Showing papers in "International Journal of Engineering Science in 1978"

TL;DR: In this article, a survey of the terminal ballistics aspects and the penetration mechanics viewpoint of the interaction of penetrators and targets is presented, with a focus on the impact of the penetration on the target.

TL;DR: In this article, various deformation mechanisms that occur when a projectile strikes a target at normal incidence are analyzed with the aid of a computer simulation program, and an objective of the analysis is to identify the important material parameters in targets and projectiles that influence perforation.

TL;DR: In this article, a review of available analytical methods for the study of kinetic energy (inert) projectile-armor interactions at ordnance velocities (0.5 - 2 km/s) is presented.

TL;DR: In this paper, the authors extended the entropy production inequality for classical thermoelastic solids to encompass the more general case of micropolar solids, and showed that the energy equation becomes hyperbolic in form, exhibiting wave properties for thermal disturbances.

TL;DR: In this paper, an analysis of the fluid dynamic characteristics of axisymmetric stagnation flow on a moving circular cylinder is presented, where the governing boundary layer equations have been solved numerically.

TL;DR: In this paper, an analysis of the unsteady response behavior of an axisymmetric stagnation flow on a circular cylinder due to transient free stream velocity is presented, where the governing boundary layer equations are integrated by the steepest descent method.

TL;DR: In this article, a wave propagation model was used to analyze the deformation behavior of a ductile cylinder impacting a rigid surface end-on, and the model was applied to produce simple well behaved models of penetrator and plate deformation due to ballistic impact.

TL;DR: A general minimum principle for linear initial and mixed boundary-value problems is presented in abstract operator notation in this paper, which is valid for elliptic, hyperbolic and parabolic operator equations.

TL;DR: In this article, a variety of computational techniques have been employed to investigate the impact characteristics associated with the penetration process including cratering in thick targets and the perforation of thin targets.

TL;DR: An exact solution of the steady 3-dimensional Navier-Stokes equations and the energy equation is derived for the case of flow due to non-coaxilly rotations of a porous disc and a fluid at infinity in the presence of a uniform transverse magnetic field.

TL;DR: In this paper, the frictionless contact problem for an infinite elastic layer lying on a horizontal rigid plane is considered, where the external load is applied to the layer through a rigid stamp.

TL;DR: In this article, the problem of determining the stress and displacement fields in an orthotropic elastic strip containing a Griffith crack situated symmetrically and oriented in a direction normal to the edges of the strip is considered.

TL;DR: In this article, necessary and sufficient conditions for both the stability of a given regime, and for unstable crack growth were developed for the case when the crack extension involves Modes I, II, and III, and the fracture criterion was defined by a critical value for the total energy release rate.

TL;DR: The penetration of rod projectiles is a function of impact yaw as discussed by the authors, and penetration depends on the parameters D and D sin θ (where D is rod diameter and θ is yaw angle).

TL;DR: In this paper, a domain of influence theorem for a homogeneous isotropic linear thermo-elastic solid was proved based on an analogue of the generalized energy identity established by Zaremba for the classical wave equation.

TL;DR: In this paper, two variational models of the primitive equations governing two-dimensional, viscous incompressible Stokes flows are studied and the existence and uniqueness of solutions to the associated variational problems are proved using the generalized Lax-Milgram theorem of Babuska.

TL;DR: In this article, the penny-shaped crack at the interface between two bonded dissimilar media is reconsidered on the basis of recent developments on the elimination of oscillatory singularities.

TL;DR: In this article, a simple hydrodynamic model is used to estimate the strain field around the cavity created by a rod penetrating a thick plate and to find the distortion of the rear surface of the plate.

TL;DR: In this paper, a solution of the axisymmetric Boussinesq problem for an initially stressed neo-Hookean half-space is obtained in the closed form, from which simple formulae for the depth of penetration of the tip of a rigid punch of arbitrary profile and the total load which must be applied to the punch to achieve this penetration are derived.

TL;DR: In the investigation of earth penetration by projectiles, new experimental techniques, refined constitutive models, and multidimensional wavecodes are providing insights into the complex mechanisms which control the penetration process as discussed by the authors.

TL;DR: In this paper, the authors give a characterization of isotropic hyperelastic materials: there exists a potential of the logarithm of the Almansi-Euler strain tensor, the derivative of which provides us with the Cauchy tensor.

TL;DR: In this paper, the authors define the notion of succion force which represents in an continuous mediums the influence of the medium itself on each of its molecules, and the vectorial sum of these forces in a given volume is calculated with the help of an integral stretched to the surface which limits this volume.

TL;DR: In this article, the propagation of 1-dimensional acceleration waves in a particular granular solid was studied and experimental data on the average wave speed and the wave amplitude were reported for two different initial amplitudes.

TL;DR: In this article, the response of long rods during penetration is examined by strain measurements performed with foil resistance gages, which are connected to thin metal contacts located on the front surface of the plastic sabot.

TL;DR: In this article, the authors separated solutions of Laplace's equation in ellipsoidal coordinates, having the form of products of Lame functions of the first and second kinds, are used to treat some problems for elliptical cracks and punches.

TL;DR: In this paper, the fundamentals of a rational phenomenological theory of ferromagnetic fluids (colloidal suspensions of fine magnetic particles) referred to as ferroliquids for they exhibit elastic properties via the introduction of density gradients are considered.

TL;DR: An extension of the theory of nonlinear and linear thermo-viscoelastic two-composite materials is proposed by using the fundamental concepts of continuum mechanics and rational thermodynamics.

TL;DR: In this article, Noether's theorem is used in an appropriate generalized form to deduce cnnservation laws of the J- integral type in the linear elastostatics of micropolar continua.

TL;DR: In this article, the axially symmetric torsion of a hollow cylinder with an external crack is reduced to a pair of dual series equations, which are shown to be equivalent to an infinite system of simultaneous equations.