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Continuous fiber reinforced thermoplastic composites (CFRTPCs) are becoming more significant in industrial applications but are limited by the high cost of molds, the…
Continuous fiber reinforced thermoplastic composites (CFRTPCs) are becoming more significant in industrial applications but are limited by the high cost of molds, the manufacturing boundedness of complex constructions and the inability of special fiber alignment. The purpose of this paper is to put forward a novel three-dimensional (3D) printing process for CFRTPCs to realize the low-cost rapid fabrication of complicated composite components.
For this purpose, the mechanism of the proposed process, which consists of the thermoplastic polymer melting, the continuous fiber hot-dipping and the impregnated composites extruding, was investigated. A 3D printing equipment for CFRTPCs with a novel composite extrusion head was developed, and some composite samples have been fabricated for several mechanical tests. Moreover, the interface performance was clarified with scanning electron microscopy images.
The results showed that the flexural strength and the tensile strength of these 10 Wt.% continuous carbon fiber (CCF)/acrylonitrile-butadiene-styrene (ABS) specimens were improved to 127 and 147 MPa, respectively, far greater than the one of ABS parts and close to the one of CCF/ABS (injection molding) with the same fiber content. Moreover, these test results also exposed the very low interlaminar shear strength (only 2.81 MPa) and the inferior interface performance. These results were explained by the weak meso/micro/nano scale interfaces in the 3D printed composite parts.
The 3D printing process for CFRTPCs with its controlled capabilities for the orientation and distribution of fiber has great potential for manufacturing of load-bearing composite parts in the industrial circle.
The microstructure difference and enthalpy changes have been investigated by scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) during the…
The microstructure difference and enthalpy changes have been investigated by scanning electron microscopy (SEM) and differential scanning calorimetry (DSC) during the as-cast ageing process. After the as-cast ageing process, the eutectic silicon and α-Al is in the ideal state for the alloy with 0.08 wt% mischmetal (MM) addition. The energy of the phase transformations is 5.8 J/g during the isothermal process, when Al-11%Si-0.27%Mg alloy is aged at 150°C. When the additive contents of MM are 0.03, 0.06, 0.08 and 0.1 wt%, respectively, the energies of phase transformations are 4.98, 1.39, 1.07 and 1.25 J/g correspondingly. It is shown that the energies of phase transformations decrease gradually as the MM content increases from 0 wt% to 0.08 wt%; the energies then increase upon further addition of the MM concentration from 0.08 wt% to 0.1 wt% in the as-cast ageing process. Furthermore, the beginning time of phase transformations is delayed with the MM addition.
Cross-organizational cultural intelligence (COCI) is conceptualized as an ability of individuals to interact effectively with persons from different organizational…
Cross-organizational cultural intelligence (COCI) is conceptualized as an ability of individuals to interact effectively with persons from different organizational cultures. To deal with culture differences in cross-organizational context, organizations need to select employees with high COCI. This study aims to develop an instrument to measure employees’ COCI in a cross-organizational context.
The present study was conducted in three steps to develop a scale to measure COCI. First, 39 statements were identified based on a series of interviews. Then, via a survey of 275 part-time MBA students, 18 statements were categorized into four dimensions, namely, cognition, motivation, collaborative communication and behavioral adaptability. Finally, convergent, discriminant, predictive and incremental validity of the scale were tested.
This study extends the cultural intelligence to the cross-organizational context. The COCI concept provides theoretical support for cultural intelligence research in the cross-organizational context. Therefore, the present study broadens the research field of cultural intelligence. A four-dimensional scale was developed to measure COCI, which includes cognition, motivation, collaborative communication and behavioral adaptability. High COCI can enhance employee’s performance in a cross-organizational context.
This study still has several limitations. First, the self-report questionnaire indicated that the relationship between COCI and other constructs may be stronger because of single-source, self-reported data collection. Second, the new scale was developed in China. Although some respondents came from foreign companies, most surveyed employees belonged to Chinese enterprises. Based on the current results, COCI scale exhibits promise as a measurable criterion, but it requires more refinement and validation. Additional work in this area can explore factors that can influence or improve individual COCI. A theoretical network of COCI that includes predictors, consequences, mediators and moderators by theoretical research can be established.
The COCI scale can be used in organizational management. Also, the COCI scale can help organizations understand the meanings of the employees’ COCI and select employees with high COCI during the recruitment. It makes managers easier to choose qualified candidates for inter-organizational projects. Beyond that, organizations can develop employees’ COCI according to the proposed four dimensions.
The development of the valid COCI scale will facilitate future research on boundary spanning. The COCI scale can measure individual cultural intelligence in a cross-organizational context. The present study has verified that COCI is different from emotional intelligence and provided a new perspective to explore the importance of individual ability in boundary-spanning activities. The instrumental support can help researchers effectively understand COCI and explore its potentials in boundary-spanning activities.
With the analysis of the causes of corruption, this study aims to investigate specific anti-corruption measures that can be implemented to reform the political system and…
With the analysis of the causes of corruption, this study aims to investigate specific anti-corruption measures that can be implemented to reform the political system and the social climate of China.
This study examines 97 severe corruption cases of high-ranking officials in China, which occurred between 2012 and 2015. As this insinuates that both institutional and social corruption are major problems in China, the analysis delves into multiple facts of corruption, including different types, four primary underlying causes, and suggestions regarding the implementation of three significant governmental shifts that focus on investigation, prevention tactics and legal regulations.
China’s corruption is not only individual-based but also it has developed into institutional corruption and social corruption. Besides human nature and instinct, the causes of corruption can be organised into four categories, namely, social customs, social transitions, institutional designs and institutional operations. For the removed high-ranking officials, the formation of interest chains was an important underlying cause behind their corruption.
This study makes a significant contribution to the literature because this study provides a well-rounded approach to a complex issue by highlighting the significance of democracy and the rule of law as ways to regulate human behaviour to combat future corruption.