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Cesar Acosta¹, F. Peñuñuri¹, O. Carvente¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-11, 2022, DOI:10.23967/j.rimni.2022.03.007 - 17 March 2022
Abstract Measuring fractal dimension in general is made over edges of a figure, however this kind of calculations could be made over a 1D, 2D or even a 3D images. With the FracLac plugin of ImageJ application, it has been possible to measure both dimensions, over the area and over the edge of a Mandelbrot fractal, using the Box Counting technique. More >

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Ebrahim Ahmadi¹, Yousef Zandi², Mohammad Ghasem Vetr³, Hassanali, Mosalman Yazdi⁴
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-15, 2022, DOI:10.23967/j.rimni.2022.02.001 - 01 February 2022
Abstract In this research, steel furnace slag, fly ash and new synthesized polycarboxylate was used to replace cement in concrete composition. Concrete was made in three grades of 400, 450 and 500 using steel furnace slag, fly ash and polymer with different percentages of dry weight. Also, the amount of water to cement was selected as one of the effective parameters in concrete strength and production costs. The results showed that slag percent had a positive effect on improving samples strength. Also, increasing the percentage of polycarboxylate and decreasing the amount of water per cement ratio More >

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Balqis Mohd Azman^1,2, Saiful Izzuan Hussain^1,2, Nor Aniza Azmi³, Muhammad Zahin Athir Abd Ghani³, Nor Irfan Danial Norlen³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-10, 2022, DOI:10.23967/j.rimni.2022.03.006 - 22 March 2022
Abstract Breast cancer is the most common cancer diagnosed in women, and it is ranked as the second highest cancer with high mortality rate. Breast-cancer recurrence is the cancerous tumor that returned after treatment. Cancer treatments such as radiotherapy are performed mainly to kill cancer cells; however, some cells may have survived and multiply themselves at the same area as the original cancer (local recurrence) or to any other part (distant recurrence). Distant recurrence occurs when cancer cells spread to other parts of the body, most commonly to bone, breast, liver, and lungs. This study employed More >

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ARTICLE

Júlio César Ferreira¹, Maria Teresinha Arns Steiner¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-17, 2022, DOI:10.23967/j.rimni.2022.01.001 - 14 January 2022
Abstract Logistic distribution involves many costs for organizations. Therefore, opportunities for optimization in this respect are always welcome. The purpose of this work is to present a methodology to provide a solution to a complexity task of optimization in Multi-objective Optimization for Green Vehicle Routing Problem (MOOGVRP). The methodology, illustrated using a case study (employee transport problem) and instances from the literature, was divided into three stages: Stage 1, “data treatment”, where the asymmetry of the routes to be formed and other particular features were addressed; Stage 2, “metaheuristic approaches” (hybrid or non-hybrid), used comparatively, more… More >

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ARTICLE

Andrés González-Fallas¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-10, 2022, DOI:10.23967/j.rimni.2022.03.011 - 31 March 2022
Abstract The use of tensegrity structures in robotics has been studied in recent years thanks to their properties of light weight, efficient distribution of forces and the possibility of applying control methods for the active shape reconfiguration, with crawling and rolling as examples. The structural composition of tensegrities, particularly the use of tensile elements, results in the presence of infinitesimal mechanisms. These affine motions have been considered for the development of control strategies that follow the manifold of stable positions described by these mechanisms. However, in robotic applications, the presence of rigid body motions can cause… More >

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ARTICLE

Mehdi Khanloo¹, Heydar Dashti Naserabadi², Morteza Jamshidi¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-4, 2022, DOI:10.23967/j.rimni.2021.12.005 - 03 January 2022
Abstract One of the most common methods of strengthening concrete structures is the use of composite fibers such as FRP. These fibers have found a special place in structural retrofitting methods due to a number of specific ability including lightness and ease of performance. Reinforced concrete structures have long been considered by design engineers for the possibility of retrofitting high strength composite steel structures. In this study, twenty-two steel beam models were modeled by ANSYS software. Variable parameters studied in the modeled steel beams can be referred to the number, orientation and thickness of composite layers. More >

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ARTICLE

Li, Ping¹, Zhijian Chen², Yi Ding³
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-13, 2022, DOI:10.23967/j.rimni.2022.03.008 - 17 March 2022
Abstract In practice, the consolidation of soil around the pile has a great influence on the time-dependent bearing capacity of pile. However, most of the consolidation theory of soil around the pile neglects the disturbance effect of pile-driving on surrounding soil and regards the soil as homogeneous, which overestimates the consolidation efficiency of the soil, and obtains a higher pile bearing capacity. In view of this, a consolidation model of soil around a pipe pile considering soil disturbance effect is presented in this paper. Fourier transform and separation of variables are used to obtain the analytical… More >

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Liang Ye¹, Jun Shao¹, Pingping Sun², Weijia Lv³, Mingsen Fang¹, Yang Jin¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-8, 2022, DOI:10.23967/j.rimni.2022.03.005 - 23 March 2022
Abstract Rainfall infiltration is an important factor affecting the stability of the ancient city wall. To state the wall line spring door where, for example, soil temperature and humidity sensor, the earth pressure meter and rain gauge carried out such as rainfall, volume moisture content and soil pressure monitoring, analyzed the inner core wall soil volume moisture content and soil pressure response law of rainfall different rainfall conditions is studied through numerical simulation method the stability of the ancient city wall. The results show that :(1) rainfall has a significant effect on the volume moisture content More >

