Steve Hsueh-Ming Wang

Tool/Chip Interfacial Friction Analysis in Atomistic Machining of Polycrystalline Coppers

Three-dimensional (3D) molecular dynamics (MD) simulation is performed to study the tool/chip interface friction phenomenon in machining of polycrystalline copper at atomistic scale. Three polycrystalline copper structures with the equivalent grain sizes of 12.25, 7.72, and 6.26 nm are constructed for simulation. Also, a monocrystalline copper structure is simulated as the benchmark case. Besides the grain size, the effects of depth of cut, cutting speed, and tool rake angle are also considered. It is found that the friction force and normal force distributions along the tool/chip interface in both polycrystalline and monocrystalline machining exhibit similar patterns. The reduction in grain size overall increases the magnitude of normal force along the tool/chip interface, but the normal forces in all polycrystalline cases are smaller than that in the monocrystalline case. In atomistic machining of polycrystalline coppers, the increase of depth of cut consistently increases the normal force along the entire contact area, but this trend cannot be observed for the friction force. In addition, both higher cutting speed and more negative tool rake angle do not bring significant changes to the distributions of normal and friction forces on the interface, but both factors tend to increase the magnitudes of the two force components.

From Green to Sustainability—Trends in the Assessment Methods of Green Buildings

This research investigates recent developments in assessment methods of green buildings and compares the differences in rating systems among the United Kingdom, USA, and Germany. There are indications that the rating systems are moving from green buildings to sustainable buildings. In order to understand the recent research in academic areas, we survey the recent Ph.D. dissertations and literature related to green building assessment. Discussion is provided on the major research areas of green buildings, which cover accountability of life cycle cost, methodology for balancing the three pillars, and government vision and public policy.

A Survey of Sustainable Design-Centered Integration for Medical Additive Manufacturing

A number of materials have been used for Medical Additive Manufacturing (MAM), such as stem cells, biopolymers, metals, bio-ceramics, and bio-glass. Recent research includes potential applications in the replacement of human tissues, organs, and bones by using the bio-printing technology. MAM also has been applied to build up a dummy prototype to simulate a complicated operation process before surgery. Sustainable design of MAM has a need for the development of the system to be environmentally, economically, and socially sustainable for its life cycle. This paper surveys the scope of the sustainability of MAM in terms of these three categories. The methodology and tools for assessment of the sustainable development of MAM processes are discussed. This paper analyzes several examples of the application of additive manufacturing in medicine which have been published in recent journals. There are four critical areas of the design-centered system integration for sustainable development in this survey. The investigations for MAM processes including (1) the materials, (2) the precision of the advanced machine tools and tissues, (3) the mechanisms of the processes, and (4) the mechanical properties of the implanted components after MAM. The results can be used as a reference for the assessment of future sustainable Design-Centered Integration for MAM.

Determination of Sustainable Design-Centered Factors for Manufacturing Bioprinting Material of Polylactic Acid

Sustainable design-centered manufacturing (SDM) is a competitive advantage for new product development. In this research, we determine the SDM factors for Polylactic Acid (PLA) production from cradle to gate. PLA is a mainstream material for bioprinting. We utilize a holistic method to determine the most sensitive and significant sustainability factors among economic, environmental, and social pillars, by adopting ISO 14040 and 14044 frameworks, life cycle cost analysis, and regression analysis methods. The results show that three major sustainability impact factors are profit, water consumption, and health and wellness effects, and the corresponding strategies are proposed. As a result, SDM can help increase profitability, create positive social impacts, reduce waste of resources, and utilize resources with efficiency.Copyright

Feasibility Analysis of Using Local Remanufactured Products: A Case Study of Industrial Starters and Alternators

Reported by the U.S. International Trade Commission, production of remanufactured goods had a total annual amount of approximately

A CUSUM Control Chart to Monitor Wafer Production Quality

43 billion and accounted for about 2% of total manufacturing annual sales from 2009–2011. The remanufacturing industry of motor vehicle parts was the third largest of the remanufacturing sectors and had a production of remanufactured goods with an annual total of approximately

Trends in Sustainable Design Centered Manufacturing

6.2 billion in 2011. Reliable replacement engine parts for heavy duty equipment in Alaska are a high need. Remanufactured engine parts are one way to fulfill that need. While remanufactured industrial starters and alternators are available in Alaska they are currently remanufactured out of state and shipped to a local Anchorage, Alaska business to be sold. The purpose of this paper is to determine what the best method of obtaining industrial starters and alternators is. To that end a variety of forecasting analysis is performed using data from an Anchorage, Alaska business. The results indicate that while remanufacturing industrial starters and alternators in Anchorage, Alaska is possible, there are some problems such as core availability and employee utilization that need to be overcome in order to make it a viable option.Copyright

Using Balanced Scorecard for Sustainable Design-centered Manufacturing☆

Abstract The cumulative sum (CUSUM) control chart is much better than a C control chart when the process demonstrates small to moderate-sized shifts. This study provides the calculating formula for the CUSUMs reference values, calculates ARLs using a Markov chain approach for a semiconductor production. An actual data set from a wafer plant is used to demonstrate the operation of the proposed model. Simulation method is used to double-check the analytical ARL result. The results show that CUSUM control chart has significantly better performance. It provides a useful method to detect the process variations and improve process quality for wafer plants.

Sustainable Program Quality Management of International Infrastructure Construction

This paper illustrates a new manufacturing capability which is driven by design and sustainability. Several objectified design cases by using or waiting the new insertion of manufacturing technologies have been discussed. The cases of the leading products or systems in the world include Kazuo Kawasaki eyeglasses, Mac ibook, Boeing 787-8, integrated circuit, plasmafication, and information based medicine. The research also forecasts the value increased the activities of design centered manufacturing. After defining the scope of sustainability, an analysis of a strategy of a sustainable organization is also included. The research results predict that the competitive advantages of new products come not only from the advanced manufacturing technologies but also from a sustainable design centered manufacturing approach.