Search results

The purpose of this paper is to enhance sealing and rotordynamic performance of hole-pattern damping seal (HPDS) and labyrinth seal (LS) by structural innovation and geometrical optimization of special-shaped hole or annular-groove cavity.

The unsteady flow was transformed into steady one using moving reference frame method. The full period numerical models of LS and HPDS were established. The influence of special-shaped hole or annular-groove cavity at axial inclined angle on leakage rate and rotordynamic coefficient of these two seals at different whirl angular speed were investigated.

The results show that dynamic characteristics of straight-tooth LS are better than that of slanted-tooth LS. Compared to typical straight-hole damping seal, HPDS with windward oblique-hole when axial inclined angle ranges from 50 to 60° has superiority in both leakage and rotordynamic characteristics by considering smaller cross-coupled stiffness coefficient and whirl frequency ratio, larger direct damping coefficient and effective damping coefficient.

A novel HPDS with special-shaped three-dimensional hole cavity was proposed to enhance leakage and rotordynamic performance. The optimized geometrical structures of HPDS for excellent sealing and rotordynamic characteristics were obtained.

The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-07-2020-0262/

The fast and easy generation of personalized mannequin is the premise for the accurate 3D measurement for the customers in an electronic made to measure (e_MTM) system. The purpose of this paper is to attempt to propose a new virtual human mannequin modeling technique to meet this requirement.

The customized human mannequin is constructed by assemblage of the body parts. The body parts including bust, waist and hip segments are achieved by modification of the standard body section templates, while the silhouette obtained from the front and side photos are used to confine the distortion of the parts.

The main findings are the section template base and assemblage method for mannequin modeling.

The proposed method can free the burden of high cost and inconvenience of 3D scanner in the measurement process of e_MTM system, and in the mean time without loss of measurement accuracy.

The New York Times has suggested replacing sustainable fashion with responsible fashion, emphasizing the need for joint efforts by both individual consumers and retailers to take responsibility for their own decisions and actions. This study seeks to investigate the mechanism that activates individuals' personal social responsibility (PSR) and its association with their perceived corporate social responsibility (CSR) from a responsible luxury fashion retailer.

An online experiment was conducted with a nationwide US sample of luxury consumers who were randomly assigned to either individuation or deindividuation groups. Covariance-based structural equation modeling (CB-SEM) and multi-group SEM were employed to test the hypotheses.

Individuals' universalism positively affected PSR, which then enhanced their recognition of a responsible luxury retailer’s CSR and led to a greater willingness to pay a premium. More importantly, the positive effect of universalism on PSR was strengthened when consumers’ unique individuality, rather than their deindividuated state, was emphasized. Moreover, the moderating effect of individuation was indirectly transmitted through PSR to perceived CSR, hence reinforcing the relationship between PSR and CSR.

This study significantly advances existing scholarship on sustainable luxury retailing and adds rigor to deindividuation theory by demonstrating the central role of PSR and the moderating effect of individuation in enhancing recognition of a luxury fashion retailer’s CSR commitments. The findings provide luxury fashion retailers with communication and marketing strategies that highlight consumers' unique individuality to more effectively activate their sense of personal responsibility and thereby increase their recognition of the retailer’s CSR.

Luxury brands struggle to communicate their sustainability commitments to consumers due to the perceived incongruence between “luxury” and “sustainability”. This study aims to provide luxury brands with insights on how to engage consumers with different social value orientations (SVOs) to make sustainable luxury purchases in a compatible manner. It investigates the relationships between personal values (symbolism/universalism), SVOs (pro-self/prosocial orientation) and behavioral intentions toward sustainable luxury brands. It further explores whether these relationships may differ when consumers view themselves as individuals (salient personal identity is activated) versus group members (salient social identity is activated).

Study 1 (N = 419) used an online experiment in which participants were randomly assigned to either salient personal or social identity conditions to test the proposed model. Study 2 (N = 438) used a fictional brand to further validate the findings. Hypotheses were tested using covariance-based structural equation modeling (CB-SEM) and multi-group SEM.

Results indicate that prosocial orientation significantly increases consumers’ behavioral intentions toward sustainable luxury brands. Interestingly, pro-self-orientation can also drive intentions to support sustainable luxury brands when consumers’ personal identity is salient. Salient social identity can further strengthen the relationship between prosocial orientation and sustainable luxury behavioral intentions.

This study presents a novel, inclusive definition of sustainable luxury brands and adds theoretical rigor to the SVO framework by revealing the moderating role of salient identities, contributing to the body of knowledge in luxury brand research.

Merely being known as a highly ethical or strong performer cannot shield a company from every kind of crisis. From product failures to environmental and social issues, a brand’s ability to manage crises and rapidly regain consumer trust is essential. This study aims to explore whether consumer perceptions of a brands’ prior commitments to two different areas of corporate responsibility (social and product responsibility) alleviate the postcrisis attribution of accountability and further build brand resilience, examining differences between two types of crisis situations – values versus performance crises.

A scenario-based online survey on product versus ethical labor issues was conducted. The data were collected from a highly valid, nationwide sample set of more than a thousand US consumers. Multigroup structural equation modeling was used as the primary data analysis method.

A brand’s precrisis commitment to social responsibility was found to decrease attribution of accountability across both types of crises. It also strengthened brand resilience, but this effect was more prevalent in a performance than a values crisis. The effects of precrisis commitment to product responsibility on brand resilience were minimal or insignificant across crisis types.

