Guocheng Lv, Dawei Jia, Changyou Li, Chunyu Zhao, Xiulu Zhang, Feng Yan, Hongzhuang Zhang and Bing Li
This study aims to investigate the effect of countersunk rivet head dimensions on the fatigue performance of the riveted specimens of 2024-T3 alloy.
Abstract
Purpose
This study aims to investigate the effect of countersunk rivet head dimensions on the fatigue performance of the riveted specimens of 2024-T3 alloy.
Design/methodology/approach
The relationship between rivet head dimensions and fatigue behavior was investigated by finite element method and fatigue test. The fatigue fracture of the specimens was analyzed by scanning electron microscopy.
Findings
A change of the rivet head dimensions will cause a change in the stress concentration and residual normal stress, the stress concentration near the rivet hole causes the fatigue crack source to be located on the straight section of the countersunk rivet hole and the residual normal stress can effectively restrain the initiation and expansion of fatigue cracks. The fatigue cycle will cause the rivet holes to produce different degrees of surface wear.
Originality/value
The fatigue life of the specimens with the height of the rivet head of 2.28 mm and 2.00 mm are similar, but the specimens with the height of the rivet head of 1.72 mm were far higher than the other specimens.
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Kenneth Shiu Pong Ng, Yan Feng, Ivan Ka Wai Lai and Lois Zi-Yu Yang
This study aims to develop a conceptual model to understand how customer knowledge management (CKM) affects fitness club membership renewal through the mediation of relationship…
Abstract
Purpose
This study aims to develop a conceptual model to understand how customer knowledge management (CKM) affects fitness club membership renewal through the mediation of relationship quality.
Design/methodology/approach
Data were collected outside of fitness clubs using a systematic sampling method. A total of 224 valid responses were collected. Structural equation modelling was used to evaluate the relationship between the constructs of the research model.
Findings
The results indicate that both knowledge from customers and knowledge for customers have a positive influence on customer satisfaction and customer trust. Among them, knowledge for customers has a stronger influence on customer satisfaction while knowledge from customers has a greater influence on customer trust. Additionally, three dimensions of relationship quality (customer satisfaction, customer trust and customer commitment) positively influence membership renewal intention with customer commitment exhibiting the greatest influence on it.
Originality/value
This study combines the theories of CKM and relationship quality management to explain why members will renew their service contracts. By using fitness clubs as an example, this research extends the authors' understanding of how knowledge from and for customers can influence customers' attitudes and behavioural intentions towards service companies.
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Xiaoqing Zhang, Genliang Xiong, Peng Yin, Yanfeng Gao and Yan Feng
To ensure the motion attitude and stable contact force of massage robot working on unknown human tissue environment, this study aims to propose a robotic system for autonomous…
Abstract
Purpose
To ensure the motion attitude and stable contact force of massage robot working on unknown human tissue environment, this study aims to propose a robotic system for autonomous massage path planning and stable interaction control.
Design/methodology/approach
First, back region extraction and acupoint recognition based on deep learning is proposed, which provides a basis for determining the working area and path points of the robot. Second, to realize the standard approach and movement trajectory of the expert massage, 3D reconstruction and path planning of the massage area are performed, and normal vectors are calculated to control the normal orientation of robot-end. Finally, to cope with the soft and hard changes of human tissue state and body movement, an adaptive force tracking control strategy is presented to compensate the uncertainty of environmental position and tissue hardness online.
Findings
Improved network model can accomplish the acupoint recognition task with a large accuracy and integrate the point cloud to generate massage trajectories adapted to the shape of the human body. Experimental results show that the adaptive force tracking control can obtain a relatively smooth force, and the error is basically within ± 0.2 N during the online experiment.
Originality/value
This paper incorporates deep learning, 3D reconstruction and impedance control, the robot can understand the shape features of the massage area and adapt its planning massage path to carry out a stable and safe force tracking control during dynamic robot–human contact.
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Jun Wu, Hong-Zhong Huang, Yan-Feng Li, Song Bai and Ao-Di Yu
Aero-engine components endure combined high and low cycle fatigue (CCF) loading during service, which has attracted more research attention in recent years. This study aims to…
Abstract
Purpose
Aero-engine components endure combined high and low cycle fatigue (CCF) loading during service, which has attracted more research attention in recent years. This study aims to construct a new framework for the prediction of probabilistic fatigue life and reliability evaluation of an aero-engine turbine shaft under CCF loading if considering the material uncertainty.
