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11 – 20 of over 21000Parthasarathi N. and Satyanarayanan K.S.
Technological innovations in the construction field correspond to a wider revolution in metropolitan life and in structural design. With the demand for advanced concrete…
Abstract
Purpose
Technological innovations in the construction field correspond to a wider revolution in metropolitan life and in structural design. With the demand for advanced concrete technology, the introduction of new reinforced materials in concrete, namely, iron, steel and other reinforcing elements. Reinforcement in concrete is developed in the centuries back and several advancements are being stirred to improvise the properties of the concrete through reinforcements. On the basis of this finding from the earlier research studies, a reinforcement methodology is practiced on the current study to investigate the deflection of the M30 mix concrete frame under thermal load conditions.
Design/methodology/approach
For the examination, corner and the middle frame are considered with the reinforcement provided on four zones with 16-mm diameter for compression and 8-mm diameter is used for the stirrup at 150 mm c/c spacing. The load is applied to the column with live and wall load of 3.5 kN/m and 14.7KN/m. The experimentation is carried out by the finite element analysis strategy in ABAQUS simulation software with five test conditions with the bare frame at single, two and three-bay infill. The model of the frame is developed and meshed with the meshing type of C3D8T under 8-node thermally coupled brick mesh type for the mesh size of 25 mm.
Findings
From the simulation outcome, the effect of thermal gradient on the reinforced concrete is analyzed and its structural properties are plotted as performance graphs in the result section.
Originality/value
Under the thermal load condition, the model is simulated for 180 min for five different cases and analyzed the deflection parameters such as deformation, stress and failure rate.
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Guangwei Liang, Zhiming Gao, Cheng-Man Deng and Wenbin Hu
The purpose of this study is to reveal the effect of nano-Al2O3 particle addition on the nucleation/growth kinetics, microhardness, wear resistance and corrosion resistance of…
Abstract
Purpose
The purpose of this study is to reveal the effect of nano-Al2O3 particle addition on the nucleation/growth kinetics, microhardness, wear resistance and corrosion resistance of Co–P–xAl2O3 nanocomposite plating.
Design/methodology/approach
The kinetics and properties of Co–P–xAl2O3 nanocomposite plating prepared by electroplating were investigated by electrochemical measurements, scanning electron microscopy, X-ray diffraction, X-ray photoelectron spectroscopy, Vickers microhardness measurement, SRV5 friction and wear tester and atomic force microscopy.
Findings
A 12 g/L nano-Al2O3 addition in the plating solution can transform the nucleation/growth kinetics of the plating from the 3D progressive model to the 3D instantaneous model. The microhardness of the plating increased with the increase of nano-Al2O3 content in plating. The wear resistance of the plating did not adhere strictly to Archard’s law. An even and denser corrosion product film was generated due to the finer grains, with a high corrosion resistance.
Originality/value
The effect of different nano-Al2O3 addition on the nucleation/growth kinetics and properties of Co–P–xAl2O3 nanocomposite plating was investigated, and an anticorrosion mechanism of Co–P–xAl2O3 nanocomposite plating was proposed.
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Fábio Monteiro Conde, Pedro Gonçalves Coelho, Rodrigo Paiva Tavares, Pedro Castro Camanho, José Miranda Guedes and Helder Carriço Rodrigues
This study aims to achieve a “pseudo-ductile” behaviour in the response of hybrid fibre reinforced composites under uniaxial traction by solving properly formulated optimization…
Abstract
Purpose
This study aims to achieve a “pseudo-ductile” behaviour in the response of hybrid fibre reinforced composites under uniaxial traction by solving properly formulated optimization problems.
Design/methodology/approach
The composite material model is based on the combination of different types of fibres (with different failure strains or strengths) embedded in a polymer matrix. The composite failure under tensile load is predicted by analytical models. An optimization problem formulation is proposed and a Genetic Algorithm is used. Multi-objective optimization problems balancing failure strength and ductility criteria are solved providing optimal mixtures of fibres whose properties may come either from a pre-defined list of materials, currently available in the market, or simply assuming their continuum variation within predefined bounds, in an attempt to attain unprecedented performance levels.
Findings
Optimal solutions of hybrid fibre reinforced composites exhibiting pseudo-ductile behaviour are presented. It is found that a fibre made from a material exhibiting relatively low stiffness combined with high strength is preferred for hybridization. Furthermore, the ratio of the average failure/critical strains between the low and high elongation fibres to be hybridized must be equal or greater than two.
