Applied Mechanics and Materials Vols. 789-790

Abstract: Many structural failures in precast concrete buildings are initiated by connection failures. To avoid such failures, the connections should have enough strength to join the reinforcement bars between precast concrete panels. This paper presents the structural performance and behaviour of a proposed splice sleeve connection using generic steel pipe. The connection consisted of steel bars with tapered nuts confined in grouted steel pipes. The connections were subjected to increasing axial tension until failure. The results show that the use of smaller pipes gives better confinement effects and provide higher bond strength. A short embedment length of about 10 times rebar diameter is able to provide full tensile strength of the connected rebars. As compared to long embedment length of conventional lapping of steel bars, the proposed connection is able to provide structural continuity with short embedment length.

Abstract: The main objective of the paper is to confirm or exclude a statistically significant impact of airtightness on the energy performance of buildings. Energy performance of buildings is characterized by a specific energy demand for heating and specific total primary energy. Airtightness is one of the key factors of energy efficient buildings. The quality of airtight building envelope except for low energy consumption also minimizes the risk of damage to the structure associated with the spread of the heat and water vapor in the structure.

Abstract: Successful business enterprises are to a great extent determined by strong sales and overall low operational cost; as a result, improving quality and reducing cost have been one of the important tasks for any business enterprise. These will help in achieving high quality products at reasonable price. Thus, due to the effectiveness of Six Sigma in improving quality and reducing cost, it has become an excellent initiative that is gaining momentum in the business world. However, academics have conducted little research regarding this phenomenon, especially on it applicability in manufacturing industries. Therefore, this paper seeks the knowledge regarding how P-Diagram Model (Taguchi Method) can be applied in product development stage to achieve Design for Six Sigma (DFSS). The paper illuminates on “Process” as the basic unit for Six Sigma and how production process can be enhanced using P-diagram. Following this understanding, the paper demonstrates how P-diagram can be applied in conceptualizing and developing product ideas that put into consideration users intent (User-centred design), reduce variations and thus, lower the risk of product failing.

Abstract: In this study, we discuss how to determine quality grades using the results from product tests. If many previous studies focus on how to conduct a test to find out bad products, or what test results you may use to find out good quality, we here studied on how we can integrate and utilize all the results of the tests we are carrying out, in order to find out products with good quality, rather than concentrating on a particular test. Through this, we are going to suggest measures to select and deliver only the products with good quality to the enterprises or fields where they are very sensitive to quality, while enhancing the effect of the reduction of the qualityrisk cost.

Abstract: In this paper using Fuzzy-QFD approach to product development: case studyfor 3D printer. The method that translating the customer needs into technical term, Fuzzy-QFDmentioned illustrate that it can be utilized in different ways and can be adapted to solve a greatnumber of design problems. The study starts by determining customer demand. Thereafter, identifying technical requirement based on QFD. This paper integrates fuzzy set theory and house of qualityto determine the importance weight of the customer requirement and the relationship between customer requirement and the technical requirement. The results proposed Fuzzy-QFD approach can be expected to be successful and has potential for multiple criteria decision-making problems.

Abstract: Design of experiment (DOE) is the focal collective of quality technique and is widely used in Research and Development (R&D) organization to optimize product design parameters. There are three main DOE approaches that commonly adopted by R&D companies, which are the classical Fisher’s DOE, Taguchi DOE and Shainin DOE. This paper explores how these three main DOE approaches could be integrated to optimize product design parameters in a Research and Development company. The paper starts with enlightenment of the common DOE steps, follows by discussion of issues faced by the Research and Development company during the implementation of the three DOE approaches in product design. The paper subsequently illustrates how the three DOE approaches could be integrated as a new methodology for optimization of product design parameters. The integrated DOE methodology presented in this paper offers an alternative and effective way to conduct DOE in a dynamic product design and development environment.

Abstract: Many manufacturers believe building of physical prototypes is a bottleneck that slows down production process and increase production cost. However, since the quest for reality ends up with making real objects, physical prototypes cannot be out-rightly eliminated in product development process. With the advent of rapid prototyping technology (3D printer), manufacturing is now possible at any scale, from units of one to millions, large or small batches. Thus, rapid prototyping is seen as a possible technology for enhancing product development process; especially in small and medium industries that relies on manual production techniques. Hence, this paper investigates the viability of rapid prototyping technology in small and medium industries. With particular reference to ceramic industry, the paper demonstrates how the contemporary technology (Rapid prototyping) can be harmoniously merged with conventional techniques, so as to enhance product quality and reduce development time and cost.

Abstract: This paper describes the roll powder sintering (RPS) technology providing breakthrough advantages for dominant rapid prototyping and manufacturing (RP&M) processes that are currently on the market. The RPS based on ribbon perforation where a powder needs to be poured, while it is being rewound. When the whole component roll is rewound, it is ready for a sintering plant. This technology has increased reliability, higher precision up to 77000 dpi, lower cost and power consumption. Processing time of plastic, ceramic, metal and other objects 1 m3 (or more) in volume directly from a 3D CAD model with a layer thickness of 30 μm is about 1 hour.

Abstract: The 3D printing method for the human tooth is a possible and good solution in the manufacture. However, the shrinkage is the most challenging problem to manufacture the tooth. In this paper, CAE analysis and experimental design are applied to predict the shrinkage of different dentures shape. Then the CAD model of the dentures can be reverse amplified before the sintering process. The product will be close to the patients’ requirements with precise dentures shape. It also avoids the complicated procedure of CNC machining and reduces dentists finishing time. The dental bridge is the main research objective investigated in this paper to verify the CAE simulation developed by the authors.

Abstract: — The defect is an imperfection that impairs worth or utility. The defects show some disorder of the product and it is opposite the standard or criteria that have been stated.. In order to define the defect, some techniques are being used. One of the technique is using image processing. The image will be captured by the camera and the image appear will be imported to the Scilab software to read it. Otherwise, the image will be translated into histogram graph to show the frequency (pixel) and grayscale value of the defect.Index Terms— Defect image, surface defect, grayscale image, Scilab software, histogram graph