Showing papers in "International Journal of Solids and Structures in 2006"

TL;DR: In this paper, a combined experimental and analytical investigation has been performed to understand the mechanical behavior of two amorphous polymers (polycarbonate and poly(methyl methacrylate) at strain rates ranging from 10−4 to 104−s−1.

TL;DR: In this article, an idealized DEA is modeled and its failure is predicted as a function of film pre-stretch used during actuator fabrication, actuation voltage, and stretch rate.

TL;DR: In this article, a triaxial damage-plastic model for the failure of reinforced concrete columns is presented, where the plasticity part is based on the effective stress and the damage model is driven by the plastic strain.

TL;DR: In this paper, an elastic, rectangular, and simply supported, functionally graded material (FGM) plate of medium thickness subjected to transverse loading has been investigated, and the analytical solutions of P-, S- and E-FGM plates are proved by the numerical results of finite element method.

TL;DR: In this paper, a cooperative model based on a strain rate/temperature superposition principle was proposed for compressive yield stress analysis of polycarbonate, polymethylmethacrylate, and polyamideimide.

TL;DR: In this article, a new plastic-damage constitutive model for concrete is proposed, where a tensile and a shear damage variable are adopted to describe the degradation of the macromechanical properties of concrete.

TL;DR: Lim et al. as discussed by the authors proposed a general thin plate theory including surface effects, which can be used for size-dependent static and dynamic analysis of plate-like thin film structures, and some numerical examples are provided to verify the validities of the theory.

TL;DR: In this article, the uniqueness of solution by applying unified displacement-difference periodic boundary conditions on the repeated unit cell models (RUCs) has been proved and it is deduced that selection of the RUCs for a fixed periodic array may not be unique.

TL;DR: In this paper, a simple method for constructing transversely isotropic polyconvex functions suitable for the description of biological soft tissues is presented, where only a few parameters are necessary to approximate a variety of stress-strain curves and to satisfy the condition of a stress-free reference configuration a priori in the framework of polyconcaveity.

TL;DR: In this article, two different approaches for modeling the behavior of carbon nanotubes are presented, one based on homogenization and the other based on finite element models, where the interatomic interactions due to covalent and non-covalent bonds are replaced by beam and spring elements, respectively, in the structural model.

TL;DR: In this paper, a topology optimization is used to systematically design periodic materials that are optimized for multiple properties and prescribed symmetries, in particular, mechanical stiffness and fluid transport are considered.

TL;DR: In this paper, a numerical method for form-finding of tensegrity structures is presented, where Eigenvalue analysis and spectral decomposition are carried out iteratively to find the feasible set of force densities that satisfies the requirement on rank deficiency of the equilibrium matrix with respect to the nodal coordinates.

TL;DR: In this paper, a new theory for orthotropic plate analysis, which involves only two unknown functions and yet takes into account shear deformations, is presented, which gives rise to only two governing equations, which are completely uncoupled for static analysis, and are only inertially coupled (i.e., no elastic coupling at all) for dynamic analysis.

TL;DR: In this paper, a hierarchy of higher order continua is presented that introduces additional degrees of freedom accounting for volume changes, rotation and straining of an underlying microstructure, which represents a refinement of the material description.

TL;DR: In this article, a dislocation induced back stress formulation is proposed in which the full tensorial nature of the dislocation stress state is included in the continuum description, which intrinsically includes latent kinematic hardening from dislocations lying on all slip systems.

TL;DR: In this paper, the out-of-plane compressive, transverse shear and longitudinal shear responses of corrugated cores have been measured at three relative densities 0:03 < q 6 0:10 and compared with analytical and finite element (FE) predictions.

TL;DR: In this paper, a new method for crack identification of bridge beam structures under a moving load based on wavelet analysis is presented, where cracks are modeled through rotational springs whose compliance is evaluated using linear elastic fracture mechanics.

TL;DR: In this paper, a simple derivation of the tangent stiffness matrix for a prestressed pin-jointed structure is given, and is used to compare the diverse formulations that can be found in the literature for finding the structural response of prestressed structures.

TL;DR: In this paper, an analytical solution for the debonding process in an FRP-to-concrete bonded joint model where the FRP plate is subject to tension at both ends is employed.

TL;DR: In this paper, the dynamic responses of clamped circular monolithic and sandwich plates of equal areal mass have been measured by loading the plates at mid-span with metal foam projectiles.

TL;DR: In this paper, the generalized thermoelastic theory with one relaxation time was used to analyze the micro-beam damping of a single-beam resonator, and the results showed that the amplitude of deflection and thermal moment are attenuated and the vibration frequency is increased with thermo-elastic coupling effect.

TL;DR: In this article, the authors obtain the failure criterion for a representative material volume (RMV) in terms of the macroscopic equivalent strain (Ec) as a function of the stress triaxiality parameter (T) and the Lode angle (θ) by conducting systematic finite element analyses of the void-containing RMV subjected to different macro-scopic stress states.

TL;DR: In this article, the numerical solutions of the simply supported FGM plate with power-law, sigmoid, and exponential FGMs have been derived directly from theoretical formulations and calculated by finite element method using MARC program.

TL;DR: In this paper, an effective Cauchy stress tensor of the form σ ¯ = σ + ( 1 - K / K s ) p ¯ 1 emerges from the formulation, where σ is the total tensor, K and Ks are the bulk moduli of the solid matrix and solid phase, respectively, and p ¯ is the mean pore water and pore air pressures weighted according to the degree of saturation.

TL;DR: In this article, a multi-layered model for frictionless contact analysis of functionally graded materials (FGMs) with arbitrarily varying elastic modulus under plane strain-state deformation has been developed.

TL;DR: In this article, a generalized form for the notch stress intensity factors, in which not only the opening angle but also the tip radius dimension is explicitly involved, is given. But the authors do not consider the case of sharp V-shaped notches.

TL;DR: In this article, the authors investigated the effect of elastic-plastic normally loaded contact between a deformable sphere and a rigid flat on failure inception under perfect slip and full stick conditions for a wide range of the sphere mechanical properties.

TL;DR: In this paper, a steel square honeycomb core sandwich and solid monolithic beams have been subjected to high-pressure, short-duration impulses using a shock simulation technique involving high-speed impact of Al foam projectiles.

TL;DR: In this paper, a theory of nonlocal elasticity of bi-Helmholtz type kernels with Eringen's model was studied, and the nonlocal kernels were derived analytically as Green functions of partial differential equations of fourth order.

TL;DR: In this article, a second strain gradient elasticity theory is proposed based on first and second gradients of the strain tensor, which is an extension of first strain gradients with double stresses.