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View article: Study of Additive Manufacturing Intrinsic Defects on Fatigue Life of Ti-6Al-4V
Study of Additive Manufacturing Intrinsic Defects on Fatigue Life of Ti-6Al-4V Open
The present work presents a new approach to studying the structural integrity of a Ti-6Al-4V alloy obtained by Selective Laser Melting (SLM). This approach is based on the intrinsic addictive manufacturing defects analysis obtained by nano…
View article: Dynamic Maintenance based on Fuzzy Logic
Dynamic Maintenance based on Fuzzy Logic Open
Currently, certain maritime assets face the challenge of optimizing their performance despite limited resources. They aim to minimize intervention actions on equipment while maintaining safety standards and acceptable performance levels. S…
View article: 3D crack propagation study of a railway component using XFEM method
3D crack propagation study of a railway component using XFEM method Open
This work develops a methodology to study the crack propagation through ABAQUS simulation. This simulation study uses the service condition of the mechanical component and the complex geometry of a manufacturing defect obtained by microtom…
View article: Development of a Life Prediction Model of Ti-6Al-4V obtained by Additive Manufacturing
Development of a Life Prediction Model of Ti-6Al-4V obtained by Additive Manufacturing Open
The present study aimed to develop a new life prediction model of a Ti-6Al-4V alloy obtained by additive manufacturing (AM). The Selective Laser Melting (SLM) method was used to obtain specimens. This study contemplates four phases. The fi…
View article: Adapted FMECA for Supporting Maintenance Actions
Adapted FMECA for Supporting Maintenance Actions Open
In a Navy ship the knowledge of the equipment’s and systems state are a pillar and a necessity for operation success. Nowadays equipment’s are monitored with multiple sensors, and data are storage and processed through automatic systems. H…
View article: Study of extended and generalised finite element methods in 2D and 3D applied to a single edge notched bending test
Study of extended and generalised finite element methods in 2D and 3D applied to a single edge notched bending test Open
This work used the ABAQUS software to determine the Stress Intensity Factor (SIF), and J Integral solutions using single edge notched bending test and the crack propagation. These tests were based on the experimental single-edge notched be…
View article: Updating the FMEA Approach with Mitigation Assessment Capabilities—A Case Study of Aircraft Maintenance Repairs
Updating the FMEA Approach with Mitigation Assessment Capabilities—A Case Study of Aircraft Maintenance Repairs Open
This paper proposes a qualitative model to overcome the limitations of conventional failure mode and effects analysis (FMEA), which does not consider risk mitigation capabilities when prioritizing risks. Failure to consider these capabilit…
View article: Copper/Stainless Steel Friction Stir Spot Welds—Feasibility and Microstructural Analysis
Copper/Stainless Steel Friction Stir Spot Welds—Feasibility and Microstructural Analysis Open
The possibility of using solid-state joining technologies, such as friction stir welding (FSW) and its variants, to perform dissimilar joints is one of the well know advantages of this class of processes, namely because they are impossible…
View article: POS-928 EFFICACY OF THE PFIZER/ BNT162b2 COVID-19 VACCINE IN PERITONEAL DIALYSIS PATIENTS
POS-928 EFFICACY OF THE PFIZER/ BNT162b2 COVID-19 VACCINE IN PERITONEAL DIALYSIS PATIENTS Open
Patients with end-stage renal disease have an increased risk of severe disease when infected with severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2). Effective vaccination is essential to minimize the consequences of COVID-19 in …
View article: POS-940 ANTIBODY RESPONSE TO PFIZER BNT162b2 VACCINE IN HEMODIALYSIS PATIENTS: THE PREVIOUS SARS-CoV-2 INFECTION INFLUENCE
POS-940 ANTIBODY RESPONSE TO PFIZER BNT162b2 VACCINE IN HEMODIALYSIS PATIENTS: THE PREVIOUS SARS-CoV-2 INFECTION INFLUENCE Open
Several studies suggest that hemodialysis (HD) patients are more susceptible to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. Vaccination seems to be extremely important in these patients, however, some studies ha…
