Papers by Keyword: Design Process

Abstract: This study aims to develop and validate a comprehensive strategy consisting of four dimensions for effectively managing construction waste (CW) arising during the Architectural Design Process (ADP) within Architectural Design Firms (ADFs) in Egypt. To accomplish this aim, a hybrid research approach, integrating qualitative and quantitative methods, was designed to address four specific objectives. Firstly, a thorough literature review was conducted to explore the topics of ADP, CW, Waste Management (WM), as well as national and international Waste Management Strategies (WMS). Secondly, three construction-based case studies from Saudi Arabia, China, and Thailand were gathered and analyzed to investigate the efficacy of identified WMS in managing CW originating during ADP. Thirdly, a survey questionnaire was administered to a representative sample of ADFs in Egypt to assess their understanding and utilization of WMS during ADP. Finally, the research formulated and validated a four-dimensional strategy for managing CW originating during ADP in ADFs. Data analysis revealed that ADFs possess a moderate level of knowledge regarding WMS, with limited awareness of Egyptian laws, regulations, and WMS during ADP. Among the identified WMS, "Prefabrication" emerged as the most favoured, followed by Building Information Modeling (BIM) and "on-site waste management". However, the implementation of these strategies faces several challenges. Furthermore, the research identified "preparation and briefing" as the design stage most susceptible to CW causes, with "waiting" and "defects" being the most prevalent forms of CW originating during ADP.

Abstract: Due to the good potential of Holzewig products, which resemble the function of wood, PT. Pracetak Bangun Indonesia plans to make finished products ready for use by the general public. Because there are several constraints in the production process, such as product design, the product manufacturing process, and the assembly process, planning and design processes are needed. one that can be used to make production process choices, namely the Design for Manufacture and Assembly (DFMA) and Activity-Based Costing (ABC) methods for calculating the cost of production. By using the DFMA method to find proposals for the production process, the process of making a design proposal is not much different from the process of making a set of chairs and a dining table made of wood; it's just that there are some differences due to the different materials used, so that the types of tools and assembly materials are different. The cost of goods sold obtained for making a set of chairs and tables consisting of 2 chairs and 1 table is 987,333.73. Holzewig material can be used in place of wood as an alternative for furniture products because its overall weighing value is just 0,001 less than that of wood.

Abstract: In recently years, Automotive industry in Vietnam is a fast growing sector, mainly reliant on domestic produces, assembly and sales. There are some details of cars that have been modeled, calculated to research and fabricate. Body vibration of the vehicles is one of the criteria to evaluate quality in the process of manufacturing and assembling automobiles. There are so many factors affecting on vibration of vehicles, in that body structure is one of the main causes. Up to now, automobiles manufactured and assembled in Vietnam have not yet had specific evaluations and standards on vibration. Determination of characteristic body vibration is a main part to reduce sound and vibration. In this paper, the modelling and calculating the body’s characteristic vibration of cars manufactured, assembled in Vietnam was researched. The body structure is designed by 3D model using commercial Catia Software. The model was transformed from Catia software to Hypermesh software, using finite element method to simulate. The calculation results of 25 measurement characteristic vibrations whose frequency is in range of 22.77 Hz to 97.21 Hz. The results are shown that, characteristic vibration of state 1 and 2 significantly influence the noise of the body. This is also the basis for optimal analysis of the body structure to control the vibration and noise of automobiles.

Abstract: At present, we are aiming to improve the localization rate and cost reduction in Vietnam, the bus manufacturing units have made their own chassis on the basis of appropriate selection. Passenger bus body frame design is an important process to ensure the suitability and quality of the product before the manufacturing. According to the governmental regulations, the vehicle manufacturing sector in Vietnam must comply with a design approval process and type approval test. Designs must be approved by the competent authority prior to the commencement of manufacturing. There are some applicable regulations in Vietnam such as the standard QCVN 09:2015/BGTVT and QCVN 10:2015/BGTVT on the standards for passenger buses to ensure technical safety and environmental protection. However, there is no specific regulation on the evaluation of bus durability to ensure the passive safety of such vehicles. During the design process, it is possible to calculate the durability accurately that determines the quality of the passenger bus body frame. It could enable automobile manufacturers as well as the competent authorities of design quality approval to control the bus body frame quality, resulting in the improvment of the pruduct, the competitiveness of the product and reducing the production cost. This presentation is the result of structural studies which calculated the deformation of the passenger bus body frame in frontal crash in accordance with the standard ECE R33 and the case of flipping in accordance with the standard ECE R66 for the 46-seat passenger bus, manufactured in Vietnam by Ansys/LS-Dyna software. Accordingly, this evaluation was implemented to assess the quality of the passenger bus body frame in the design process. The result shows that the passenger bus body frame meets the requirement of durability and passive safety in accordance with the calculated standards.

