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 Archives of Computational Methods in Engineering   [SJR: 2.841]   [H-I: 40]   [5 followers]  Follow         Hybrid journal (It can contain Open Access articles)    ISSN (Print) 1886-1784 - ISSN (Online) 1134-3060    Published by Springer-Verlag  [2350 journals]
• FEMPAR : An Object-Oriented Parallel Finite Element Framework
• Authors: Santiago Badia; Alberto F. Martín; Javier Principe
Pages: 195 - 271
Abstract: FEMPAR is an open source object oriented Fortran200X scientific software library for the high-performance scalable simulation of complex multiphysics problems governed by partial differential equations at large scales, by exploiting state-of-the-art supercomputing resources. It is a highly modularized, flexible, and extensible library, that provides a set of modules that can be combined to carry out the different steps of the simulation pipeline. FEMPAR includes a rich set of algorithms for the discretization step, namely (arbitrary-order) grad, div, and curl-conforming finite element methods, discontinuous Galerkin methods, B-splines, and unfitted finite element techniques on cut cells, combined with h-adaptivity. The linear solver module relies on state-of-the-art bulk-asynchronous implementations of multilevel domain decomposition solvers for the different discretization alternatives and block-preconditioning techniques for multiphysics problems. FEMPAR is a framework that provides users with out-of-the-box state-of-the-art discretization techniques and highly scalable solvers for the simulation of complex applications, hiding the dramatic complexity of the underlying algorithms. But it is also a framework for researchers that want to experience with new algorithms and solvers, by providing a highly extensible framework. In this work, the first one in a series of articles about FEMPAR, we provide a detailed introduction to the software abstractions used in the discretization module and the related geometrical module. We also provide some ingredients about the assembly of linear systems arising from finite element discretizations, but the software design of complex scalable multilevel solvers is postponed to a subsequent work.
PubDate: 2018-04-01
DOI: 10.1007/s11831-017-9244-1
Issue No: Vol. 25, No. 2 (2018)

• Applications of BIM: A Brief Review and Future Outline
• Authors: Zahra Pezeshki; Syed Ali Soleimani Ivari
Pages: 273 - 312
Abstract: This paper surveys building information modeling (BIM) development using classification and literature review of articles for the last decade (2000–2016) to explore how various BIM methodologies have been developed during this period. Based on the selected journals of different BIM applications and different online database of BIM, this article surveys and classifies BIM applications into ten different categories such as education system, medical system, economic system, electrical and electronics system, traffic control, image processing and feature extraction, manufacturing and system modeling, forecasting and predictions, BIM enhancements and social sciences. For each of these categories, this paper mentions a brief future outline. This review study indicates mainly three types of future development directions for BIM methodologies, domains and article types: (1) BIM methodologies are tending to be developed toward expertise orientation. (2) It is suggested that different social science methodologies could be implemented using BIM as another kind of expert methodology. (3) The ability to continually change and learning capability is the driving power of BIM methodologies and will be the key for future intelligent applications.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9204-1
Issue No: Vol. 25, No. 2 (2018)

• Optimal Design of Piezoelectric Modal Transducers
• Authors: David Ruiz; José Carlos Bellido; Alberto Donoso
Pages: 313 - 347
Abstract: Piezoelectric materials are those having the ability to convert electrical energy into mechanical one, and vice versa. Often surface bonded to structures, they are commonly used for sensing, acting and even for reducing noise and structural vibrations as part of active control systems. And, further, they can isolate specific mode shapes of structures when working as spatial filters in the frequency domain (i.e. modal transducers) by shaping properly the piezoelectric layers. This article is intended to revise that concept, initially conceived for beam-type structures only, and explain how it has been extended to plates and shells by means of optimization techniques.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9200-5
Issue No: Vol. 25, No. 2 (2018)