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ARTICLE

Giovanny Morocho, Diego Carrión¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-17, 2022, DOI:10.23967/j.rimni.2022.03.010 - 30 March 2022
Abstract The present research proposes to design and apply a state estimator algorithm in electrical power systems, applying the Weighted Least Squares methodology, through a process called non-linear hybrid estimator, the same one that uses measurements from PMUs and conventional measurements. in addition, to find the optimal PMU locations respecting the observability and redundancy restrictions for the Electric Power Systems, through mixed integer linear programming, considering the N-1 contingencies in the SEP. The proposed state estimator is adjusted to the measurements obtained, in the presence of contingencies in the SEP. The simulations obtained as a result More >

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ARTICLE

A. Olfati¹, M. Rahimi², M. Ravanshadnia¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-6, 2022, DOI:10.23967/j.rimni.2021.12.003 - 03 January 2022
Abstract Debris treatment after earthquakes is very important matter especially after large-scale disasters. Efficient debris treatment is leading to faster reconstruction. Particularly, this article examines fuzziness in debris treatment planning. The problem reduces to a standard transport problem by fundamental formulation. A fuzzy debris transport problem for supply and demand formulated fuzzy constraints. A problem-solving algorithm by referring numerical example demonstrates an irrelevant approach. Realistic debris transport planning can be defined by using the recommended method. More >

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REVIEW

Pooyan Rahmanivahid¹, Milad Heidari¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-10, 2022, DOI:10.23967/j.rimni.2022.03.002 - 07 March 2022
Abstract An ideal dental implant is a design that maximizes the anchorage strength of implants in human jawbones and minimizes peak stress values in bone-implant interfaces under given standard loads. The stress concentration at the bone-implant contact is controlled by implant design, which determines the bone biological response. Implant design has improved as a result of marketing demands. The modification of shape, size, material, and surface topography of primary designs has been the focus of dental implant design in response to marketing needs. Since the integration of bone-implant has been highlighted in dentistry investigations, improving implant More >

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Marcos Sanz-Ramos^1,2, Gonzalo Olivares², Ernest Bladé²
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-12, 2022, DOI:10.23967/j.rimni.2022.03.012 - 29 March 2022
Abstract Permeable pavements are a common solution for wearing course layers in roads and urban areas. They are composed by highly porous materials with permeability several orders of magnitude above of the natural terrain. This work presents, on one hand, the experimental characterisation of the hydraulic behaviour of a permeable asphalt concrete wearing course layer and, on the other hand, the development and validation of a two-dimensional coupled hydraulic-hydrological distributed numerical model to reproduce the effect of the infiltration in the rainfall-runoff transformation and in the overland flow propagation processes. Experiments show linear and potential trends… More >

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Mohammad Hassan Shojaeefard¹, Morteza Mollajafari², Seyed Hamid Reza Mousavitabar³, Mohammad Worya Khordehbinan⁴, Hossein Hosseinalibeiki⁵
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-11, 2022, DOI:10.23967/j.rimni.2022.03.001 - 08 March 2022
Abstract The distribution of goods and urban services has made the issue of vehicle routing of particular importance to researchers. Advanced Routing Vehicle (RVRP) Rich Vehicle Routing Problem As a hybrid optimization problem, it is widely used in many transportation and logistics planning. The approach of this paper is to present a heuristic method for solving the problem called Nested Clustering for Traveling Salesman Problem (NC-TSP), in this method to optimize the search space, we break the problem in consecutive space. In the first step, using the nearest neighbor (Knn) algorithm with the center of each More >

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Francisco Zarate^1,2, Juan Jose Cuellar³, MIGUEL SANTANA⁴, JAQUELINE MATA SAAVEDRA
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-9, 2022, DOI:10.23967/j.rimni.2022.03.003 - 07 March 2022
Abstract The objectives of this work are focused on giving an answer to the problems presented in the operation of a railway bridge, using the FEM-DEM numerical technique considering static and dynamic loads. The purpose is to find out the existing breakage mechanisms in the bridge.
From a social aspect, there is concern about the possible collapse of the bridge, with the corresponding economic loss and eventually human losses; therefore, the interest and social involvement of the study has repercussions not only on the repair mechanisms that can be adopted but also on the possible revision of… More >

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Youji Zhan¹, Jiaqi Zhou¹, Zhen Zuo¹, Yongchao Xu¹, Xiaoshui Li¹, Minzhong Jia¹
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-18, 2022, DOI:10.23967/j.rimni.2022.03.004 - 10 March 2022
Abstract Saving energy is one of the ways to achieve sustainable development. As an important equipment for manufacturing, machine tool has the characteristics of high energy consumption and high emission. In order to cope with reducing energy consumption and carbon emissions without reducing processing quality, the search for optimal cutting parameters requires balancing the contradiction between machining quality and cutting energy consumption, so that cutting parameters can both reduce energy consumption and ensure the quality of processing. It plays an important role in achieving energy saving and emission reduction. In this paper, the processing quality (residual More >

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Xiaobo Zheng^1,2, Zuolong Luo^3,*, Yongfei Zhang^1,2, Shichao Wang^1,2, Leping Ren⁴
Revista Internacional de Métodos Numéricos para Cálculo y Diseño en Ingeniería, Vol.38, No.1, pp. 1-19, 2022, DOI:10.23967/j.rimni.2022.03.009 - 16 March 2022
Abstract Structural robustness, an index for structural geometrical agreement, is used to assess the alternative load paths of structures subjected to loads. Therefore, robustness can be extended to evaluate the robustness of bridges with local failure in individual members. In this work, a method that includes the use of a radar chart is proposed to assess the robustness of cable-stayed bridges by considering the mechanical performance of bridges with local failure in the cables and chords. Four plans regarding the truss girder and cables are designed to reinforce a damaged bridge. The results indicate that these… More >

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