Design/methodology/approach
To study the CCF failure of the aero-engine turbine shaft, a CCF test is carried out. An improved damage accumulation model is first introduced to predict the CCF life and present high prediction accuracy in the CCF loading situation based on the test. Then, the probabilistic fatigue life of the turbine shaft is predicted based on the finite element analysis and Monte Carlo analysis, where the material uncertainty is taken into account. At last, the reliability evaluation of the turbine shaft is conducted by stress-strength interference models based on an improved damage accumulation model.
Findings
The results indicate that predictions agree well with the tested data. The improved damage accumulation model can accurately predict the CCF life because of interaction damage between low cycle fatigue loading and high cycle fatigue loading. As a result, a framework is available for accurate probabilistic fatigue life prediction and reliability evaluation.
Practical implications
The proposed framework and the presented testing in this study show high efficiency on probabilistic CCF fatigue life prediction and can provide technical support for fatigue optimization of the turbine shaft.
Originality/value
The novelty of this work is that CCF loading and material uncertainty are considered in probabilistic fatigue life prediction.
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Qianling Jiang, Chao Gu, Yan Feng, Wei Wei and Wang-Chin Tsai
Mobile e-commerce has brought convenience to consumers. But for goods such as shoes, mobile e-commerce has failed to provide the same experience as consumers would have in…
Abstract
Purpose
Mobile e-commerce has brought convenience to consumers. But for goods such as shoes, mobile e-commerce has failed to provide the same experience as consumers would have in physical stores, and that also causes problems for online merchants, such as high return rates. As a result, the augmented reality (AR) virtual shoe-try-on function appeared. The way that AR virtual shoe-try-on study different from other AR virtual try-on studies is that AR virtual shoe-try-on study only satisfies consumers' visual experience and consumers cannot judge whether the shoes are comfort or not. Whether consumers would accept AR virtual try-on function to help them make purchase decision due to the visual experience provided by AR virtual try-on function is worth discussion. Measuring users' perceptions and preferences can help companies design AR shoe-trying functions and provide services more cost-effectively.
Design/methodology/approach
To promote the continuous use and better development of such mobile e-commerce based on the technology acceptance model (TAM), this study explored the influencing factors for users' intentions to continue using the AR virtual shoe-try-on function, including the perceived usefulness, perceived ease of use, system quality, perceived playfulness and attitude.
Findings
The results of this study showed that TAM is a powerful theoretical tool of the new technology in mobile e-commerce and that the system quality and perceived playfulness also have a positive impact on the original variables of TAM. System quality and perceived playfulness are important predictors of users' continuance intentions to use the AR virtual shoe-try-on function.
Originality/value
The main contribution of this study to model iteration and theoretical update is to verify the applicability of the TAM in the AR shoe-try-on function and to expand TAM model with system quality and perceived playfulness. The authors' results will help shoe enterprises win users' recognition through AR shoe-try-on function and improve users' continuance intention of use.
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Yan Feng, Jia Lu and Yeujun Yoon
Experiences of high quality games between top-class sports teams could influence sports fans’ decision to attend the domestic sports games. For example, soccer fans who watched…
Abstract
Purpose
Experiences of high quality games between top-class sports teams could influence sports fans’ decision to attend the domestic sports games. For example, soccer fans who watched the World Cup games between the best national teams are likely to be disappointed with the performance of their domestic league teams after the World Cup event, while more people might be attracted to watch a soccer game because of their increased interest in soccer games. The purpose of this paper is to investigate how the international sports event (i.e. the World Cup) influences the demand of the domestic sports league games in the non-hosting country.
Design/methodology/approach
To test these antithetical hypotheses, the authors collect the Chinese Super League game-level data from 2004 to 2011. For analysis, the authors propose two empirical models rigorously developed based on previous sports marketing theories.
Findings
The findings are surprising compared to previous studies for the hosting countries or countries that performed spectacularly during the World Cup tournaments. The authors find that the international event negatively influences the attendance of domestic games. Specifically, it gives salience to the competitive quality of a match and helps enhance the impact of star players. Furthermore, the authors find evidence of dynamic effects of the international event.
Originality/value
The study contributes to the previous sports literatures by expanding our understanding of the effect of international sports events. Particularly, the results shed light on international events’ impact on the domestic sports league demand in more general conditions based on its influence on people’s behavior, rather than focusing on the effect caused by facility development or dramatic performance during the international event.
