Unidade de Investigação - CIIC - Computer Science and Communication Research Centre
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Browsing Unidade de Investigação - CIIC - Computer Science and Communication Research Centre by Author "Almeida, Henrique"
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- Advanced technologies for shoe sole productionPublication . Spahiu, Tatjana; Almeida, Henrique; Ascenso, Rita M. T.; Vitorino, Liliana; Marto, AnabelaAdvanced technologies for modelling and production are an important part in the whole process of product manufacturing. These advancements have changed the way of product development and play an important role in customization. In the footwear industry, as in any other industry, the use of these technologies is widely spread. Footwear comfort is one of the main selection criteria for purchase. Considering this fact, a case study of different steps for shoe designing according to individual foot shape will be presented. Taking into consideration the aesthetics of the sole and in a more sustainable view, through topological optimization reducing of material wastage for sole production will be presented. By means of the topological optimization in the shoe design process, sole optimization is realized. As a part of personalization, feet’s plantar pressure maps taken from 1 participant gave a better explanation of weight distribution of each foot. Following, sole personalization according the plantar pressure maps for each foot gives the possibility to obtain the best least material design according to the feet’s pressure while maintaining biomechanical performance.
- Fashion Products Through Digital Manufacturing - A Case Study With FDM TechnologyPublication . Spahiu, Tatjana; Almeida, Henrique; Manavis, Athanasios; Kyratsis, PanagiotisWe live in a digital world comprising the use of computer systems applicable to every process of manufacturing. Digital manufacturing is present in almost all areas of production by linking systems and process required from conceptualization to the final product. Through the use of digital manufacturing fashion products are designed and manufactured. Case studies of using the tools of 3D CAD software modeling to create novel products as textile structures, accessories and shoes parts as heels are presented. Taking inspiration from several sources, customized models are designed and with the great power of additive manufacturing as FDM technology, a non-expensive compared to the other types of additive manufacturing technologies, is implemented in the manufacturing of 3D CAD models. Without restriction on design, 3D models generated form CAD software are print directly by avoiding other process related to traditional manufacturing. The rise of new technologies in digital manufacturing releases new opportunities for companies to foster productivity, customization and sustainability.
- Structural optimisation for medical implants through additive manufacturingPublication . Al-Tamimi, Abdulsalam Abdulaziz; Almeida, Henrique; Bártolo, PauloAdvanced manufacturing techniques are being explored to fabricate degradable and non-degradable, porous or non-porous implants for medical applications. These implants have been designed using standard computer-aided design (CAD) and computer-aided engineering (CAE) tools and produced in a multitude of materials. The recent use of optimisation tech niques, mainly topology optimisation, allows the development of additive manufactured medical devices with improved performance. This review discusses the combined use of optimisation techniques and additive manufacturing to produce biocompatible and biodegradable scafolds for tissue engineering with improved mechanical and permeability properties; metallic lattice structures with reduced weight and minimal stress shielding efect; and lightweight personalised orthopae dic implants. Three optimisation routes are considered: topology optimisation; triply periodic minimal surfaces that can be manipulated by means of the equations parameters to optimise the overall performance; and the use of repetitive structures that are optimised as unit cells under certain conditions to compose a bulk object. Major limitations and research challenges are highlighted and discussed.