Showing papers in "International Journal of Solids and Structures in 1990"

TL;DR: In this paper, a nonlinear intrinsic formulation for the dynamics of initially curved and twisted beams in a moving frame is presented, which is written in a compact matrix form without any approximations to the geometry of the deformed beam reference line or to the orientation of the intrinsic cross-section frame.

TL;DR: In this paper, a 3D analysis of a semi-infinite crack embedded in a transversely isotropic piezoelectric material was performed by means of the eigenfunction expansions method.

TL;DR: In this paper, the response of a prestressed structural mechanism to any external action is decomposed into two almost separate parts, which correspond to extensional and inextensional modes.

TL;DR: In this paper, the state equation for the jth plies of a laminated thick orthotropic plate is established in the local coordinate system according to the knowledge which has been introduced in the paper by Sundara Raja Iyengar and Pandya (1983, Fiber Sci. Technol.

TL;DR: In this paper, the authors investigated the constitutive behavior of granular assemblies taking into account the effect of particle rotation and displacement, and derived stress-strain relationship by an example of a randomly packed assembly of circular disks loaded in two different conditions.

TL;DR: In this article, the authors analyzed the shape and extent of the zone of decohesion in polyimide films under mixed mode conditions involving modes 1, 2 and 3, and proposed a prototypical criterion for mixed mode interfacial fracture.

TL;DR: In this article, the instability of composite laminated plates under uniaxial, harmonically-varying, in-plane loads is investigated, both symmetric cross-ply and antisymmetric angle-ply laminates are analyzed.

TL;DR: In this paper, the effects of uplift, friction and capillarity for liquid-saturated porous solids are discussed by use of general porous media theories (mixture theories extended by the volume fraction concept).

TL;DR: In this paper, the governing equations for the pressure in a rubber slice of arbitrary cross section are presented and the solution is carried out for the circular shape and compared to experimental results.

TL;DR: The DISDECO project as discussed by the authors is an open-ended, hierarchical, interactive computer code that allows the user to access from his workstation successive programs of increasing complexity, including anisotropic shell structures under combined loading.

TL;DR: In this article, a model for kink band formation in uniaxially compressed fiber composites is proposed, which involves the bowing of a bundle of slightly misaligned fibers (via microbuckling) until fiber fracture, followed by a finite deformation which brings the fibers into the kinked configuration.

TL;DR: In this paper, the authors present experimental and analytical results which show how the initiation and steady state propagation of such bulges in latex rubber tubes is affected by the presence of axial tensile load.

TL;DR: In this article, closed-form solutions for elastica with axial and shear deformations were derived using elliptic integrals, using the Timoshenko beam theory of finite displacements with finite strains.

TL;DR: In this article, a tensor-based finite-rotation model for doubly curved finite shell elements is developed via the displacement formulation, where the non-linearity can be treated by an incremental-iterative technique.

TL;DR: In this paper, the dynamics of a cracked, distributed parameter rotor component is studied, where two uniform fields are connected by a local, complex spring element with reduced stiffness and damping simulating an open crack.

TL;DR: In this paper, the authors studied the failure of composite flat plates in the presence of a stress raiser. Butts et al. showed that the failure is initiated by a localized instability in the 0-deg plies at the hole surface approximately at right angles to the loading direction.

TL;DR: In this article, a debonding-stretching model is proposed to analyse the effects of interfacial debonding on the ductile particle toughening of ceramics, and a continuous model based on the micromechanical analysis of the plastically stretched particles is used to calculate the deformation field in the bridging zone for a Mode I plane strain crack loaded under small scale bridging condition.

TL;DR: The importance of the role of plastic spin in the rate-dependent response of materials at large deformations is discussed in this paper, where an isotropic/kinematic hardening and an orthotropic viscoplastic model are used to analyze the stress-strain response under simple shear and biaxial loading at different rates.

TL;DR: In this paper, an advanced formulation of time-domain Boundary Element Method (BEM) for linear elastodynamics is used to study a number of problems involving wave propagation through half-space as well as multi-layered soils.

TL;DR: In this paper, a method is introduced for determining the critical initial imperfections of discretized structures that decrease the loadbearing capacity most rapidly, based on the Lyapunov-Schmidt decomposition developed in bifurcation theory.

TL;DR: In this paper, a new method for calculating the intrinsic stress that develops in a film as it is deposited onto a substrate is presented, which makes no assumptions regarding the thickness of the film or the uniformity of film stress and also accounts for nonlinear geometric effects which may become significant whenever the measured deflections reach an order of magnitude equal to or greater than that of the substrate thickness.

TL;DR: In this paper, the critical strain at which a fully formed kink band can exist in a compressed fiber composite is calculated based on a comparison of the energies of the kinked and unkinked configurations, assuming both satisfy all relevant field equations.

TL;DR: In this article, a boundary element method is developed for the solution of time-dependent problems in three-dimensional thermoelasticity, which is the first of its kind for quasistatic analysis, which considers transient heat conduction, but ignores the effects of inertia.

TL;DR: In this paper, the buckling of an edge-notched beam for isotropic and anisotropic composites is studied for two different types of hinged supports, namely freely approaching and fixed span, and the effect of reducing rigidity on the load-carrying capacity and the postbuckling behavior of the beam is discussed and exemplary numerical solutions are provided.

TL;DR: In this paper, a numerical solution technique by the boundary element method is developed for the flexural vibration and buckling analysis of elastic orthotropic plates according to Kirchhoff's theory.

TL;DR: In this paper, a brittle fracture mechanics approach is used to model the debonding phenomenon and the analytical solution is derived from it, which is then compared with those obtained by means of a finite element approach, in which the layers' adhesion is modeled with unilateral springs.

TL;DR: By considering three-dimensional elasticity without any initial assumptions, the authors of as mentioned in this paper obtained the state equations for an orthotropic body and presented a series solution for a simply supported rectangular thick plate with arbitrary ratio between thickness and width under any given load.

TL;DR: In this paper, a model was developed for simulating the manufacturing process of filament-wound cylinders made of a thermoset matrix composite, which is applicable to cylinders for which the diameter is large compared to the wall thickness.

TL;DR: In this paper, the antiplane strain problem for bonded dissimilar half planes of general anisotropic material containing an inclined crack terminating at the bimaterial interface is considered, and the dependence of the order of the stress singularity on the inclined angle and material constants is studied.

TL;DR: In this article, a finite element formulation for finite deformation analysis of a straight elastic in-plane beam is presented, based on a modified Hu-Washizu variational principle in which exact nonlinear kinematic equations are taken into account.