Yuquan Ni, Nannan Sun, Guixiang Zhu, Shujie Liu, Jun Liu and Guangneng Dong
This paper aims to study different morphology Cu6Sn5 effect on Babbitt alloy tribological properties.
Abstract
Purpose
This paper aims to study different morphology Cu6Sn5 effect on Babbitt alloy tribological properties.
Design/methodology/approach
Different morphology Cu6Sn5 of Babbitt was conducted by different cooling modes. Bare Babbitt was marked by Babbitt-0, Babbitt modified by first cooling mode (marked by Babbitt-1) and Babbitt modified by second cooling mode (marked by Babbitt-2). The microstructure and microhardness of specimens were tested. Then, tribological properties of Babbitt-0, Babbitt-1 and Babbitt-2 were performed by reciprocating mode under lubricated condition.
Findings
The results showed that shape Cu6Sn5 of Babbitt was changed from mixed needle and star-like shape to short rod-like or granular shape. The microhardness of Babbitt-1 was highest than that of Babbitt-0 and Babbitt-2. Compared with Babbitt-0 and Babbitt-2, tribological properties of Babbitt-1 were better under lubricated condition due to short rod-like and sparse distribution of Cu6Sn5. Moreover, the simulation result of strain and stress of Babbitt-1 was lowest than that of Babbitt-0 and Babbitt-2.
Originality/value
Different morphology (shape and distributed) of Cu6Sn5 was obtained by different cooling modes. Modulated different forms of Cu6Sn5 around SnSb was beneficial to improve Babbitt alloy tribological properties.
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Xuyang Jin, Jing Wang, Yiming Han, Nannan Sun and Jianrong Zhu
This study aims to present the discrepancy in oil film distribution in reciprocating motion experimentally with zero entraining velocity (ZEV) on a conventional ball-disk test rig…
Abstract
Purpose
This study aims to present the discrepancy in oil film distribution in reciprocating motion experimentally with zero entraining velocity (ZEV) on a conventional ball-disk test rig with oil lubrication.
Design/methodology/approach
Driven independently by two individual servomotors, a steel ball and a sapphire disc move at equal speed but in opposite directions in a triangle wave. The oil film images between the ball and the disc were recorded by a camera. After the experiments, the mid-section film thickness was evaluated by using a dichromatic interference intensity modulation approach.
Findings
The dimpled oil film in transient condition is shallower than that at steady state with the same load and velocities, and the transient dimple depth decreases with the decrease of time. The increase of the applied load offers a beneficial effect on lubrication. Boundary slippage happens in ZEV reciprocating motion. The slippage at the interface is related to the transient effect and applied load.
Originality/value
This study reveals the significant difference of the oil film variation in ZEV reciprocating motion, especially the complex boundary slippage at the interface of the oil and the sapphire disc.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-01-2020-0021
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Hongwei Tang, Jing Wang, Nannan Sun and Jianrong Zhu
The influence of the cam angular speed on the pressure, film thickness and temperature profiles at some selected angular positions together with the oil characteristics are…
Abstract
Purpose
The influence of the cam angular speed on the pressure, film thickness and temperature profiles at some selected angular positions together with the oil characteristics are investigated.
Design/methodology/approach
A high-order polynomial cam is used, and thermal elastohydrodynamic lubrication (EHL) calculations are carried out by the multi-grid method and line-line scanning technique.
Findings
It is found that the film thickness decreases with a decrease in angular speed. The depth of the dimple that occurred in the reverse motion is also reduced because of the recession in the “temperature–viscosity wedge” effect.
Originality/value
It is revealed that the reduction in the cam angular speed makes the classical big surface dimple evolve into a small centralized dimple during the opposite sliding motion.
Peer review
The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-08-2019-0327
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Xuebing Dong, Biao Wang, Yan Liu, Nannan Xi and Donghong Zhu
Utilizing the extended transportation-imagery model, this study categorizes three storytelling elements into six distinct factors – character types, influencer-character…
Abstract
Purpose
Utilizing the extended transportation-imagery model, this study categorizes three storytelling elements into six distinct factors – character types, influencer-character congruence, imaginable titles, concrete details, replication difficulty and artistic processing – to explore how these factors enhance influencer engagement.
Design/methodology/approach
This study utilized a quantitative research design, analyzing 1,660 influencer-created videos over a six-month period. Narrative elements were examined through manual coding, and their impact on live comments was assessed using negative binomial regression to identify key factors driving audience engagement.
Findings
Research results show that non-fictional characters, imaginable titles and concrete details significantly increased live comments. Conversely, high replication difficulty negatively influenced engagement. Notably, influencer-character congruence and artistic processing showed no significant effect.
