Papers by Keyword: Product Design

Abstract: The world's design industry has suffered from the transformation from single-product design to mass-produced product design and the industrial revolution that today is the Industrial Revolution 4.0 and 5.0. Similarly, the design industry in Vietnam also has to go through that transformation process to develop, in which the team of trained designers plays a vital role in the transformation process and development. Around the world, research on the transformation process of design types, concepts, classifications, design processes, and their applications in all areas of life are the core bases for building goals, content, and methods of human resource training programs in the design industry. This article summarizes some typical design concepts and research results on the current situation, trends, and needs of the design industry in the world and Vietnam. On that basis, propose directions to supplement knowledge and develop design human resource training, especially in the fashion design industry, for the current economy in Vietnam.

Abstract: This research paper aims to investigate the significance of considering the humidity factor during material selection in plastic product design. Humidity is a crucial environmental parameter that can profoundly influence the properties and performance of plastic materials. To ensure the long-term performance and dependability of plastic products, it is essential to comprehend and take into consideration the impacts of moisture on plastics. Humidity plays a fundamental role in the degradation and functional changes of plastic materials. Moisture absorption can lead to reduced mechanical strength and accelerated degradation processes. The selection of appropriate materials that can withstand humid conditions becomes paramount in product design. For this reason it is important to evaluate the moisture absorption properties of plastic materials. Different polymers exhibit varying degrees of moisture diffusion rates that directly affect their performance in humid environments. Evaluation of moisture measurement results allows designers to make informed decisions during material selection. For this reason, we designed an experiment to investigate which material retains less moisture. In our research, we determined 2 different experimental groups. The first of these groups (type A) was kept under normal conditions by adding glass fiber additive at different rates to the PA66 material, and each product with 3 different additives was tested for moisture for 10 days and the results were recorded. In the second experimental group, type B, the products produced with the same material and additives at the same rate were kept in water for 24 hours, then they were removed from the water and moisture tests were performed. It is aimed to make material selection by interpreting the test results and thus to facilitate the making of designs suitable for use.

Abstract: The design process of street furniture nowadays focuses on aspects that go beyond functionality. In this type of product, total aesthetic integration with the space is sought in order to minimise aesthetic pollution. People's quality of life is directly related to the environmental, visual and sound impact of street furniture. Hence the search for sustainability through materials and finishes based on biophilic design. In the context of recycled materials, one branch of research focuses on the search for applications such as street furniture. In turn, 3D printing technology makes it possible to manufacture customised products and use recycled materials. This work focuses on the creation of organic textures for the creation of street furniture printed with recycled materials. The aim is to analyse the state of the art in this field and propose a series of textures and reliefs based on organic shapes, their manufacture by additive manufacturing of fused material (FFF) and their metrological study of the manufactured pieces with respect to the models created by computer-aided design.

Abstract: Additive Manufacturing (AM) has been one of the technologies that has been booming in recent years. Its main advantages are the versatility in the manufacture of parts, the ability to print limited series and its low acquisition cost, among others. Among these technologies, one of the most widely used by engineering and product design teams is Fused Filament Fabrication (FFF). PLA being one of the materials most employed for FFF. Likewise, for a proper shaping of this material and process, it is necessary to establish several parameters to define the quality and properties of the designed part. In this context, a comparison of two groups of pieces has been carried out. Whereas the first group exhibits a correct process parameters and an adequate calibration of the printing bed; the second, has not any bonding between layers or bonding of beads of the same layer, due to an incorrect establishment of the initial parameters. In order to compare these groups, a study of the internal structure was carried out by X-Ray CT along with a characterization of their tensile mechanical properties. Results show a similar maximum stress for both groups, but a drastic reduction of the plastic area in the parts with defects. The quantification and comparison of the mechanical properties of both tests might provide a rejection criterion for parts that work in tension and present defects similar to those studied for engineering teams in product design.

