Maria Goreti Fernandes

This paper presents the role of FabLabs in the Portuguese footwear and metal industrial sectors, regarding the use of new and disruptive technologies and processes at industrial scale, aiming for the digitalization of the industry. MetalShoe FabLab Network is a project intending to provide a physical space and, at the same time, offering knowledge for experimentation, demonstration, validation, and human resources training regarding digital manufacturing technologies, with focus in the industrial implementation. For that, a survey was conducted among industrials from both sectors to understand the needs and expectations regarding these types of technologies. Digitalization, automation and robotics, additive manufacturing and digital marketing were the ones selected as the technologies not yet integrated and that would bring value to the companies, while the companies want to learn more about digitalization, additive manufacturing & 3D Printing and IoT, these being similarly chosen, and automation and robotics following closely behind. In this sense, the outputs of the projects were technical referential about each technology, guides for applications of the technologies, workshops, technical sessions and demonstration actions. In the end, it is expected that Portuguese companies from both sectors would recognize the potential of digital manufacturing technologies and incorporate those that provide the most value to each entity.

Digital Transformation, as well as the need of better technical knowledge of the DSOs Assets, justify the efforts that companies carry out to get solutions to retrieve on time information about the condition of their assets and allow to take justified decisions either to rehabilitate or replace them. E-REDES (Portuguese DSO) has developed a project, designed as a Digital Boost and named Analytics for Assets – A4A, to calculate the Health Index and Probability of Failure for some HV assets, namely: HV Overhead Line, HV Circuit Breakers and Power Transformers. Results regarding Power Transformers health index, calculated using CNAIM methodology, will be shared in this paper.

The purpose of this work is to study the effect of cracks on the behavior of SIF (KI) in single edge crack of a bi-material interface, as metal-ceramic dental application. Metals, alloys, ceramics and others materials have been used in dentistry as restorative materials. However, a challenging aspect in ceramic materials is their restricted loading capability due to the low fracture toughness. In this work, the finite element method was used to evaluate the SIFs and to model a single edge crack in a metal (NiCr) and ceramic (KKM95-VITA) model subjected mode I loading.

Drilling is one of the most common processes involved in different cutting operations and may affect the mechanical properties of the workpiece by creating residual stresses around the opened hole and highly stressed on the newly formed surface. Nevertheless, when it comes to the living tissues, drilling assumes more attention to guarantee a non-invasive procedure. Drilling of bone is common in orthopaedic surgical process, to produce a hole to screw insertion to fix the fractured members for immobilization, or even in dental implant interventions. This work describes a conventional drilling process performed on solid rigid polyurethane foams blocks with similar mechanical properties to the human bone. A dynamic and numerical study was conducted to evaluate the use of different drill diameters (4, 5 and 6mm) on the stresses generated during the process. Different simulations using an explicit dynamic program were performed to assess the level of stresses and the damage effect on the polyurethane foam structure. This program is based on the finite element method and incorporates the dynamic characteristics involved in the drilling process. The main objective of this study is to verify the combination between some drill parameters, that reduce the mechanical damage produced by high stress level during bone drilling. The results permit to assess the influence of the drill bit diameter using a constant feed-rate (75mm/min) and drill speed (600rpm). For these conditions, results show that the smaller drill bit diameter leads to a decrease in the stress level in the foam material during the process.

DYNAMIC NUMERICAL SIMULATION OF DIFFERENT DRILL BIT DIAMETER ON THE POLYURETHANE FOAMS DRILLING