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1 – 10 of over 1000
Article
Publication date: 16 May 2022

Heng Xiao, Zi-Tao Li, Lin Zhan and Si-Yu Wang

The purpose of this study is to show how gradual strength degradation of metal beams under cyclic bending up to fatigue failure is simulated based on a new elastoplasticity model…

Abstract

Purpose

The purpose of this study is to show how gradual strength degradation of metal beams under cyclic bending up to fatigue failure is simulated based on a new elastoplasticity model free of any yield criterion.

Design/methodology/approach

A new approach is proposed toward accurately and explicitly prescribing evolution of non-uniform stress distribution on beam cross-section under cyclic bending and, as such, gradual degradation of the bending strength can be directly determined.

Findings

Explicit results for the bending response in a whole cyclic process up to fatigue failure are obtained and the fatigue characteristic curve is for the first time simulated directly between the curvature amplitude and the cycle number to failure.

Originality/value

First, explicit and accurate determination of the non-uniform stress distribution on beam cross-section is achieved with asymptotic softening effects. Second, degradation of the bending strength can be directly deduced cycle by cycle. Finally, the relationship between the bending moment and the curvature is calculated using new and efficient numerical algorithms, thus bypassing usual time-consuming calculations with finite element procedures. Numerical results are presented and in good agreement with experimental data.

Details

Multidiscipline Modeling in Materials and Structures, vol. 18 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 21 August 2020

Zi-Han Xu, Lin Zhan, Si-Yu Wang, Hui-Feng Xi and Heng Xiao

A new approach is proposed toward accurately matching any given realistic hardening and softening data from uniaxial tensile test up to failure and moreover, toward bypassing…

Abstract

Purpose

A new approach is proposed toward accurately matching any given realistic hardening and softening data from uniaxial tensile test up to failure and moreover, toward bypassing usual tedious implicit trial-and-error iterative procedures in identifying numerous unknown parameters.

Design/methodology/approach

Finite strain response features of metals with realistic hardening-to-softening transition effects up to eventual failure are studied for the first time based on the self-consistent elastoplastic J2-flow model with the logarithmic stress rate. As contrasted with usual approximate and incomplete treatments merely considering certain particular types of hardening effects such as power type hardening, here a novel and explicit approach is proposed to obtain a complete form of the plastic-work-dependent yield strength over the whole hardening and softening range.

Findings

A new multi-axial evolution equation for both hardening and softening effects is established in an explicit form. Complete results for the purpose of model validation and prediction are presented for the finite strain responses of monotonic uniaxial stretching up to failure.

Originality/value

New finite strain elastoplastic equations are established with a new history-dependent variable equivalently in place of the usual plastic work. With these equations, a unified and accurate simulation of both gardening and softening effects up to failure is achieved for the first time in an explicit sense without involving usual tedious implicit trial-and-error iterative procedures.

Details

Multidiscipline Modeling in Materials and Structures, vol. 17 no. 3
Type: Research Article
ISSN: 1573-6105

Keywords

Article
Publication date: 10 May 2022

Zhan Wang

This paper aims to study the effects of interest on reserves (IOR) on banks’ behavior in a theoretical framework.

Abstract

Purpose

This paper aims to study the effects of interest on reserves (IOR) on banks’ behavior in a theoretical framework.

Design/methodology/approach

This paper introduces IOR into both Cooper and Ross (1998) and Cooper and Ross (2002) and conducts quantitative analysis. It thoroughly examines the effects of IOR on banks’ resource allocation decisions under different assumptions.

Findings

In the model without deposit insurance, the results of this paper show that paying IOR facilitates the bank to use the run-proof contract. When the run-admitting contract is adopted, there is a set of conditions under which the bank is indifferent between holding illiquid asset and excess liquid reserves. In the model with deposit insurance, the results show that if the riskless illiquid investment is profitable and available, then paying IOR can hardly influence the bank's resource allocation. If the riskless illiquid investment is limited, then a certain level of IOR could fulfill some monetary targets.

Originality/value

Little research has combined IOR and model of bank runs. It helps to extend the theoretical analysis in this perspective.

Details

Journal of Financial Regulation and Compliance, vol. 30 no. 4
Type: Research Article
ISSN: 1358-1988

Keywords

Article
Publication date: 3 January 2019

Zhongcheng Wei, Jingxia Zhan, Xi He and Jinjun Wang

The purpose of this paper is to mount Gurney flaps at the trailing edges of the canards and investigate their influence on aerodynamic characteristics of a simplified…

Abstract

Purpose

The purpose of this paper is to mount Gurney flaps at the trailing edges of the canards and investigate their influence on aerodynamic characteristics of a simplified canard-configuration aircraft model.