Abstract: Nowadays, tools such as Additive Manufacturing (AM) contribute directly to an increase in the value of Industrial Design through the development of new products focused on customization. Specifically, the acoustic guitar is a good example of this, because it is a complex product to study due to the great variety of possible designs depending on the materials and the way they are obtained, which has repercussions on the final sound of the instrument. Due to the above, this paper develops a methodology for the study of the acoustic response depending on the design of an acoustic guitar using AM with Polylactic Acid (PLA) material. The methodology is divided into two types of tests: an acoustic test to capture the frequencies emitted by transmitting a sweep of frequencies across the audible spectrum to the soundboard, and another to visualize the vibrational patterns at five specific harmonic frequencies of the guitar by analyzing the movement of the soundboard and the influence of the bracing. This second test includes the PLA designed top with a reinforcement structure in its soundboard and a case in order to compare this design with a wooden guitar of the same size whose top has no reinforcement at all. From the tests carried out, it can be seen that the acoustics recorded by a top made of PLA can provide a good acoustic response compared to a wooden guitar, giving the possibility to create customized guitars according to the musician's tastes.

Abstract: The Solid Ankle Cushioned Heel (SACH) foot is a commonly prescribed prosthetic foot for the rehabilitation of lower limb amputees. From the viewpoint of its biomechanical performance, the foot is known to cause drop-off effect and asymmetry in amputee gait. Therefore, the objective of this work is to improvise the effective foot length ratio (EFLR) and the progression of the centre of pressure (CoP) of the SACH foot by providing a novel design approach that utilizes finite element analysis. Boundary conditions employed for evaluating the roll-over characteristics of prosthetic feet were numerically incorporated in this work. The non-linear mechanical behavior of the foot was included with the incorporation of large deformation, a hyperelastic material model and the Augmented Lagrangian contact formulation. Outcomes from the simulations were experimentally verified using an inverted pendulum-like apparatus, thereby substantiating the numerical approach. The design process of the SACH foot involved the modification of the elastic modulus of its components for enhancing the parameters of interest. Results obtained presented a 5.07% increase in the EFLR and a 9.29% increase in the anteroposterior progression of the CoP, which may improve amputee stability. The design solution presented may support the large user base of the SACH foot towards achieving enhanced gait characteristics during ambulation. Moreover, this work successfully demonstrates a novel design procedure for a prosthetic foot through an effective numerical implementation.

Abstract: Several researches were focused on identifying the chromatic preference in general and on detecting the differences between women and men regarding the colour choices. Usually, researches are carried-out in a theoretical framework, considering that the preferred colours are invariant to their support. The experiment presented in this paper studied the chromatic preference considering three cases: neutral case (colours per se), low-tech products (colours on mugs) and high-tech products (colours on Lytro cameras). Also, the research studied the chromatic preference in terms of types of colours (focal, light, dark and intermediate).

Abstract: People create function of product, and also give it a certain form at the same time. It expresses a certain structure depending on the material. The process of product design is that of understanding and application of materials, and also a process of creation and innovation. So materials have important effects on product design and manufacturing. This paper discusses the application of the traditional materials in product design and its development trend, and mainly discusses the application of nanomaterials in automobile design.

Abstract: This paper presents relevant data for a robust design of thermoplastic products, as a support for optimization of product design. The study emphasis rules and recommendations related to wall thickness and corner design through which the developer could anticipate quality problems that might appear in the product’s lifetime, avoiding design features that might be difficult to be produced or produced with a cost that may not be feasible.

Abstract: We present a novel approach for automatically create industrial products, namely powertrains consisting of engine, transmission and power shaft. We apply a genetic algorithm for exploring the solution space, consisting of 3000 variants, using various criteria, such as power, efficiency and rotation speed. We compare our results with the ones obtained by a human expert in terms of number of feasible solutions, respectively in terms of best and average price. We prove that the proposed approach is generally better than a human expert in exploring the solution space.