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Dynamic failure characteristics of a metallic sandwich plate with repeated metallic cores considerably affect the dynamic property and the functionality of the plate. The objective of this paper is to examine dynamic failure characteristics of a metallic sandwich plate with repeated metallic truss cores subjected to plane strain drop impact conditions via a three-dimensional finite element analysis...
This study was performed to investigate the joining possibility and characteristics of the dissimilar joint between carbon fiber reinforced plastics (CFRP) and amorphous polyethylene terephthalate (PET) plastic using a continuous wave (cw) diode laser with a line-shaped beam. Tensile shear test results demonstrated that strong lap joints with a maximum load of 3200 N could be produced under some proper...
The pressing needs of energy, water and other resource conservation worldwide is a major engineering challenge. In manufacturing, developing green technologies (from process and tooling to the entire enterprise) is one way to insure that future manufacturing systems are sustainable. To do this, innovation in advanced manufacturing is needed. The basic requirements of green technology are discussed...
Chemical mechanical planarization (CMP) is an essential manufacturing process in semiconductor fabrication. Chipmakers continue to adopt CMP for device planarization or surface finishing of substrate materials. Evaluating the environmental impact of the CMP process may contribute to the greening of the semiconductor process. In this paper, we propose a mathematical model-based evaluation method to...
In recent years, there has been growing consideration of renewable energy especially photovoltaic devices. A silicon (Si) based solar cell is the most popularly and frequently considered among the photovoltaic devices, but its bulk thickness issue lowers the performance and hinders widespread application due to the material cost. Also, this thick nature causes difference in length between minority...
An effective and reliable fabrication approach for silver nanostructure arrays was developed using UV nanoimprint with a lift-off resist and a Si-based etch mask for enhanced plasmonic resonance-driven device performance. Since a tapered nanopillar array is imprinted on the resist, by coating it with a Si-based etch mask layer and carrying out the etching procedure, a reverse-tapered nanohole array...
In this paper, a total of 57 micro and nano scale hybrid manufacturing processes are reviewed. These processes are categorized in terms of process timing and process type. Process timing is one of the most important aspects of manufacturing, and three different process schemes — concurrent, main/assistive (M/S) separate, and main/main (M/M) separate — are considered. The process type is categorized...
The International Journal of Precision Engineering and Manufacturing-Green Technology (IJPEM-GT) was inaugurated in order to foster knowledge sharing and collaboration of researchers in the field of “green manufacturing.” While emerging technologies can be evaluated by business points of view such as Hype Cycle of Gartner, in this paper, journals and research areas in green manufacturing were evaluated...
End-of-life vehicles (ELVs) are important recycling sources, and there are several recycling stages, including dismantling, shredding, and treatment of the automotive shredder residues (ASR). The legal recycling rate should be at least 95% by 2015. To achieve this, a unified system to monitor the recycling of ELV parts and to calculate practical recycling rates is required. This paper describes a...
The influence of fabrication processes on the LIBS (Laser Induced Breakdown Spectroscopy) spectra of major and minor chemical constituents in CuIn1-xGaxSe2 (CIGS) absorber films produced by co-sputtering and co-evaporation techniques on Mo-coated soda lime glass (SLG) is reported. It was found that the ablation rate per pulse of CIGS layers fabricated by the co-sputtering technique is higher than...
The manufacture of helical pinion gears has involved machining processes such as hobbing and shaving to achieve the required dimensional accuracy. However, these conventional processes have some disadvantages such as excessive material loss, low productivity, high-energy consumption, and high carbon emissions. To overcome these problems, a cold extrusion process is applied to the manufacture of helical...
In metal forming, lubricants are still used to prevent corrosion, to reduce friction, wear and tool load as well as to protect the workpieces and intermediates. In economic and ecological points of view, the challenge is the avoidance of lubricant usage. Within this article we define the term of dry metal forming, a technology which contributes an approach to establish green technology in mass production...
We present a continuous fabrication method to make bio-inspired water collecting surface by using roll type photolithography for potential applications to real time air monitoring system. In this study, the carapace of the stenocara beetle was mimicked to achieve water collection from air, using a molding process involving micro-/nanofabrication techniques and roll type photolithography. We fabricated...
In the present paper, we fabricated and tested anode-supported solid oxide fuelcell(SOFC) with gadolinium-doped(GDC) and yttriastabilized zirconia (YSZ) electrolyte. The bilayer electrolyte thin film, consisting of a 8 μm thick YSZ layer and a 40 μm thick GDC layer, was prepared by a simple dry-pressing with simple spray coating process which is cost-effective method. The two electrolyte layers were...
Hall sensor array is used to measure the position of a magnet array and needs compensation of errors caused by manufacturing tolerances as well as harmonic components of the magnetic flux of the magnet array. This paper presents a 2D hall sensor array to measure the position of a magnet matrix by filtering harmonic components. First, 1D sensor array to filter out arbitrary number of harmonic signals...
Owing to mounting environmental issues, coupled with public pressure and stringent regulations, firms and companies have to alter their ways of developing new products. Three key areas i.e. end-of-life (EOL) management, green supply chain and sustainable manufacturing have to be considered during design stage. The purpose of this paper is to propose a framework based on axiomatic design (AD) principles...
Air-breathing proton exchange membrane fuel cells (AB-PEMFCs) can reduce the cost, complexity, noise, volume, and weight of fuel cells and can enhance their reliability. However, such cells are still typically characterized by low output power densities. In this study, to overcome the inherent weaknesses of low power density and oxygen concentration without mobility loss, we have adopted a microscale...
The globalization of suppliers and personalization of customers require new manufacturing strategy for environmental issues, region’s special regulation and energy besides manufacturing factors from manufacturers. In this study, green factory is defined as a manufacturing floor that reduces waste elements such as extra work, energy, time and cost through quickly responding to external uncontrollable...
This paper introduces a novel geometry for a pure-twisting soft morphing actuator that improves the stability of the actuator and allows it to obtain a larger twisting angle. The smart soft composite (SSC) actuator uses pair of NiTi shape memory alloy (SMA) wires embedded in a cross-shaped polydimethylsiloxane (PDMS) matrix at constant and opposite eccentricity across the cross-section in opposite...
The integrated material flow analysis methodology uses bottom-up flow analysis for primary and secondary resources and top-down flow analysis for the distribution structure. By combining the advantages of the top-down and bottom-up methods, the integrated material flow analysis Methodology can overcome the limitations of each method. Using the IMFAM, this study investigated the material flow of terbium...
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