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Article
Publication date: 14 March 2019

Pedro G.P. Leite and Gilberto Gomes

The purpose of this paper is to present the application of the boundary element method (BEM) in linear elastic fracture mechanics for analysis of fatigue crack propagation…

Abstract

Purpose

The purpose of this paper is to present the application of the boundary element method (BEM) in linear elastic fracture mechanics for analysis of fatigue crack propagation problems in mixed-mode (I+II) using a robust academic software named BemCracker2D and its graphical interface BemLab2D.

Design/methodology/approach

The methodology consists in calculating elastic stress by conventional BEM and to carry out an incremental analysis of the crack extension employing the dual BEM (DBEM). For each increment of the analysis, the stress intensity factors (SIFs) are computed by the J-Integral technique, the crack growth direction is evaluated by the maximum circumferential stress criterion and the crack growth rate is computed by a modified Paris equation, which takes into account an equivalent SIF to obtain the fracture Modes I and II. The numerical results are compared with the experimental and/or BEM values extracted from the open literature, aiming to demonstrate the accuracy and efficiency of the adopted methodology, as well as to validate the robustness of the programs.

Findings

The paper addresses the numerical simulation of fatigue crack growth. The main contribution of the paper is the introduction of a software for simulating two-dimensional fatigue crack growth problems in mixed-mode (I+II) via the DBEM. The software BemCracker2D coupled to the BemLab2D graphical user interface (GUI), for pre/post-processing, are very complete, efficient and versatile and its does make relevant contributions in the field of fracture mechanics.

Originality/value

The main contribution of the manuscript is the development of a GUI for pre/post-processing of 2D fracture mechanics problems, as well as the object oriented programming implementation. Finally, the main merit is of educational nature.

Details

International Journal of Structural Integrity, vol. 10 no. 4
Type: Research Article
ISSN: 1757-9864

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Article
Publication date: 18 July 2019

Gilberto Gomes, Alvaro Martins Delgado Neto, Luciano Mendes Bezerra and Ramon Silva

The purpose of this paper is to describe further developments on a novel formulation of the boundary element method (BEM) for inelastic problems using the dual reciprocity…

Abstract

Purpose

The purpose of this paper is to describe further developments on a novel formulation of the boundary element method (BEM) for inelastic problems using the dual reciprocity method (DRM) but using object-oriented programming (OOP). As the BEM formulation generates a domain integral due to the inelastic stresses, the DRM is employed in a modified form using polyharmonic spline approximating functions with polynomial augmentation. These approximating functions produced accurate results in BEM applications for a range of problems tested, and have been shown to converge linearly as the order of the function increases.

Design/methodology/approach

A programming class named DRMOOP, written in C++ language and based on OOP, was developed in this research. With such programming, general matrix equations can be easily established and applied to different inelastic problems. A vector that accounts for the influence of the inelastic strains on the displacements and boundary forces is obtained.

Findings

The C++ DRMOOP class has been implemented and tested with the BEM formulation applied to classical elastoplastic problem and the results are reported at the end of the paper.

Originality/value

An object-oriented technology and the C++ DRMOOP class applied to elastoplastic problems.

Details

Multidiscipline Modeling in Materials and Structures, vol. 15 no. 5
Type: Research Article
ISSN: 1573-6105

Keywords

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Article
Publication date: 20 August 2019

Gilberto Santos, Sergio Gomes, Vitor Braga, Alexandra Braga, Vanda Lima, Paulo Teixeira and José Carlos Sá

The purpose of this paper is to analyze the best way to create value in Portugal through quality and innovation and also to check what needs to be improved.

Abstract

Purpose

The purpose of this paper is to analyze the best way to create value in Portugal through quality and innovation and also to check what needs to be improved.

Design/methodology/approach

A questionnaire was applied to population of 152 companies, with the research and development (R&D) management certified by Portuguese Standard NP 4457. The final sample was 66 companies, which correspond to 45 percent of the population. Statistical analysis of the data collected was performed using IBM SPSS Statistical Software.

Findings

The authors highlighted the main reasons/motivations that led companies to implement the NP 4457, which were, among others, competitive advantage and creating value. The systematization of information and the generation and management of ideas were highlighted as the main advantages. The lack of methodologies for innovation management and knowledge management was the difficulty experienced in the implementation of NP 4457. Portugal needs to increase patent registration and it also needs to know how to take advantage of the investment made in R&D, in order to decrease the unit cost of knowledge. Portuguese engineering should be more about product design than production processes. The involvement of top management must be greater.