Design/methodology/approach

A force measurement experiment was conducted in a low-speed wind tunnel. Hence, the height and shape effects of the Gurney flaps on the canards were investigated.

Findings

Gurney flaps can increase the lift and pitching-up moment for the aircraft model tested, thereby increasing the lift when trimming the aircraft. The dominant parameter to influence aerodynamic characteristics is the height of Gurney flaps. When the flap heights are the same, the aerodynamic efficiency of the triangular Gurney flaps is higher than that of the rectangular ones. Moreover, the canard deflection efficiency will be reduced with Gurney flaps equipped, but the total aerodynamic increment is considerable.

Practical implications

This paper helps to solve the key technical problem of increasing take-off and landing lift coefficients, thus improving the aerodynamic performance of the canard-configuration aircraft.

Originality/value

This paper recommends to adopt triangular Gurney flaps with the height of 3 per cent chord length of the canard root (c) for engineering application.

Details

Aircraft Engineering and Aerospace Technology, vol. 91 no. 4
Type: Research Article
ISSN: 1748-8842

Keywords

Article
Publication date: 4 February 2021

Hong Li, Changhong Li and Zhan Wang

The effective transfer of knowledge within an organization is critical for its sustainable competitive advantage. Based on the norm of reciprocity, it can be concluded that…

Abstract

Purpose

The effective transfer of knowledge within an organization is critical for its sustainable competitive advantage. Based on the norm of reciprocity, it can be concluded that individuals’ primary motivation to transfer their treasured knowledge can be summarized as “trust,” that is, the individuals trust their selfless transfer behavior can be reciprocated by the recipients in the future.

Design/methodology/approach

In this study, a simulation model based on knowledge transfer behavior and reciprocal trust between individuals is built through agent-based modeling and simulation to investigate the factors that influence the efficiency of knowledge transfer within an organization.

Findings

Experiments are performed to test the impact of reciprocal trust and organizational structure on the efficiency of knowledge transfer.

Originality/value

The results indicate a significant role of key elements of reciprocal trust and organizational structure, which provides relevant practical guidance for both individuals and organization managers in the context of knowledge transfer.

Details

Journal of Business & Industrial Marketing, vol. 36 no. 8
Type: Research Article
ISSN: 0885-8624

Keywords

Open Access
Article
Publication date: 8 August 2019

Zhan Wang, Xiangzheng Deng and Gang Liu

The purpose of this paper is to show that the environmental income drives economic growth of a large open country.

1152

Abstract

Purpose

The purpose of this paper is to show that the environmental income drives economic growth of a large open country.

Design/methodology/approach

The authors detect that the relative environmental income has double effect of “conspicuous consumption” on the international renewable resource stock changes when a new social norm shapes to environmental-friendly behaviors by using normal macroeconomic approaches.

Findings

Every unit of extra demand for renewable resource consumption increases the net premium of domestic capital asset. Even if the technology spillovers are inefficient to the substitution of capital to labor force in a real business cycle, the relative income with scale effect increases drives savings to investment. In this case, the renewable resource consumption promotes both the reproduction to a higher level and saving the potential cost of environmental improvement. Even if without scale effects, the loss of technology inefficient can be compensated by net positive consumption externality for economic growth in a sustainable manner.

Research limitations/implications

It implies how to earn the environment income determines the future pathway of China’s rural conversion to the era of eco-urbanization.

Originality/value

We test the tax incidence to demonstrate an experimental taxation for environmental improvement ultimately burdens on international consumption side.

Details

Forestry Economics Review, vol. 1 no. 1
Type: Research Article
ISSN: 2631-3030

Keywords

Article
Publication date: 1 August 2003

Xiaoyong Zhan

A mathematical model and numerical method for water flow and solute transport in a tidal river network is presented. The tidal river network is defined as a system of open…

Abstract

A mathematical model and numerical method for water flow and solute transport in a tidal river network is presented. The tidal river network is defined as a system of open channels or rivers with junctions and cross sections. As an example, the Pearl River in China is represented by a network of 104 channels, 62 nodes, and a total of 330 cross sections with 11 boundary sections for one of the applications. The simulations are performed with a supercomputer for seven scenarios of water flow and/or solute transport in the Pearl River, China, with different hydrological and weather conditions. Comparisons with available data are shown. The intention of this study is to summarize previous works and to provide a useful tool for water environmental management in a tidal river network, particularly for the Pearl River, China.