Originality/value
This study advances the extended transportation-imagery model by integrating narrative elements with live comments, offering new perspectives on real-time audience engagement. The findings deepen our understanding of how storytelling techniques enhance the effectiveness of influencer marketing. From a managerial standpoint, this research provides strategic insights for influencers and brands to refine their content strategies, ultimately boosting audience engagement.
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Yanling Wang, Qin Lin, Shihan Zhang and Nannan Chen
The purpose of this study is to empirically examine the cause–effect relationships between workplace friendship and knowledge-sharing behavior, from a static perspective…
Abstract
Purpose
The purpose of this study is to empirically examine the cause–effect relationships between workplace friendship and knowledge-sharing behavior, from a static perspective. Furthermore, it investigates the bi-directional relationship between the increase in both workplace friendship and knowledge-sharing behavior over same time periods, and also endeavors to identify whether there is a significant negative lagged effect of the increase in both workplace friendship on knowledge-sharing behavior, and vice versa, across time from a dynamic perspective.
Design/methodology/approach
The study conducts a three-wave questionnaire survey to test the research model. A latent change score approach was used to test the direct relationship between changes in workplace friendship and changes in knowledge-sharing behavior.
Findings
The findings reveal that knowledge-sharing behavior fosters workplace friendship and workplace friendship promotes the emergence of knowledge-sharing behavior. An increase in workplace friendship promotes an increase in knowledge-sharing behavior over same time periods. However, an increase in workplace friendship will lead to a lagged decrease of knowledge-sharing behavior across time, and vice versa.
Research limitations/implications
The time interval in this study is a little short to capture the full changes in workplace friendship. Some important control factors and mediating mechanisms are not included in the research model.
Practical implications
This study guides managers to focus on various motivators to better strengthen workplace friendship and knowledge-sharing behavior and to consider and effectively respond to the negative side of workplace friendship and knowledge-sharing behavior across time.
Originality/value
This study emphasizes the predictivity of one important interaction patterns, namely, knowledge-sharing behavior on friendship at the workplace, from a static perspective. This study also shows the benefits of an increase in workplace friendship for the development of knowledge-sharing behavior in the same time period. Furthermore, the study presents a counterintuitive finding when taking the lag effect into consideration in exploring the relationship between changes both in workplace friendship and knowledge-sharing behavior, and identifies a negative side of both when viewed over longer periods.
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Chao Feng, Nannan Xi, Guijun Zhuang and Juho Hamari
Despite the relatively long research continuum on IT capability and performance, the “IT capability-performance” link has remained hazy especially related to the mediating role of…
Abstract
Purpose
Despite the relatively long research continuum on IT capability and performance, the “IT capability-performance” link has remained hazy especially related to the mediating role of IT-based communication and networking overall. Therefore, this study investigates how IT capability affects Internet interactive practice and how it further affects marketing effectiveness and firm success.
Design/methodology/approach
The authors collected the survey data from 504 manufacturers in China, and structural equation modeling is used to test the hypotheses.
Findings
The results indicate that (1) IT capability has positive effects on both interorganizational systems (IOS)-enabled and social media (SM)-enabled interactive practice; (2) IOS-enabled interactive practice has a significant positive effect on both marketing and financial performance while SM-enabled interactive practice has a positive effect on marketing performance but no effect on financial performance; (3) IOS-enabled interactive practice mediates the effect of IT capability on marketing and financial performance while SM-enabled interactive practice only mediates the effect of IT capability on marketing performance; (4) marketing performance mediates the impact of IOS-enabled and SM-enabled interactive practice on financial performance.
Originality/value
This study has highlighted the role of social media practice in the relationship between IT capability and firm performance, which makes certain theoretical contributions to the existing research.
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Wei Yuan, Nannan Wang, Qianjian Guo, Wenhua Wang, Baotao Chi, Angang Yan and Jie Yu
The high-load operation of the engine crankshaft causes severe wear and fatigue. This study aims to prepare in situ textures with effective density and study their wear mechanism…
Abstract
Purpose
The high-load operation of the engine crankshaft causes severe wear and fatigue. This study aims to prepare in situ textures with effective density and study their wear mechanism on the surface of ductile cast iron, which optimizes the tribological properties of engine crankshafts and reduces wear.
Design/methodology/approach
A new method was proposed based on the hardness difference in graphite removal to form an in situ texture. The friction performance was evaluated using a combination of computational fluid dynamics and tribological testings. The influence of the texture characteristic parameters on the bearing capacity of the oil film was analyzed. The surface wear morphology was studied by scanning electron microscopy.