• Streamlining Digital Modeling and Building Information Modelling (BIM)
Uses for the Oil and Gas Projects
• Authors: Cen-Ying Lee; Heap-Yih Chong; Xiangyu Wang
Pages: 349 - 396
Abstract: The oil and gas industry is a technology-driven industry. Over the last two decades, it has heavily made use of digital modeling and associated technologies (DMAT) to enhance its commercial capability. Meanwhile, the Building Information Modelling (BIM) has grown at an exponential rate in the built environment sector. It is not only a digital representation of physical and functional characteristics of a facility, but it has also made an impact on the management processes of building project lifecycle. It is apparent that there are many similarities between BIM and DMAT usability in the aspect of physical modeling and functionality. The aim of this study is to streamline the usage of both DMAT and BIM whilst discovering valuable practices for performance improvement in the oil and gas projects. To achieve this, 28 BIM guidelines, 83 DMAT academic publications and 101 DMAT vendor case studies were selected for review. The findings uncover (a) 38 BIM uses; (b) 32 DMAT uses and; (c) 36 both DMAT and BIM uses. The synergy between DMAT and BIM uses would render insightful references into managing efficient oil and gas’s projects. It also helps project stakeholders to recognise future investment or potential development areas of BIM and DMAT uses in their projects.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9201-4
Issue No: Vol. 25, No. 2 (2018)

• Smoothed Finite Element Methods (S-FEM): An Overview and Recent
Developments
• Authors: W. Zeng; G. R. Liu
Pages: 397 - 435
Abstract: The smoothed finite element methods (S-FEM) are a family of methods formulated through carefully designed combinations of the standard FEM and some of the techniques from the meshfree methods. Studies have proven that S-FEM models behave softer than the FEM counterparts using the same mesh structure, often produce more accurate solutions, higher convergence rates, and much less sensitivity to mesh distortion. They work well with triangular or tetrahedral mesh that can be automatically generated, and hence are ideal for automated computations and adaptive analyses. Some S-FEM models can also produce upper bound solution for force driving problems, which is an excellent unique complementary feature to FEM. Because of these attractive properties, S-FEM has been applied to numerous problems in the disciplines of material mechanics, biomechanics, fracture mechanics, plates and shells, dynamics, acoustics, heat transfer and fluid–structure interactions. This paper reviews the developments and applications of the S-FEM in the past ten years. We hope this review can shed light on further theoretical development of S-FEM and more complex practical applications in future.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9202-3
Issue No: Vol. 25, No. 2 (2018)

• Bi-directional Evolutionary Structural Optimization on Advanced Structures
and Materials: A Comprehensive Review
• Authors: Liang Xia; Qi Xia; Xiaodong Huang; Yi Min Xie
Pages: 437 - 478
Abstract: The evolutionary structural optimization (ESO) method developed by Xie and Steven (Comput Struct 49(5):885–896, 162), an important branch of topology optimization, has undergone tremendous development over the past decades. Among all its variants, the convergent and mesh-independent bi-directional evolutionary structural optimization (BESO) method developed by Huang and Xie (Finite Elem Anal Des 43(14):1039–1049, 48) allowing both material removal and addition, has become a widely adopted design methodology for both academic research and engineering applications because of its efficiency and robustness. This paper intends to present a comprehensive review on the development of ESO-type methods, in particular the latest convergent and mesh-independent BESO method is highlighted. Recent applications of the BESO method to the design of advanced structures and materials are summarized. Compact Malab codes using the BESO method for benchmark structural and material microstructural designs are also provided.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9203-2
Issue No: Vol. 25, No. 2 (2018)