Details

Engineering Computations, vol. 20 no. 5/6
Type: Research Article
ISSN: 0264-4401

Keywords

Article
Publication date: 17 June 2022

Bishakha Mazumdar, Amy Warren, Kathryne Dupré and Travor Brown

In this study the authors examine whether bridge employees tend to hold non-standard jobs, and if so, whether non-standard job choice is deliberate. Moreover, the authors examine…

Abstract

Purpose

In this study the authors examine whether bridge employees tend to hold non-standard jobs, and if so, whether non-standard job choice is deliberate. Moreover, the authors examine whether fulfillment of employment expectations affects the personal and work attitudes of bridge employees.

Design/methodology/approach

The authors' research and hypotheses are supported and developed through psychological contract theory. The authors collected data from 195 bridge employees, employed in a variety of jobs, through an online survey. Hypotheses were tested using hierarchical multiple regression.

Findings

This study suggests that some bridge employees may engage in non-standard employment deliberately. Moreover, we show that fulfillment of perceived obligation by employers (psychological contract) is associated with personal and work attitudes (life satisfaction, job satisfaction, affective commitment, normative commitment and intentions to stay) of bridge employees.

Research limitations/implications

While this study supports psychological contract theory as an important framework for understanding bridge employment, sample size, cross-sectional data and a lack of diversity in the sample limit causality, generalizability and data robustness. Future research should strive to replicate and extend the current findings.

Practical implications

The present study underlines the importance of designing jobs to meet the expectations of bridge employees. Also, it highlights the preference of bridge employees to engage in non-standard employment.

Originality/value

The authors extend bridge employment research by empirically examining the relationship between unmet employment expectations and the personal and work attitudes of bridge employees.

Article
Publication date: 4 July 2018

Bishakha Mazumdar, Amy M. Warren and Kathryne E. Dupré

Few studies aim to uniquely conceptualize the experiences of bridge employees after they enter the workforce. Supported by the psychological contract theory and the…

Abstract

Purpose

Few studies aim to uniquely conceptualize the experiences of bridge employees after they enter the workforce. Supported by the psychological contract theory and the self-determination theory, the purpose of this paper is to contribute to the understanding of the bridge employment experience by examining how the expectations of bridge employees shape their experiences.

Design/methodology/approach

This paper first reviews the extant literature on bridge employment. It then discusses the psychological contract theory and the self-determination theory, and examines the expectations of bridge employees through the theoretical perspectives of these two theories, to examine experiences in bridge employment.

Findings

Discord in the bridge employment relationship may be attributed to a lack of understanding of the implicit expectations of bridge employees. More specifically, unmet expectations may be detrimental to the bridge employment experience, and ultimately jeopardize both employer and employee outcomes.

Research limitations/implications

This paper examines expectations and experiences of bridge employees from a theoretical perspective. Theoretical tenets are utilized to analyze how and why implicit expectations may influence bridge employees in ways that result in detrimental outcomes for both employers and employees.

Practical implications

This paper sheds light on why bridge employment arrangements may result in adverse outcomes. Specifically, when there is a lack of understanding between bridge employees’ expectations and experiences, both individual and organizational outcomes may be impaired. An improved understanding of the bridge employment experience will likely result in an enhanced working relationship between bridge employees and employers, and minimize misunderstandings about this cohort of the workforce.

Originality/value

Using the guidelines of the psychological contract theory and the self-determination theory, we develop a model to examine how expectation of bridge employees may affect the experiences and ultimately, the outcomes of bridge employment. The authors also identify factors uniquely applicable to bridge employees. This is the first paper that examines the experiences of bridge employees through such theoretical perspectives.

Article
Publication date: 6 August 2019

Khaled Lahlouh, Delphine Lacaze and Richard Huaman-Ramirez

The purpose of this paper is to explore the relationship between different categories of person–environment (P–E) fit and two types of retirement intentions (i.e. full retirement…

Abstract

Purpose

The purpose of this paper is to explore the relationship between different categories of person–environment (P–E) fit and two types of retirement intentions (i.e. full retirement and bridge employment).

Design/methodology/approach

Data were collected from a convenience sample of 357 executives aged 50 and over, employed in French private sector companies. Hypotheses were tested using structural equation modeling.

Findings

Perceptions of value congruence at vocational level and needs and supplies fit at organizational and job levels were positively related to the intention to hold bridge employment after retirement. The fit between older worker’s abilities and job demands was positively related to the two types of retirement intentions.

Originality/value

The complexity of retirement transition is taken into account with the introduction of two types of retirement intentions. P–E fit is shown to be an antecedent of career intentions after retirement.

Details

Personnel Review, vol. 48 no. 6
Type: Research Article
ISSN: 0048-3486

Keywords

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