Originality/value

This investigation contributes to the innovation and quality body of knowledge, since it explores the complementarity between the two concepts as sources of value creation. This case study is one of the first Portuguese empirical research works about value creation through quality and innovation in Portugal. It also allows to know in detail the Portuguese business reality in terms of innovation management.

Details

The TQM Journal, vol. 31 no. 6
Type: Research Article
ISSN: 1754-2731

Keywords

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Article
Publication date: 24 December 2020

Karina M. Serrano, Glauco H.S. Mendes, Fabiane L. Lizarelli and Gilberto M.D. Ganga

This study aimed to find factors influencing the acceptance of telemedicine for adults in Brazil. Moreover, it investigates the moderating role of disease complexity and…

Abstract

Purpose

This study aimed to find factors influencing the acceptance of telemedicine for adults in Brazil. Moreover, it investigates the moderating role of disease complexity and the generational digital divide phenomenon on the intention to use the telemedicine service.

Design/methodology/approach

A quasi-experiment was employed. Primary data were collected using a survey research method considering two different scenarios based on disease complexity and symptom severity. A total of 248 responses were collected using a structured questionnaire. The authors also tested these two scenarios in three generations (X, Y and Z) of adults. Partial least squares structural equation modeling (PLS-SEM) was used to analyze the collected data and test the research hypotheses.

Findings

The results indicated that performance expectancy and perceived security and reliability are two predictors of the behavioral intention to use telemedicine, whereas effort expectancy and social influence showed no statistical significance. Furthermore, the results demonstrated that adults tend to adopt telemedicine regardless of the level of disease complexity. Finally, this study does not support the existence of a digital divide in the three generations.

Originality/value

The study applies the UTAUT model to assess the telemedicine acceptance for younger generations. It examines patient risk perception (security and reliability) as one antecedent of telemedicine acceptance.

Details

International Journal of Health Care Quality Assurance, vol. 34 no. 1
Type: Research Article
ISSN: 0952-6862

Keywords

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Book part
Publication date: 6 August 2018

Mario Aquino Alves and Marcus Vinícius Peinado Gomes

We analyze how Brazilian Black Movement organizations and banks deployed different mechanisms like cooperation, cooptation, and confrontation that generated affirmative…

Abstract

We analyze how Brazilian Black Movement organizations and banks deployed different mechanisms like cooperation, cooptation, and confrontation that generated affirmative action initiatives in the banking sector at the beginning of this century. Black movement organizations triggered an institutional change by connecting fields and exploring a constellation of strategies. However, Brazilian banks adopted defensive strategies aiming to accommodate their interests. We find that only piecemeal change occurred, as the field’s structures – resource distribution and power – remained unscratched. We conclude by noting how the success of social movement strategies can depend upon the framing and sense-giving work that social movements conduct in their continuous jockeying activity toward incumbents.

Details

Social Movements, Stakeholders and Non-Market Strategy
Type: Book
ISBN: 978-1-78754-349-2

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Article
Publication date: 14 August 2019

Ricardo Oliveira Rotondano

The purpose of this paper is to analyse empirically the racial relations of segregation of the black population in the city of Salvador, Brazil, which built according to a…

Abstract

Purpose

The purpose of this paper is to analyse empirically the racial relations of segregation of the black population in the city of Salvador, Brazil, which built according to a subtle model of the construction of differentiated spaces for the white population and the black population in the city.

Design/methodology/approach

The methodology used for the construction of this manuscript was that of the action research, through the insertion of the researcher within the field of study, obtaining observational perceptions of the inhabited place and collecting reports of the research subjects inserted in the field of study.

Findings

The present research obtained as final results the explicit characterisation of a veiled and subtle model of racial segregation imposed on the black population of the city of Salvador, manifesting the clear prejudice of the white population and also a state racism directed to the oppressed black population.

Originality/value

The originality of the research consists in the fact that there is no research modality within Brazil for the analysis of historical apartheid policies. The Brazilian state, in this sense, appears within the current framework of academic research as a clear incentive and propagator of governmental actions that corroborate the maintenance of the exclusionary city system, which separates the black and white population in differentiated social spaces.