• Multiscale Computational Homogenization: Review and Proposal of a New
Enhanced-First-Order Method
• Authors: Fermin Otero; Sergio Oller; Xavier Martinez
Pages: 479 - 505
Abstract: The continuous increase of computational capacity has encouraged the extensive use of multiscale techniques to simulate the material behaviour on several fields of knowledge. In solid mechanics, the multiscale approaches which consider the macro-scale deformation gradient to obtain the homogenized material behaviour from the micro-scale are called first-order computational homogenization. Following this idea, the second-order FE2 methods incorporate high-order gradients to improve the simulation accuracy. However, to capture the full advantages of these high-order framework the classical boundary value problem (BVP) at the macro-scale must be upgraded to high-order level, which complicates their numerical solution. With the purpose of obtaining the best of both methods i.e. first-order and second-order, in this work an enhanced-first-order computational homogenization is presented. The proposed approach preserves a classical BVP at the macro-scale level but taking into account the high-order gradient of the macro-scale in the micro-scale solution. The developed numerical examples show how the proposed method obtains the expected stress distribution at the micro-scale for states of structural bending loads. Nevertheless, the macro-scale results achieved are the same than the ones obtained with a first-order framework because both approaches share the same macro-scale BVP.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9205-0
Issue No: Vol. 25, No. 2 (2018)

• Plant Species Identification Using Computer Vision Techniques: A
Systematic Literature Review
• Authors: Jana Wäldchen; Patrick Mäder
Pages: 507 - 543
Abstract: Species knowledge is essential for protecting biodiversity. The identification of plants by conventional keys is complex, time consuming, and due to the use of specific botanical terms frustrating for non-experts. This creates a hard to overcome hurdle for novices interested in acquiring species knowledge. Today, there is an increasing interest in automating the process of species identification. The availability and ubiquity of relevant technologies, such as, digital cameras and mobile devices, the remote access to databases, new techniques in image processing and pattern recognition let the idea of automated species identification become reality. This paper is the first systematic literature review with the aim of a thorough analysis and comparison of primary studies on computer vision approaches for plant species identification. We identified 120 peer-reviewed studies, selected through a multi-stage process, published in the last 10 years (2005–2015). After a careful analysis of these studies, we describe the applied methods categorized according to the studied plant organ, and the studied features, i.e., shape, texture, color, margin, and vein structure. Furthermore, we compare methods based on classification accuracy achieved on publicly available datasets. Our results are relevant to researches in ecology as well as computer vision for their ongoing research. The systematic and concise overview will also be helpful for beginners in those research fields, as they can use the comparable analyses of applied methods as a guide in this complex activity.
PubDate: 2018-04-01
DOI: 10.1007/s11831-016-9206-z
Issue No: Vol. 25, No. 2 (2018)

• A Brief Review and a New Graph-Based Image Analysis for Concrete Crack
Quantification
• Authors: Mahsa Payab; Reza Abbasina; Mostafa Khanzadi
Abstract: This paper surveys development using image-based methods for crack analysis in the last two-decade (2002–2016).This study aimed to extract and quantify the individual cracks in concrete surfaces, using a new automated image-based system. In general, an individual crack can appear in concrete structures as one of the three common configurations including longitudinal, transverse, and diagonal cracks. These kinds of cracks propagate inherently as linear, and may be involved in branching and spalling at some point of the original path. The main contribution of this work is twofold. First, the main mother crack is extracted using the graph theory and simulates the crack group proportionally. Second, the exact width of cracks can be measured automatically. The procedure has been automated in this study to calculate the individual crack characteristics including the length, average width, and orientation. Furthermore, the analytical results are presented as the distribution of accurate width variations along the length of the skeleton, maximum crack width and its location on the crack and graph. The results indicated that the proposed image-based crack quantification method can accurately measure changing the crack characteristics like width along it. It is demonstrated that the proposed method is applicable and shows good performance in conventional assessment of distressed concrete surfaces.
PubDate: 2018-03-20
DOI: 10.1007/s11831-018-9263-6

• Correction to: Review of Robust Aerodynamic Design Optimization for Air
Vehicles
• Authors: Huan Zhao; Zhenghong Gao; Fang Xu; Yidian Zhang
Abstract: The publisher and the authors apologize to the readership for the proofing error in Sect. 3.3.3 which has been thus re-corrected in original article. In Sect. 3.3.3, on p. 20, all the inaccurate formulae “ $$f\left( {\mathbf{Z}} \right),\psi_{i}$$ ” have been re-corrected with $$\langle f\left( {\mathbf{Z}} \right),\psi_{i} \rangle$$ indicating the inner product (six times).
PubDate: 2018-03-16
DOI: 10.1007/s11831-018-9264-5