View article: Utilization of the Arena simulation software and Lean improvements in the management of metal surface treatment processes
Utilization of the Arena simulation software and Lean improvements in the management of metal surface treatment processes Open
For companies to stand out in increasingly competitive, dynamic and global markets, they must have customer satisfaction goals, create value through their processes, products and services and also aim for innovation. In this context, compu…
View article: Fatigue Limit Prediction Models of 6060 Aluminium Extruded Alloy
Fatigue Limit Prediction Models of 6060 Aluminium Extruded Alloy Open
The fatigue limit stress prediction models make it possible to determine the durability of metals, considering experimental fatigue tests, mechanical properties, hardness, manufacturing technology (namely through intrinsic defects in the p…
View article: A modified banding technique: experience of a center
A modified banding technique: experience of a center Open
Background: A well-functioning vascular access is vital to patients on regular hemodialysis. Banding the access is indicated in high-flow-associated steal syndrome. It allows for the reduction of access flow while maintaining distal limb p…
View article: An Uncertainties Simulation Model Applied to an Automated Laminar Flowmeter
An Uncertainties Simulation Model Applied to an Automated Laminar Flowmeter Open
Aircraft oxygen regulators are a normally used specialized test bench designed to perform tests to the regulators during its work conditions. The tests are performed placing the regulator in the barometric chamber, where low pressure condi…
View article: Structural integrity study of steel railway gearbox housing
Structural integrity study of steel railway gearbox housing Open
The present work presents a new approach to study the structural integrity of railway component. This railway component is a gearbox housing manufactured by welding, bending, and bolting in structural low carbon steel. During maintenance p…
View article: TRIZ and Lean Philosophies Applied Together in Management Activities
TRIZ and Lean Philosophies Applied Together in Management Activities Open
Purpose: In the current market, the Portuguese industry faces strong competition from countries with substantially lower operating costs. The agri-food industry is also subject to increasing competition, both nationally and internationally…
View article: The oncogenic effect of hepatitis C lasts beyond the disease’s eradication
The oncogenic effect of hepatitis C lasts beyond the disease’s eradication Open
Hepatitis C virus (HCV) is widely prevalent worldwide, with an estimated 180 million people infected. Its manifestations are not limited to hepatic disease, as it has widely known immunomodulator and oncogenic effects. Most HCV associated …
View article: Development Status of LASER Cladding and the New Metallic Alloys
Development Status of LASER Cladding and the New Metallic Alloys Open
LASER cladding is a technique which has as main purpose to improve mechanical properties of materials surface with the addition of thin layers of other materials. Cladding/coating/addition material can be transferred to the substrate by po…
View article: Diagnosis and treatment of haemodialysis vascular access problems without iodinated contrast: a single-centre experience
Diagnosis and treatment of haemodialysis vascular access problems without iodinated contrast: a single-centre experience Open
Introduction: The use of iodinated contrast angiography in the diagnostic and therapeutic approach to arteriovenous access (AVA) problems is limited by nephrotoxicity and allergic reactions. The use of alternatives such as CO2 or ultrasoun…
View article: Malabsorption syndrome as a rare cause of nephrocalcinosis
Malabsorption syndrome as a rare cause of nephrocalcinosis Open
Nephrocalcinosis is characterized by calcification of kidney parenchyma and can be caused by an increased amount of calcium, phosphate or oxalate in urinary excretion. We report a 35-year-old female with nephrocalcinosis. She had fitful st…
View article: Wear study of Innovative Ti-Ta alloys
Wear study of Innovative Ti-Ta alloys Open
In this paper a wear study of innovative Ti-Ta alloys is present. Samples of Ti-30%Ta, Ti-52%Ta, were produced by laser cladding. This technology uses a high power density generated by a laser beam to melt the base material and the filler …