Originality/value
Typically, a ductile failure is an inherent property of metals, that is, their typical response curve after the linear (elastic) region exhibits a yielding plateau still followed by an increase in stress till collapse. In stark contrast, composite materials exhibit (under some loading conditions) brittle failure that may limit their widespread usage. Therefore, a “pseudo-ductility” in composites is valued and targeted through optimization which is the main original contribution here.
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The purpose of this paper is to understand the alignment of assessment processes in libraries and develop a conceptual model of aligning library performance assessment for…
Abstract
Purpose
The purpose of this paper is to understand the alignment of assessment processes in libraries and develop a conceptual model of aligning library performance assessment for effective reporting of library value and performance to stakeholders.
Design/methodology/approach
The paper reviews of library performance assessment literature and current practice research to identify the need and value of aligned performance assessment processes for libraries, the primary contributing alignment factors affecting the library assessment process, and potential benefits of improved alignment of the assessment process for libraries.
Findings
Libraries can improve the reporting and value of their assessment processes by improving the alignment of their assessment processes in two ways: internally through the use of consistent and innovative processes, metrics, and culture within the library and externally by embracing the alignment factors of the library's service environment. The library must develop more effective assessment alignment processes by progressively elevating the alignment of the library's assessment processes from internal non‐alignment of assessment to the total alignment of assessment to the library’ service environment and the dynamic environmental factors driving today's libraries.
Practical implications
Increasing the alignment of a library's assessment processes can improve the efficiency of assessment processes, the effectiveness of the results of the assessment processes, and the library stakeholder's appreciation and understanding of the results of the assessment processes.
Originality/value
Provides a conceptual model applicable to all types of libraries to increase the alignment of assessment and the library's ability to report value and impact.
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Babruvahan Pandurang Ronge and Prashant Maruti Pawar
– This paper aims to focus on the stochastic analysis of composite rotor blades with matrix cracking in forward flight condition.
Abstract
Purpose
This paper aims to focus on the stochastic analysis of composite rotor blades with matrix cracking in forward flight condition.
Design/methodology/approach
The effect of matrix cracking and uncertainties are introduced to the aeroelastic analysis through the cross-sectional stiffness properties obtained using thin-walled beam formulation, which is based on a mixed force and a displacement method. Forward flight analysis is carried out using an aeroelastic analysis methodology developed for composite rotor blades based on the finite element method in space and time. The effects of matrix cracking are introduced through the changes in the extension, extension-bending and bending matrices of composites, whereas the effect of uncertainties are introduced through the stochastic properties obtained from previous experimental and analytical studies.
Findings
The stochastic behavior of helicopter hub loads, blade root forces and blade tip responses are obtained for different crack densities. Further, assuming the behavior of progressive damage in same beam is measurable as compared to its undamaged state, the stochastic behaviors of delta values of various measurements are studied. From the stochastic analysis of forward flight behavior of composite rotor blades at various matrix cracking levels, it is observed that the histograms of these behaviors get mixed due to uncertainties. This analysis brings out the parameters which can be used for effective prediction of matrix cracking level under various uncertainties.
Practical implications
The behavior is useful for the development of a realistic online matrix crack prediction system.
Originality/value
Instead of introducing the white noise in the simulated data for testing the robustness of damage prediction algorithm, a systematic approach is developed to model uncertainties along with damage in forward flight simulation.
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Many Ukrainian firms experience managerial difficulties due to a lack of qualified managers. This shortage of managerial talent affects many firms, regardless of their size and…
Abstract
Many Ukrainian firms experience managerial difficulties due to a lack of qualified managers. This shortage of managerial talent affects many firms, regardless of their size and origin. To solve this problem, small/entrepreneurial firms as well as medium‐size firms rely mainly on their own managerial talents, while larger organizations turn to consulting management. Consulting management in the Ukraine is still in its infancy and suffers from a lack of managerial and restructuring experience in a free‐market economy. This paper explains an organizational improvement model developed based on a small advertising agency that could be generalized for use by other firms.
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Raquel Ottoboni Pavan, Marco Antonio Ferreira, Nelson Oliveira Stefanelli and Gislaine Camila Lapasini Leal
This research analyzes the current knowledge regarding the use of maturity models (MMs) in SSCM, aiming to identify the main characteristics, trends and research gaps on the…
Abstract
Purpose
This research analyzes the current knowledge regarding the use of maturity models (MMs) in SSCM, aiming to identify the main characteristics, trends and research gaps on the subject. Facing the growing interest in carrying out studies directed at sustainability, to the detriment of more prescient environmental and social impacts and the need to consolidate the concepts present in the literature regarding the SSCM, an absence of similar studies in the current literature was found. The authors have selected articles to compose a database that allows users to analyze and classify publications on MMs in SSCM, being those subdivided into 7 categories: focus, methodology, analyzed sector, sustainable practices, dimensions of sustainable development, type of MM and model/framework validation method.