• Current and Emerging Time-Integration Strategies in Global Numerical
Weather and Climate Prediction
• Authors: Gianmarco Mengaldo; Andrzej Wyszogrodzki; Michail Diamantakis; Sarah-Jane Lock; Francis X. Giraldo; Nils P. Wedi
Abstract: The continuous partial differential equations governing a given physical phenomenon, such as the Navier–Stokes equations describing the fluid motion, must be numerically discretized in space and time in order to obtain a solution otherwise not readily available in closed (i.e., analytic) form. While the overall numerical discretization plays an essential role in the algorithmic efficiency and physically-faithful representation of the solution, the time-integration strategy commonly is one of the main drivers in terms of cost-to-solution (e.g., time- or energy-to-solution), accuracy and numerical stability, thus constituting one of the key building blocks of the computational model. This is especially true in time-critical applications, including numerical weather prediction (NWP), climate simulations and engineering. This review provides a comprehensive overview of the existing and emerging time-integration (also referred to as time-stepping) practices used in the operational global NWP and climate industry, where global refers to weather and climate simulations performed on the entire globe. While there are many flavors of time-integration strategies, in this review we focus on the most widely adopted in NWP and climate centers and we emphasize the reasons why such numerical solutions were adopted. This allows us to make some considerations on future trends in the field such as the need to balance accuracy in time with substantially enhanced time-to-solution and associated implications on energy consumption and running costs. In addition, the potential for the co-design of time-stepping algorithms and underlying high performance computing hardware, a keystone to accelerate the computational performance of future NWP and climate services, is also discussed in the context of the demanding operational requirements of the weather and climate industry.
PubDate: 2018-02-23
DOI: 10.1007/s11831-018-9261-8

• Review of Robust Aerodynamic Design Optimization for Air Vehicles
• Authors: Zhao Huan; Gao Zhenghong; Xu Fang; Zhang Yidian
Abstract: The ever-increasing demands for risk-free, resource-efficient and environment-friendly air vehicles motivate the development of advanced design methodology. As a particularly promising design methodology considering uncertainties, robust aerodynamic design optimization (RADO) is capable of providing robust and reliable aerodynamic configuration and reducing cost under probable uncertainties in the flight envelop and all life cycle of air vehicle. However, the major challenges including high computational cost with increasing dimensionality of uncertainty and complex RADO procedure hinder the wider application of RADO. In this paper, the complete RADO procedure, i.e., uncertainty modeling, establishment of uncertainty quantification approach as well as robust optimization subject to reliability constraints under uncertainty, is elaborated. Systematic reviews of RADO methodology including uncertainty modeling methods, comprehensive uncertainty quantification approaches, and robust optimization methods are provided. Further, this paper presents a brief survey of the main applications of RADO in the aerodynamic design of transonic flow and natural-laminar-flow, and discusses the application prospects of RADO methodology for air vehicles. The detailed statement of the paper indicates the intention, i.e., to present the state of the art in RADO methodology, to highlight the key techniques and primary challenges in RADO, and to provide the beneficial directions for future researches.
PubDate: 2018-02-19
DOI: 10.1007/s11831-018-9259-2