Findings
The texture density significantly affected the oil film bearing capacity. The surface texture can reduce the average friction coefficient (COF) by more than 35% owing to the oil film bearing and storage capacity. Specifically, the 13% texture density exhibited the lowest wear rate and COF under all three experimental conditions. The reduction in abrasive particles in the wear area of the textured surface indicates that the surface texture can improve the lubrication mechanism.
Originality/value
This study systematically explored the influence of the weight of each model parameter on tribological properties. Subsequently, focusing on the critical parameter (texture density), detailed tribological testings were carried out to reveal the specific effect of texture density on the wear mechanism under different working conditions, and the optimal texture density to achieve the optimal tribological performance was determined accordingly.
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Do corporate social responsibility (CSR) practices necessarily increase their social capital? The key to answering this question lies in understanding the impact of the…
Abstract
Purpose
Do corporate social responsibility (CSR) practices necessarily increase their social capital? The key to answering this question lies in understanding the impact of the interactive behavior of CSR and social capital on the sustainable operation and development of enterprises. This paper finds that existing studies cannot accurately describe the inherent interaction between CSR and social capital, and the results verified by econometric models are often abstract and do not adequately reflect the actual business situation of enterprises.
Design/methodology/approach
This article tries to make a breakthrough in two aspects: the article identifies the common practice object of CSR and social capital by using the “stakeholder” mechanism and puts forward the hypothesis of the relationship between CSR and social capital by observing the interaction behavior between enterprises and stakeholders; based on the perspective of sustainable development, the article proposes the elements of “trust, norm and rationality,” analyzes the behavioral choices of enterprises in social responsibility practice and social capital accumulation and clarifies the inherent relationship between them.
Findings
The article points out the impact of the multifaceted nature of the relationship between CSR practices and social capital enrichment on the sustainable development of enterprises and proposes that manufacturing enterprises in transformation and innovation should be analyzed using an objective position rather than value judgment.
Originality/value
This paper synthesizes the assessment data from the questionnaire, interview data and sustainability analysis to answer the questioning of existing research: CSR does not necessarily increase corporate social capital, and the relationship between the two is complex and multifaceted, depending on the specific target and business state of the company. The focus of this paper is to analyze in detail the three relationship assumptions that form when companies interact with their stakeholders, based on the sustainability perspective of “trust,” “norms” and “rationality.”
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Lu Wan, Yanqi Fang, Nannan Ban, Guo Cheng and Guohua Huang
This paper aims to explore the relationship between digital transformation, international competition and productivity progress by examining the dual margins of export, thereby…
Abstract
Purpose
This paper aims to explore the relationship between digital transformation, international competition and productivity progress by examining the dual margins of export, thereby identifying the digital development pathway for key industrial chains within the context of regional medical and health cooperation.
Design/methodology/approach
By constructing models incorporating both the extensive margin and intensive margin, this paper delves into the reasons underlying changes in product trade value and variety within international market competition. Utilizing export data for medical products from China to Belt and Road Initiative partner countries spanning from 2007 to 2020, an industry–destination–time panel benchmark model is established to assess the impact of digital transformation on product expansion and international competition.
Findings
The findings reveal the following insights. First, digital transformation positively impacts the intensive margin of medical products, whereas it does not exert a positive influence on the extensive margin. Second, the impact mechanism test indicates that digital transformation fosters the intensive export margin by enhancing the technical efficiency of exports but exhibits an inverted U-shaped effect on technological progress. Third, digital transformation demonstrates a notable non-linear characteristic, with a substantial increase in the lifting effect once a certain threshold is surpassed.
Originality/value
While previous research has extensively explored the effects of digital transformation on export trade, this study uniquely integrates the concepts of the intensive and extensive margins of export, thereby enriching the research insights derived from existing literature. It focuses on the nonlinear effects and threshold dynamics of digital transformation, particularly in relation to total factor productivity. Additionally, the paper makes a contribution to the understanding of the Health Silk Road by incorporating the health index.
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Xiannong Wang, Nannan Wang and Boya Jia
The concrete-filled double skin steel tubes (CFDST) column is a new type of steel composite structure column. At present, international and domestic research are still lacking in…
Abstract
The concrete-filled double skin steel tubes (CFDST) column is a new type of steel composite structure column. At present, international and domestic research are still lacking in regards to this composite structure column. Therefore, a study of the composite structure column would have great theoretical and practical significance. In this paper, an experiment using concrete-filled double skin steel tubes columns with square-circular section is conducted under repeated loading and then under static axial compression. The test results show that the new type of composite structure column has excellent ductility and relatively good surplus bearing capacity. So, the test has laid a certain foundation for doing analysis and study on the new type of composite structure column in the future.