Details

International Journal of Sociology and Social Policy, vol. 39 no. 11/12
Type: Research Article
ISSN: 0144-333X

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Article
Publication date: 16 August 2021

Camila Favoretto, Glauco Henrique de Sousa Mendes, Moacir Godinho Filho, Maicon Gouvea de Oliveira and Gilberto Miller Devós Ganga

The challenges of digital transformation (DT) have gained attention from both academics and practitioners, as more manufacturing companies are seeking digital technology…

Abstract

Purpose

The challenges of digital transformation (DT) have gained attention from both academics and practitioners, as more manufacturing companies are seeking digital technology implementation. This study, therefore, aims to identify the challenges of DT in manufacturing companies and propose new research directions.

Design/methodology/approach

A systematic literature review considering 176 articles (published between 2003 and 2019) was used to build a conceptual framework of DT.

Findings

A systematized view of challenges regarding organizational commitment, value creation, value proposition, value delivery, value capture, information and technology infrastructure and data security were identified. Moreover, a conceptual framework was developed to summarize the challenges and how they are associated with the business model value architecture and with the DT phases. Research opportunities for future research were also identified, contributing to the advancement of the topic.

Originality/value

First, the study provides a categorization of the main challenges of DT in manufacturing companies. Second, it identifies research gaps and future research avenues; and finally, it proposes a conceptual framework that aims to support more rigorous studies and guide management decisions regarding an integrative understanding of DT.

Details

Journal of Business & Industrial Marketing, vol. ahead-of-print no. ahead-of-print
Type: Research Article
ISSN: 0885-8624

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Book part
Publication date: 30 November 2017

Felippe de Medeiros Oliveira, Gazi Islam and Maria Laura Toraldo

Recent interest in the multimodal accomplishment of organization has focused on the material and symbolic aspects of materiality. We argue that current literature invokes…

Abstract

Recent interest in the multimodal accomplishment of organization has focused on the material and symbolic aspects of materiality. We argue that current literature invokes diverse “multimodal imaginaries,” that is, ways of conceiving the relation between the material and the conceptual, and that the different imaginaries support a plurality of perspectives on materiality. Using the empirical case of a large urban renewal project in São Paulo, Brazil, we illustrate three different multimodal imaginaries – the concrete, the semiotic, and the mimetic – and indicate how each imaginary determines the way in which the site in question is discursively constructed. After outlining the different approaches, we discuss their theoretical implications, advantages, and constraints, setting an agenda for future studies of materiality in organizational and institutional contexts.

Details

Multimodality, Meaning, and Institutions
Type: Book
ISBN: 978-1-78743-330-4

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Article
Publication date: 21 September 2012

Roberto Viganò and Gilberto Osorio Gómez

The purpose of this paper is to define an approach to extract the liaison graph from a 3D CAD model and analyze a method to find at least a feasible assembly sequence for…

Abstract

Purpose

The purpose of this paper is to define an approach to extract the liaison graph from a 3D CAD model and analyze a method to find at least a feasible assembly sequence for the product. The method could be useful to search the optimal sequence of assembling for a product, by comparing different sequences extracted in automatic mode from a 3D CAD model.

Design/methodology/approach

The method proposed analyzes the liaison graph extracted, in order to obtain the possible assembly sequences for the product under study. The extraction of the sequences is based on some attributes and parameters of the graph.

Findings

By means of the method proposed it is possible to obtain in automatic mode the liaison graph of an assembly 3D CAD model. Moreover, the study of the graph obtained allows the definition of all the assembly sequences for the product. Finally, it is possible to analyse the sequences found to select the optimal sequence.

Research limitations/implications

The major limitation of the approach is, actually, the great number of impossible sequences that are extracted. For this, a little intervention by the user is required.

Practical implications

The application of the method allows the manufacturer to analyze and study the optimal assembly sequence without the direct use of a CAD system. The approach could be used at the early stage of the design process and by means of the database of the PDM/PLM systems.

Originality/value

The approach proposed in the paper is an original method to extract a liaison graph from a 3D CAD model. The approach to extract the assembly sequences was compared with other methods and good results have been obtained.

Details

Assembly Automation, vol. 32 no. 4
Type: Research Article
ISSN: 0144-5154

Keywords

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