the incident waves at the spherical boundary and the energy distribution of incident waves when reflected from this boundary.

Journal ArticleDOI
James F. Wilson1
TL;DR: In this article, a dynamic system consisting of two uniform, vertical beams, one above the other, with a hinge between them and an achor hinge at the base is considered, and it is shown that the critical or peak moment in the lower beam of length l occurs at a distance yc = l/√3 from its base.

Journal ArticleDOI
TL;DR: In this article, the authors present analytical formulae for calculating the stress acting on the contact surface between a projectile and its target, and for calculating velocity of this contact surface under impact, which can be considered as a generalization of the Hopkins-Kolsky theory in the plastic domain.

Journal ArticleDOI
TL;DR: In this paper, the dynamic stress intensity factor (SIF) for propagating cracks under constant velocity is evaluated by adapting a four-term expansion of the complex potential instead of the singular-term one.