• High Performance Reduced Order Modeling Techniques Based on Optimal Energy
Quadrature: Application to Geometrically Non-linear Multiscale Inelastic
Material Modeling
• Authors: Manuel Caicedo; Javier L. Mroginski; Sebastian Toro; Marcelo Raschi; Alfredo Huespe; Javier Oliver
Abstract: A High-Performance Reduced-Order Model (HPROM) technique, previously presented by the authors in the context of hierarchical multiscale models for non linear-materials undergoing infinitesimal strains, is generalized to deal with large deformation elasto-plastic problems. The proposed HPROM technique uses a Proper Orthogonal Decomposition procedure to build a reduced basis of the primary kinematical variable of the micro-scale problem, defined in terms of the micro-deformation gradient fluctuations. Then a Galerkin-projection, onto this reduced basis, is utilized to reduce the dimensionality of the micro-force balance equation, the stress homogenization equation and the effective macro-constitutive tangent tensor equation. Finally, a reduced goal-oriented quadrature rule is introduced to compute the non-affine terms of these equations. Main importance in this paper is given to the numerical assessment of the developed HPROM technique. The numerical experiments are performed on a micro-cell simulating a randomly distributed set of elastic inclusions embedded into an elasto-plastic matrix. This micro-structure is representative of a typical ductile metallic alloy. The HPROM technique applied to this type of problem displays high computational speed-ups, increasing with the complexity of the finite element model. From these results, we conclude that the proposed HPROM technique is an effective computational tool for modeling, with very large speed-ups and acceptable accuracy levels with respect to the high-fidelity case, the multiscale behavior of heterogeneous materials subjected to large deformations involving two well-separated scales of length.
PubDate: 2018-02-17
DOI: 10.1007/s11831-018-9258-3

• Pressure–Impulse (P–I) Diagrams for Reinforced Concrete (RC)
Structures: A Review
• Authors: M. Abedini; Azrul A. Mutalib; Sudharshan N. Raman; R. Alipour; E. Akhlaghi
Abstract: In recent years, many studies have been conducted by governmental and nongovernmental organizations across the world attempt to better understand the effect of blast loads on structures in order to better design against specific threats. Pressure–Impulse (P–I) diagram is an easiest method for describing a structure’s response to blast load. Therefore, this paper presents a comprehensive overview of P–I diagrams in RC structures under blast loads. The effects of different parameters on P–I diagram is performed. Three major methods to develop P–I diagram for various damage criterions are discussed in this research. Analytical methods are easy and simple to use but have limitations on the kinds of failure modes and unsuitable for complex geometries and irregular shape of pulse loads that they can capture. Experimental method is a good way to study the structure response to blast loads; however, it is require special and expensive instrumentation and also not possible in many cases due to the safety and environmental consideration. Despite numerical methods are capable of incorporating complex features of the material behaviour, geometry and boundary conditions. Hence, numerical method is suggested for developing P–I diagrams for new structural elements.
PubDate: 2018-02-13
DOI: 10.1007/s11831-018-9260-9

• Quantitative Parametrization of Mixture Distribution in GDI Engines: A CFD
Analysis
• Authors: S. Krishna Addepalli; J. M. Mallikarjuna
Abstract: This paper presents an objective classification of mixture distribution in the combustion chamber of a gasoline direct injection (GDI) engine into homogeneous and non-homogeneous types. The non-homogeneous mixture distribution is further classified as properly stratified, improperly stratified and mal-distributed types. Based on this classification, four types of properly stratified mixture distributions viz., random, linear, Gaussian and parabolic are virtually simulated in the combustion chamber of a GDI engine using computational fluid dynamics to identify the mixture that results in maximum indicated mean effective pressure (IMEP). It is found that the IMEP is highest for the parabolic mixture distribution which is followed by Gaussian, linear and random types. The performance and emission characteristics of the virtual mixture distributions are compared with a late fuel injection case at different over all equivalence ratios ranging from 0.3 to 0.7. Then the variation of mixture equivalence ratio with the distance from the spark plug is parametrized for different virtual mixture distribution cases and expressed using a parameter called the “stratification index”. It is found that the stratification index based on Gaussian variation gives maximum information about the mixture distribution in the combustion chamber. Finally the stratification index of different virtual mixture distributions is compared with the late fuel injection case at various overall equivalence ratios. It is found that the late fuel injection case tends to produce highest IMEP when the stratification index is close to unity.
PubDate: 2018-02-12
DOI: 10.1007/s11831-018-9262-7