Abstract: To get all outstanding mechanical properties from ultra-high strength steel (UHSS) transformed into a lightweight and durable product, a comprehensive design process must be performed. The general DFMA method has been extended to get good design solutions with limited designer resources and within a relative short time period. Key steps of the extended DFMA design process are innovative brainstorming, the agile utilization of the optimization software, the heavy use of finite element analysis and fast design iteration. In this paper, the modified DFMA design method is described step by step. This method has been successfully used in the design process of the small lightweight rally car frame. The design process of the rally car is introduced as a case example of implementation of the extended DFMA.

Abstract: Various architectures exposing certain phases of the design process have been developed. A closer analysis of the presented timelines is leading more to postpone the design solution rather than advancing it in the early phases. This paper advances a new architecture for the design process with the main emphasize on the product functional design, based on functional-constructive knowledge stored in databases, and on the principle of selecting design solutions in an incipient phase and developing them during the further design process stages.

Abstract: Development of advanced engineering environment software allows changing the design process of complex technical means. This situation correlates with the increasing process of new product elaboration what results from the dynamically changing demand on a new market offer. It is important to elaborate the methodology of a designing process that improves and enriches the design process in an advanced engineering design. One of the most serious challenges is to elaborate the optimization methodology for the designing process of complex technical means. It should include both the requirements resulting from different social aspects of a technical mean existence and from different phases of its life cycle. The paper presents the integrative approach to the design process. It includes different types of design requirements integrating them in a design process. It allows obtaining optimized constructional solution. The method is illustrated using such advanced engineering environment like Siemens NX 8.5 software. It is also proposed the conception of object analysis that adding the design process.

Abstract: This Design Structure Matrix is a method and a tool used to capture, analyze and optimize iterations in the design process. It has been widely used over the past two decades by researchers from both academia and industry. DSM is well suited to identify iterations in the design process. Many heuristics were developed to deal with DSM in order to reduce the number of iterations by rescheduling the tasks of the design process. These heuristics are based on a process called partitioning. These heuristics give generally an approached solution but not the optimal one. In this paper we introduce a new algorithm in order to get the exact solution of the partitioning process using linear programming.

Abstract: The goal of the CAD parametric modeling is to create a 3D representation, flexible and complex enough to encourage the engineer to easily consider a variety of designs with the cost of applying changes as low as possible. Geometric modeling systems provide a virtual environment similar to the real one in which the physical model is constructed/designed and manipulated. Using such a system, the engineer models, adds, deforms and edits parts in the process of detailing a shape. The virtual model may look the same as the real physical model, but it’s intangible. However, the 3D virtual model is accompanied by its mathematical description, parameters, restraints and these eliminates the need of measurements for prototyping or mass production, can be modified at any modeling phase, can be tested in various ways etc., which is a major disadvantage of using a physical part. This paper presents some theoretical aspects regarding the design process of products including surfaces and a few case studies showing the many possibilities in creating complex surfaces using the CATIA v5 software.

Abstract: The individual needs of customers as well as the wide variety of environments and scenarios in which the products are used, have influences on product structure and configuration as well as in their design. These influences increase the degree of product customization especially for highly complex products with precise destination, unique or manufactured in very small series. This paper presents a case study on a cabin of an electric power generation turbine in order to identify the actions taken, tools used by the designers in the design process, co-design aspect of the product and the possibility to develop a method for customized products design.