Design/methodology/approach
To achieve this purpose, a literature systematization was conducted by searching publications using defined keywords in two databases and following a process of classification. The systematic process has five steps, from the selection of databases to the filtering of publications, review of information and analysis of the sample.
Findings
The topic under study is promising, with a few publications dealing with it, mainly in Brazil, and there is a trend to exploit more of the area in future research.
Originality/value
This research provides a detailed analysis of an emerging theme, divided into seven thematic categories. Results demonstrate that the topic is still underexplored, indicating an important research gap to be filled.
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Jacqueline Manuel and Don Carter
This paper provides a critical interpretative analysis of the first secondary English syllabus for schools in New South Wales (NSW), Australia, contained within the Courses for…
Abstract
Purpose
This paper provides a critical interpretative analysis of the first secondary English syllabus for schools in New South Wales (NSW), Australia, contained within the Courses for Study for High Schools (New South Wales Department of Public Instruction, 1911). The purpose of the paper is to examine the “continuities that link English curriculum discourses and practices with previous discourses and practices” in the rhetorical curriculum. The analysis identifies those aspects of the 1911 English syllabus that have since become normative and challenges the appropriateness of certain enduring orthodoxies in a twenty-first century context.
Design/methodology/approach
Focussing on a landmark historical curriculum document from 1911, this paper draws on methods of historical comparative and documentary analysis. It sits within the tradition of historical curriculum research that critiques curriculum documents as a primary source for understanding continuities of discourses and practices. A social constructionist approach informs the analysis.
Findings
The conceptualisation of subject English evident in the structure, content and emphases of the 1911 English syllabus encodes a range of “discourses and practices” that have in some form endured or been “reconstituted and remade” (Cormack, 2008, p. 275) over the course of a century. The analysis draws attention to those aspects of the subject that have remained unproblematised and taken-for-granted, and the implications of this for universal student participation and attainment.
Originality/value
This paper reorients critical attention to a significant historical curriculum document that has not, to date, been explored against the backdrop twenty-first century senior secondary English curriculum. In doing so, it presents extended insights into a range of now normative structures, beliefs, ideas, assumptions and practices and questions the potential impact of these on student learning, access and achievement in senior secondary English in NSW in the twenty-first century.
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Mica Grujicic, Jennifer Snipes, S. Ramaswami and Fadi Abu-Farha
The purpose of this paper is to propose a computational approach in order to help establish the effect of various self-piercing rivet (SPR) process and material parameters on the…
Abstract
Purpose
The purpose of this paper is to propose a computational approach in order to help establish the effect of various self-piercing rivet (SPR) process and material parameters on the quality and the mechanical performance of the resulting SPR joints.
Design/methodology/approach
Toward that end, a sequence of three distinct computational analyses is developed. These analyses include: (a) finite-element modeling and simulations of the SPR process; (b) determination of the mechanical properties of the resulting SPR joints through the use of three-dimensional, continuum finite-element-based numerical simulations of various mechanical tests performed on the SPR joints; and (c) determination, parameterization and validation of the constitutive relations for the simplified SPR connectors, using the results obtained in (b) and the available experimental results. The availability of such connectors is mandatory in large-scale computational analyses of whole-vehicle crash or even in simulations of vehicle component manufacturing, e.g. car-body electro-coat paint-baking process. In such simulations, explicit three-dimensional representation of all SPR joints is associated with a prohibitive computational cost.
Findings
It is found that the approach developed in the present work can be used, within an engineering optimization procedure, to adjust the SPR process and material parameters (design variables) in order to obtain a desired combination of the SPR-joint mechanical properties (objective function).
Originality/value
To the authors’ knowledge, the present work is the first public-domain report of the comprehensive modeling and simulations including: self-piercing process; virtual mechanical testing of the SPR joints; and derivation of the constitutive relations for the SPR connector elements.
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This article appraises the dynamics of development at the mid‐point in the evolution of the corporate university paradigm in a large public company. It presents a summary of the…
Abstract
This article appraises the dynamics of development at the mid‐point in the evolution of the corporate university paradigm in a large public company. It presents a summary of the key research findings that have been derived from a detailed cross section analysis of the developments to date. The methodology for the analysis is based upon a progressive process model that highlights the developmental status of the main corporate university decision strands that are essential for success. The author concludes from the research findings and considers the state of organisational readiness in the company to move further ahead into a comprehensive and viable manifestation of the corporate university concept.
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