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Abstract
Purpose
The paper aims to reduce the low-frequency resonance and residual vibration of the robot during the operation, improve the working accuracy and efficiency. A reduced weight and large load-to-weight ratio can improve the practical application of a collaborative robot. However, flexibility caused by the reduced weight and large load-to-weight ratio leads to low-frequency resonance and residual vibration during the operation of the robot, which reduces the working accuracy and efficiency. The vibrations of the collaborative robot are suppressed using a modified trajectory-planning method.
Design/methodology/approach
A rigid-flexible coupling dynamics model of the collaborative robot is established using the finite element and Lagrange methods, and the vibration equation of the robot is derived. Trajectory planning is performed with the excitation force as the optimization objective, and the trajectory planning method is modified to reduce the vibration of the collaborative robot and ensure the precision of the robot terminal.
Findings
The vibration amplitude is reduced by 80%. The maximum torque amplitude of the joint before the vibration suppression reaches 50 N·m. After vibration suppression, the maximum torque amplitude of the joint is 10 N·m, and the resonance phenomenon is eliminated during the operation process. Consequently, the effectiveness of the modified trajectory planning method is verified, where the vibration and residual vibration in the movement of the collaborative robot are significantly reduced, and the positioning accuracy and working efficiency of the robot are improved.
Originality/value
This method can greatly reduce the vibration and residual vibration of the collaborative robot, improve the positioning accuracy and work efficiency and promote the rapid application and development of collaborative robots in the industrial and service fields.
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Yan Feng, Xiaolian Chen and Ivan Lai
B&B stays have enjoyed popularity in China over recent decades. This study examines the impacts of the three dimensions of tourist experiential quality on the perceived functional…
Abstract
Purpose
B&B stays have enjoyed popularity in China over recent decades. This study examines the impacts of the three dimensions of tourist experiential quality on the perceived functional and emotional value and customer satisfaction with B&B stays in Southwestern China.
Design/methodology/approach
Questionnaires were collected from 433 Chinese visitors in Southwestern China. Partial least squares–structural equation modeling (PLS-SEM) was used to test the significance of the relationship that exists among experiential quality, perceived value and tourist satisfaction.
Findings
The research results proved that experiential quality predicts customer satisfaction with B&B stays as mediated by perceived functional and emotional values. The specific experiential quality - fun – has the strongest effect on both perceived functional value and emotional value between the three dimensions of experiential quality.
Research limitations/implications
Since fun is viewed as the most significant element, B&B providers should consider creating a more joyful encounter for tourists. They should enrich the activities and improve service to strengthen the experiential quality perceived by the tourists. Both relational experiences and authentic local experiences should be incorporated into the activities and services provided.
Originality/value
This is likely to be the first study to investigate the influence of three dimensions of experiential quality on perceived functional and emotional value and satisfaction from the B&B industry in China. The findings provide value through actionable insights into experiential qualities, functional and emotional values that drive tourist satisfaction.
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Rita Yi Man Li, Li Meng, Tat Ho Leung, Jian Zuo, Beiqi Tang and Yuan Wang
The circular economy (CE) proposes that all materials flow in a close-looped system. Waste generated by one production stage may be useful in another. Thus, the idea of a CE is…
Abstract
The circular economy (CE) proposes that all materials flow in a close-looped system. Waste generated by one production stage may be useful in another. Thus, the idea of a CE is linked to the goal of zero waste (ZW) and promotes a range of sustainable economic, social and environmental benefits in each sector. When we apply this to construction waste management, waste can be managed through reducing, recycling, upcycling and reusing. However, there is an inevitable cost implication associated with this process due to the additional requirement of inventory and waste processing, and this becomes a disincentive to implementing the CE. Formal institutions, referring here to legal rules and regulations, play a critical role in motivating firms and individuals towards a CE. As different countries have different government rules and regulations, and there is limited research on their differences, we review Asia’s and Europe’s legal rules and regulations relevant to the goal of ZW and CE in the construction sector.
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Feng Shui (pronounced “fung shui”) means literally wind and water and is atype of geomancy or divination from nature. It originated in China, andrelates to nature and the position…
Abstract
Feng Shui (pronounced “fung shui”) means literally wind and water and is a type of geomancy or divination from nature. It originated in China, and relates to nature and the position of man and of buildings within it. Many hotels and restaurants in the Asia‐Pacific region have been specifically designed using feng shui principles, and recently Hilton International hotels used this as the focus of their advertising campaign. Discusses the origins of feng shui, and its impact on the location, design, layout, fixture and fittings and marketing of hotels and restaurants.