Showing papers in "Computer Methods in Applied Mechanics and Engineering in 2017"

TL;DR: In this article, a dual-horizon peridynamics (DH-PD) formulation is presented, which allows for simulations with dual-Horizon with minimal spurious wave reflection and is shown to be less sensitive to the spatial than the original PD formulation.

TL;DR: A new data-driven computational framework is developed to assist in the design and modeling of new material systems and structures and includes the recently developed “self-consistent clustering analysis” method in order to build large databases suitable for machine learning.

TL;DR: In this article, a design methodology based on a combination of isogeometric analysis (IGA), level set and point wise density mapping techniques is presented for topology optimization of piezoelectric/flexolectric materials.

TL;DR: In this article, two solution approaches established based on the Moving Morphable Components (MMC) and moving Morphable Voids (MMV) frameworks, respectively, are proposed and some theoretical issues associated with AM oriented topology optimization are also analyzed.

TL;DR: In this article, an isogeometric thin shell formulation for multi-patches based on rational splines over hierarchical T-meshes (RHT-splines) is presented.

TL;DR: In this article, a particle shifting technique is used to improve the δ + -SPH model and a special treatment has been developed for particles that are close to the free surface region.

TL;DR: In this article, the temperature-dependent material properties of piece-wise functionally graded graphene-reinforced composites (FG-GRCs) are assumed to be graded in the thickness direction of a plate, and are estimated through a micromechanical model.

TL;DR: In this paper, the impact of Lorentz forces on CuO-water nanofluid flow in a permeable enclosure is presented by means of CVFEM, where Darcy's law is applied for porous media.

TL;DR: The NURBS-based isogeometric analysis is integrated to exactly describe the geometry and approximately calculate the unknown fields with higher-order derivative and continuity requirements and is successfully applied to study the static bending, free vibration and buckling responses of rectangular and circular functionally graded microplates.

TL;DR: In this article, the authors address the simultaneous characteristics of thermal radiation and melting heat transfer effects in stagnation point flow of carbon nanotubes due to a stretching cylinder and compute numerical solutions numerically by fifth order Range-Kutta Fehlberg scheme.

TL;DR: This article addresses the numerical modeling of many aspects of heart function, including the interaction of the cardiac electrophysiology system with contractile muscle tissue, the sub-cellular activation–contraction mechanisms, as well as the hemodynamics inside the heart chambers.

TL;DR: In this article, the influence of external magnetic source on Fe3O4-water heat transfer in a cavity with circular hot cylinder is studied and a new numerical method is chosen namely CVFEM.

TL;DR: In this article, the velocity distribution for local Weissenberg number in case of shear thinning liquid reduces whereas it increments for shear thickening liquid and the results demonstrated that the results of presented analysis are compared with the available works in particular situations and reasonable agreement is noted.

TL;DR: In this article, a novel formulation combining the phase field approach for modeling brittle fracture in the bulk and a cohesive zone model for pre-existing adhesive interfaces is proposed to investigate the competition between crack penetration and deflection at an interface.

TL;DR: In this article, two isogeometric topology optimization (ITO) schemes that use asymptotic homogenization (AH) for the calculation of the mechanical properties are proposed for lattice materials with uniform and graded relative density respectively.

TL;DR: In this article, the authors presented a novel numerical method to simulate crack growth in 3D, directly from the Computer-Aided Design (CAD) geometry of the component, without any mesh generation.

TL;DR: A Data Driven Computing paradigm is formulated that generalizes distance-minimizing Data DriVEN Computing and is robust with respect to outliers and assigns data points a variable relevance depending on distance to the solution and on maximum-entropy estimation.

TL;DR: A new method of numericalquadrature for the FEM stiffness matrices is developed by using the proposed method, where a kind of optimized quadrature rule superior in accuracy to the standard Gauss–Legendre quadratures is obtained on the element-by-element basis.

TL;DR: In this paper, an efficient and explicit topology optimization approach based on the Moving Morphable Voids (MMVs) solution framework is proposed to reduce not only the number of design variables but also the degree of freedom in FEA.

TL;DR: This paper develops a first order and a second order time stepping scheme for this highly nonlinear and stiff parabolic PDE system based on the “Invariant Energy Quadratization” approach that can be efficiently solved and rigorously proved to be unconditionally energy stable.

TL;DR: In this article, a modified phase-field model is proposed for simulating mixed mode crack propagation, which can distinguish between the critical energy release rates for mode I and mode II cracks.

TL;DR: In this paper, a generalized formulation of three-variable plate theory and an efficient computational approach for analyzing plates were presented, which not only has three degree of freedoms (DOFs) per node, which complies with three dimensional space of full plate model as classical plate theory (CPT) but also accounts for the effect of shear deformation without any requirement of Shear correction factors (SCF).

TL;DR: In this paper, the vibration behavior of 2D-FG nano and microbeams is analyzed based on the Timoshenko beam theory, and the effects of FG power indexes along length and thickness are studied along each other.

TL;DR: In this article, a method for generating simultaneously optimized shell and infill in the context of minimum compliance topology optimization is presented. But this method is not suitable for additive manufacturing.

TL;DR: A novel multiscale concurrent design method to provide insight into the optimal structural design based on micro-architectures, where both the spatially-varying microstructural configurations and their macroscopic distribution are optimized in an integrated manner is proposed.

TL;DR: In this article, a general virtual element method (VEM) framework for finite elasticity is presented, which emphasizes two issues: element-level volume change (volume average of the determinant of the deformation gradient) and stabilization.

TL;DR: In this article, the magnetohydrodynamic (MHD) boundary layer flow of viscous nanofluid in the presence of velocity slip condition is explored. And the problem formulation is carried out for low magnetic Reynolds number and boundary layer assumptions.

TL;DR: In this article, a general non-linear computational formulation for rotation-free thin shells based on isogeometric finite elements is presented, which allows for a wide range of constitutive laws, including both shell models extracted from existing 3D continua using numerical integration and those that are directly formulated in 2D manifold form, like the Koiter, Canham and Helfrich models.

TL;DR: A novel, linear, second order semi-discrete scheme in time to solve the governing system of equations in the hydrodynamic Q -tensor model, developed following the novel ‘ energy quadratization ’ strategy so that it is linear and unconditionally energy stable at the semi- Discrete level.

TL;DR: The presentation has been structured to show compatibility with T-splines – a state-of-the-art CAD technology – but the approach should extend to other locally refinable spline technologies (based on local tensor-product structures).