Previous research underexplores which types of corporate responsibility commitments provide a firm with a better protection against crises. This study significantly advances the knowledge regarding the type of commitments that can substantially increase brand resilience, which supports the rationale of making stronger commitments to social responsibility than to product responsibility. Practical insights are provided into how investments in corporate social responsibility help alleviate consumers’ negative perceptions during the outbreak of a brand crisis and build more brand muscle that enables resilience against future crises.

This paper aims to provide a 3D finite element (FE) model for dynamic simulation of cutterhead and soil interaction in slurry shield tunneling.

Dynamic numerical simulation of excavation process is realized by combined use of submodeling method and arbitrary Lagrangian Eulerian (ALE) approach. The model size reduction, soil mesh refinement and stress state initialization are fulfilled by submodeling. The large soil deformations, failures and flows are handled by ALE approach. Computation time is reduced by parallel domain decomposition with recursive coordinate bisection method. Validation of the proposed approach is achieved by comparing the numerical results with monitored data from the model test for Yangtze River tunneling project.

The proposed approach proves to be an effective technique to simulate the cutterhead and soil interaction dynamically in tunnel excavation. Comparative study on the effect of mesh density indicates the requirement of relative mesh refinement. Exploration of the parallel computing performance points out the best decomposed domain for the simulation. Parametric study on the effect of rotary speed and investigation on soil properties presents the significant factors for torque.

The proposed numerical model can help in the development process of reduced‐scale model test, as well as design and selection of slurry shield machines.

The originality comes from the need to evaluate the excavation performance of slurry shield machine in tunneling project. This contribution provides a 3D numerical approach, which takes into account the stress state in soil and dynamic contact effects between soil and cutterhead. In this work, large deformation in soil is handled. Besides, soil failures and flows are captured.

Aiming at improving the mechanical efficiency, the applicability and the working life of high water-based hydraulic motor (HWBHM) under working conditions at low speed and high pressure, the friction performance of different matching materials for piston slipper – crankshaft pair with high water-based hydraulic fluid (HWBHF) under working conditions at low speed and high pressure – were studied.

The friction experiments for different materials (316L, 316L with surface coating OVINO – tetrahedral amorphous carbon [TAC; 316L-TAC] – 316L with surface coating OVINO-graphite intercalated compound [GIC; 316L-GIC] and polyetheretherketone [PEEK] reinforced with 30 per cent carbon fiber [PEEK-30CF]) under HWBHF lubrication were implemented on a pin-disk friction abrasion machine to determine the variations of coefficient of friction (CoF) and wear rate for each matching materials. In addition, the roughness and the morphology of worn surface of different matching materials were quantitatively characterized.

The study revealed that material combinations have different friction performances. Test results showed that the abrasion of matching type stainless steel (SS) and SS is rather serious, and the method of surface coating could improve the friction performance of SS when friction with other materials. For matching type of SS with surface treatment (SS-ST) and SS-ST, 316L-GIC and 316L-GIC have relatively stable CoF, and the wear rate was smaller than other matching materials, while 316L-TAC and 316L-TAC has the smaller CoF than that of 316L-GIC. Matching materials 316L-GIC with PEEK-30CF of matching type SS-ST and PEEK-30CF has more stable COF and better wear resistance than those of other matching materials.

This research has laid a foundation for the improvement of service life and working efficiency of friction pair in HWBHM under working conditions at low speed and high pressure.

This study aims to explore how professional event associations’ recovery strategies are perceived by members and to measure the consequent influence of the perceived fit of recovery strategies on organizational identification (OI), consistent behavioral intentions and long-term commitment intentions.

Data were collected from current members of professional event management associations who work not only as event planners but also as service providers in the hospitality and tourism industry. The authors used partial least squares structural equation modeling to test the proposed model.

The perceived fit between recovery strategy and internal domains, the self in particular, was found to be the most important in exerting effects directly on OI, and its indirect effects are significant on all the behavioral intentions toward the association, while the perceived fit of recovery strategy with external domains, especially the industry, was not significant with any of the other factors.

The findings from the present study provide professional event association leaderships with significant managerial implications in establishing a sustainable business model to retain current members and increase their intentions toward consistent engagement and long-term commitment.

Stepping forward from the strategic management and organizational behavior literature in the private sector, the authors shed light on a crisis recovery mechanism of professional associations in the event industry, to the best of the authors’ knowledge, the first such attempt in the event management literature.

The People’s Republic of China, as a progressively developing economy, is subject to dynamic structural changes, which are potentially de‐stabilizing in nature. Since the end of the 1970s China had abandoned Mao Zedong’s socioeconomic theories and policies and instituted profound socioeconomic reforms. Her more pragmatic approach has increasingly emphasized economic freedom and individualism. The pursued “pragmatism” involves a revolutionary mixture of both a planned and a market economy with greater economic but not political freedom. Essential socioeconomic reforms were not complemented by requisite political reforms. According to Walter Eucken’s “instability thesis,” this may de‐stabilize China’s socioeconomic and political structures. The challenge which China continues to face is how to reconcile two sets of conflicting principles, economic freedom and Marxist‐Leninist‐Maoist control of politics and society, resolving Eucken’s hypothesis of potential long‐term instability. This paper addresses this challenge in terms of ethical and economic perspectives.