ARTMe: a new array-based algorithm for Adaptive Refinement of Triangle Meshes
This work presents a new efficient array-based algorithm for adaptive mesh refinement capable of interactively generating millions of triangles. The new refinement algorithm satisfies important topological mesh properties, e.g., vertex valence control ...
Maximizing the first eigenfrequency of structures subjected to uniform boundary erosion through the level set method
Erosion of structure may result in non-trivial loss of performance. For instance, erosion may make structure members break apart and results in localized vibration eigenmodes, which will make the first eigenfrequency of eroded structure become smaller. ...
Designing a fuzzy cognitive map to evaluate drilling and blasting problems of the tunneling projects in Iran
The study of drilling and blasting processes in excavation projects, especially in Iran, demonstrates various challenges and problems that eventually affect the technical and economic aspects of project performance. This paper introduces a methodology ...
Proposing a novel hybrid intelligent model for the simulation of particle size distribution resulting from blasting
In the open-pit mines and civil projects, drilling and blasting is the most common method for rock fragmentation aims. This article proposes a new hybrid forecasting model based on firefly algorithm, as an algorithm optimizer, combined with the adaptive ...
Automatic evaluation of plastic collapse conditions for planar frames with vertical irregularities
The plastic load and failure modes of vertically irregular planar frames are studied by means of an original software code developed in the agent-based programming environment NetLogo with a user-friendly interface. The proposed method lies in the limit ...
A haar wavelet approximation for two-dimensional time fractional reaction---subdiffusion equation
In this study, we established a wavelet method, based on Haar wavelets and finite difference scheme for two-dimensional time fractional reaction---subdiffusion equation. First by a finite difference approach, time fractional derivative which is defined ...
Numerical solution of a time-fractional PDE in the electroanalytical chemistry by a local meshless method
In the current manuscript, we consider a fractional partial integro-differential equation that has some applications in the electroanalytical chemistry. The fractional derivative is based on the Riemann---Liouville fractional integral. The current ...
Solving viscoelastic problems with cyclic symmetry via a temporally adaptive EFG-SB partitioning algorithm
Based upon a combination of a temporally-piecewise adaptive algorithm with an Element-Free Galerkin Scaled Boundary Method (EFG-SBM), a partitioning algorithm is presented for the two-dimensional viscoelastic analysis of cyclically symmetric structures. ...
Crash analysis of lithium-ion batteries using finite element based neural search analytical models
The electric operated road vehicles are frequently powered by lithium ion batteries due to its low cost and ease of manufacturing. However, unforeseen impacts in road conditions can lead to fire hazard due to short circuiting of the battery pack. The ...
A new fast convergent iteration regularization method
Dynamic loads widely exist in numerous applications of mechanical engineering structures, and their identification signifies an important issue for studying mechanical consequence of engineering structures and characterizing their dynamic ...
Metamodelling of wheel---rail normal contact in railway crossings with elasto-plastic material behaviour
A metamodel considering material plasticity is presented for computationally efficient prediction of wheel---rail normal contact in railway switches and crossings (S&C). The metamodel is inspired by the contact theory of Hertz, and for a given material, ...
Gradient-enhanced kriging for high-dimensional problems
Surrogate models provide an affordable alternative to the evaluation of expensive deterministic functions. However, the construction of accurate surrogate models with many independent variables is currently prohibitive because they require a large ...
Application of dual-Chebyshev wavelets for the numerical solution of boundary integral equations with logarithmic singular kernels
In this paper, the discrete Galerkin method based on dual-Chebyshev wavelets has been presented to approximate the solution of boundary integral equations of the second kind with logarithmic singular kernels. These types of integral equations occur as a ...
Evaluating unconfined compressive strength of cohesive soils stabilized with geopolymer: a computational intelligence approach
Soil stabilization using geopolymers is a new technique for improvement of weak cohesive soils. Evaluating behavior of improved soils requires an initial estimation of strength parameters. In this study, extensive experimental results on geopolymer-...
Adaptive analysis of plates and laminates using natural neighbor Galerkin meshless method
In this paper, natural neighbor Galerkin meshless method is employed for adaptive analysis of plates and laminates. The displacement field and strain field of plate are based on Reissner---Mindlin plate theory. The interpolation functions employed here ...
Non-classical plate model for FGMs
In this work, we developed a non-classical plate model for the analysis of the behavior of microplates prepared from functionally graded materials (FGMs). It was assumed that the material properties of FGM microplates vary along the direction of ...
Semi-analytical solution for time-fractional diffusion equation based on finite difference method of lines (MOL)
In this article, we apply the method of lines (MOL) for solving the time-fractional diffusion equations (TFDEs). The use of MOL yields a system of fractional differential equations with the initial value. The solution of this system could be obtained in ...
Three hybrid intelligent models in estimating flyrock distance resulting from blasting
Flyrock is an adverse effect produced by blasting in open-pit mines and tunnelling projects. So, it seems that the precise estimation of flyrock is essential in minimizing environmental effects induced by blasting. In this study, an attempt has been ...
Geometry simplification of open-cell porous materials for elastic deformation FEA
- Camilo Cortés,
- Maria Osorno,
- David Uribe,
- Holger Steeb,
- Oscar Ruiz-Salguero,
- Iñigo Barandiarán,
- Julián Flórez
Estimation of mechanical properties of porous materials is central for their medical and industrial application. However, the massive size of accurate boundary representations (B-Rep) of the foams makes the numerical estimations intractable. Even for ...
Parts internal structure definition using non-uniform patterned lattice optimization for mass reduction in additive manufacturing
Today, being able to generate and produce shapes that fit mechanical and functional requirements and having as low as possible mass is crucial for aerospace and automotive applications. Besides, the rise of new additive manufacturing technologies has ...
Application of meshless SWE model to moving wet/dry front problems
In this study, the 2D shallow water equations (SWE) are solved using a meshless method with the local polynomial approximation and the weighted-least-squares (WLS) approach. Three challenging dam-break flow problems are chosen to test the 2D meshless ...
The effect of ICA and PSO on ANN results in approximating elasticity modulus of rock material
Reliable determination/evaluation of the rock deformation can be useful prior any structural design application. Young's modulus (E) affords great insight into the characteristics of the rock. However, its direct determination in the laboratory is ...
Development of a novel soft-computing framework for the simulation aims: a case study
The simulation of blast-induced air-overpressure (AOp) has been a major area of interest in the recent years, and many models have been employed in this field. The scope of this paper is to propose a novel soft-computing framework for predicting the AOp ...
Automated low-order to high-order mesh conversion
An algorithm is presented for the CAD-free conversion of linear unstructured meshes into curved high-order meshes, which are necessary for high-order flow simulations. The algorithm operates via three steps: (1) autonomous detection of feature curves ...
Unsaturated soil slope characterization with Karhunen---Loève and polynomial chaos via Bayesian approach
Field measured data reflect real response of soil slopes under rainfall infiltration and can provide representative estimates of in situ soil properties. In this study, an efficient probabilistic back analysis method for characterization of spatial ...