• Image Segmentation Using Computational Intelligence Techniques: Review
• Authors: Siddharth Singh Chouhan; Ajay Kaul; Uday Pratap Singh
PubDate: 2018-02-07
DOI: 10.1007/s11831-018-9257-4

• Applied and Theoretical Aspects of Conjugate Heat Transfer Analysis: A
Review
• Authors: Bibin John; P. Senthilkumar; Sreeja Sadasivan
Abstract: This paper documents all the important works in the field of conjugate heat transfer study. Theoretical and applied aspects of conjugate heat transfer analysis are reviewed and summarized to a great extent on the light of available literature in this field. Over the years, conjugate heat transfer analysis has been evolved as the most effective method of heat transfer study. In this approach the mutual effects of thermal conduction in the solid and convection in the fluid are considered in the analysis. Various analytical and computational studies are reported in this field. Comprehension of analytical as well as computational studies of this field will help the researchers and scientists who work in this area to progress in their research. That is the focus of this review. Early analytical studies related to conjugate heat transfer are reviewed and summarised in the first part of this paper. Background of theoretical studies is discussed briefly. More importance is given in summarising the computational studies in this field. Different coupling techniques proposed to date are presented in great detail. Important studies narrating the application of conjugate heat transfer analysis are also discussed under separate headings. Hence the present paper gives complete theoretical background of Conjugate heat transfer along with direction to its application envelope.
PubDate: 2018-01-27
DOI: 10.1007/s11831-018-9252-9

• An Overview of PCNN Model’s Development and Its Application in Image
Processing
• Authors: Zhen Yang; Jing Lian; Yanan Guo; Shouliang Li; Deyuan Wang; Wenhao Sun; Yide Ma
Abstract: In this paper, recent pulse coupled neural networks (PCNN) model’s development, especially in the fields related to the image processing, were surveyed. Our review aims to provide a comprehensive and systematic analysis of selected researches from past few decades, having powerful methods to infer the area of study. In this paper, all selected references are categorized in three groups, on the basis of neurons structure, parameters setting, and the inherent characteristics of PCNN. Various applications of these models were mentioned and underlying difficulties, limitations, merits and disadvantages were discussed in applying these models. The researchers will find it helpful to choose and use the appropriate model for a better application.
PubDate: 2018-01-24
DOI: 10.1007/s11831-018-9253-8

• A Critical Review of Multi-hole Drilling Path Optimization
• Authors: Reginald Dewil; İlker Küçükoğlu; Corrinne Luteyn; Dirk Cattrysse
Abstract: Hole drilling is one of the major basic operations in part manufacturing. It follows without surprise then that the optimization of this process is of great importance when trying to minimize the total financial and environmental cost of part manufacturing. In multi-hole drilling, 70% of the total process time is spent in tool movement and tool switching. Therefore, toolpath optimization in particular has attracted significant attention in cost minimization. This paper critically reviews research publications on drilling path optimization. In particular, this review focuses on three aspects; problem modeling, objective functions, and optimization algorithms. We conclude that most papers being published on hole drilling are simply basic Traveling Salesman Problems (TSP) for which extremely powerful heuristics exist and for which source code is readily available. Therefore, it is remarkable that many researchers continue developing “novel” metaheuristics for hole drilling without properly situating those approaches in the larger TSP literature. Consequently, more challenging hole drilling applications that are modeled by the Precedence Constrained TSP or hole drilling with sequence dependent drilling times do not receive much research focus. Sadly, these many low quality hole drilling research publications drown out the occasional high quality papers that describe specific problematic problem constraints or objective functions. It is our hope through this review paper that researchers’ efforts can be refocused on these problem aspects in order to minimize production costs in the general sense.
PubDate: 2018-01-22
DOI: 10.1007/s11831-018-9251-x

• Letter to the Editor: Discussion on the Paper “State-of-the-Art of
Research on Seismic Pounding Between Buildings with Aligned Slabs”
• Authors: Robert Jankowski
PubDate: 2018-01-19
DOI: 10.1007/s11831-018-9254-7

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