A critical analysis on the triple bottom line of sustainable manufacturing: key findings and implications.

Because of the environmental consequences of manufacturing activities, the general public, industry, and academia are becoming more aware of sustainable manufacturing (SM), which incorporates environmentally friendly manufacturing processes while emphasizing overall triple bottom line (TBL) performance in manufacturing. This article employs various text mining techniques and bibliometric analysis including cluster analysis, Pearson coefficient and research landscape to conduct an extensive investigation on SM with a focus on the TBL, in which the research content of SM with the TBL is reviewed and discussed systematically from a wide angle and with reduced bias. In this study, three new indicators about the ratios of the number of scientific papers between social, environmental, and economic dimensions of SM are devised to show the weight and level of importance of dimensions in SM, covering scientific papers from 30 years. The findings from this study indicate that the influential power of SM varies across the three dimensions, with a particular emphasis on the social dimension of SM from various countries, implying a current state of imbalance status in TBL for SM, at the same time, the economic and environmental dimensions share similar research topics and academic emphasis in SM. Based on these findings, recommendations based on sustainable development goals (SDGs) of the United Nations (UN) are made to increase the social influence of SM. This article firstly reveals the individual status of the social dimension and the situation of unbalanced TBL in SM, providing sustainable suggestions for enhancing the effectiveness of SM and achieving balanced TBL regarding the SDGs.

Numerical Investigation on the Effects of Grain Size and Grinding Depth on Nano-Grinding of Cadmium Telluride Using Molecular Dynamics Simulation.

Cadmium telluride (CdTe) is known as an important semiconductor material with favorable physical properties. However, as a soft-brittle material, the fabrication of high-quality surfaces on CdTe is quite challenging. To improve the fundamental understanding of the nanoscale deformation mechanisms of CdTe, in this paper, MD simulation was performed to explore the nano-grinding process of CdTe with consideration of the effects of grain size and grinding depth. The simulation results indicate that during nano-grinding, the dominant grinding mechanism could switch from elastic deformation to ploughing, and then cutting as the grinding depth increases. It was observed that the critical relative grain sharpness (RGS) for the transition from ploughing to cutting is greatly influenced by the grain size. Furthermore, as the grinding depth increases, the dominant subsurface damage mechanism could switch from surface friction into slip motion along the <110> directions. Meanwhile, as the grain size increases, less friction-induced damage is generated in the subsurface workpiece, and more dislocations are formed near the machined groove. Moreover, regardless of the grain size, it was observed that the generation of dislocation is more apparent as the dominant grinding mechanism becomes ploughing and cutting.

Discover the trend and evolution of sustainable manufacturing: a thematic and bibliometric analysis.

Manufacturing, as one of the most important sectors in a civilized society, has a strong impact on our city's sustainability issues, and it is therefore justified in taking a more sustainable approach in the future. As a consequence, research works and the research trend of sustainable manufacturing (SM) play a critical role in supporting the sustainable development of industries. With the knowledge of the research themes on SM from the past to the present, preferred options for planning the future of manufacturing and executing SM could be offered to industries. Motivated by this, this study presents a thematic and bibliometric analysis on research papers of SM, with the goal of providing an overall overview of SM research trends, as well as identifying the critical time of having major breakthroughs and evolution of the corresponding research works by comparing the research themes across the longitudinal timeline. A thematic analysis was used to determine the keywords and main themes of the research on SM in various time frames, as well as the perspectives on how the research works in relation to current technology and dynamic changes. Finally, the three stages of SM research were determined based on the overall results. Furthermore, this article demonstrates the research directions and advancements of SM in 2020, presenting the most recent research trends in SM to both industry and academia.

Theoretical and Experimental Investigations of Tool Tip Vibration in Single Point Diamond Turning of Titanium Alloys.

The material swelling effect in single point diamond turning (SPDT) causes ragged materials on a machined surface which slows down the movements of tool tip vibration, and acts as a simple impacted pendulum system with a damping effect and displays a single twin peak in fast Fourier transform (FFT). Due to the low elastic modulus and low thermal conductivity of titanium alloys, the material swelling effect of titanium alloys in SPDT is much more serious than that of traditional metals. For this reason, the tool tip vibration in SPDT of titanium alloys is expected to be different from previous reports. In this study, apart from the demonstration of the original single twin peak induced from the material swelling effect by the main cutting motion, we reported recently that there exists another twin peak induced by secondary material swelling arising from the movement of tool tip vibration in the SPDT of titanium alloys. The additional twin peak was located at the right side of the original twin peak in FFT, displaying two twin peaks in the frequency domain of cutting force and suggesting the existence of another tool tip vibration system with a new damping factor in the SPDT of titanium alloys. Combining the effects of primary and secondary material swelling, the new dynamic model with the modified damping factor of tool tip vibration system are developed, which surface roughness of the machined titanium alloys in SPDT was predicted in higher accuracy by using the new model. The FFT of cutting force, surface roughness, and surface profile were provided in this article for the experimental validations.