A5006200244- Metal Forming Simulation Techniques
- Metallurgy and Material Forming
- Microstructure and Mechanical Properties of Steels
- Microstructure and mechanical properties
- Metal Alloys Wear and Properties
- Magnetic confinement fusion research
- Laser and Thermal Forming Techniques
- Fusion materials and technologies
- Material Properties and Processing
- Dental materials and restorations
- Dental Implant Techniques and Outcomes
- Bone Tissue Engineering Materials
- Advanced Surface Polishing Techniques
- Welding Techniques and Residual Stresses
- Textile materials and evaluations
- Corrosion Behavior and Inhibition
- Polymer crystallization and properties
- Metallurgical Processes and Thermodynamics
- Nuclear reactor physics and engineering
- Polymer Nanocomposites and Properties
- Linguistics and Education Research
- Material Selection and Properties
- Structural Load-Bearing Analysis
- Mechanical Behavior of Composites
- Advanced Welding Techniques Analysis
Universidade Federal Fluminense
2016-2025
Culham Science Centre
2007-2024
United Kingdom Atomic Energy Authority
2022-2024
Centro Universitário de Volta Redonda
2004-2022
Royal Military Academy
2020
Instituto Politécnico Nacional
2015
University of Lisbon
2010
Culham Centre for Fusion Energy
2007
Centre National de la Recherche Scientifique
2000-2003
Type-I edge-localized modes (ELMs) have been mitigated at the JET tokamak using a static external $n=1$ perturbation field generated by four error correction coils located far from plasma. During application of ELM frequency increased factor 4 and amplitude ${\mathrm{D}}_{\ensuremath{\alpha}}$ signal decreased. The energy loss per normalized to total stored energy, $\ensuremath{\Delta}W/W$, dropped values below 2%. Transport analyses shows no or only moderate (up 20%) degradation confinement...
Recent experiments on JET have shown that type-I edge localized modes (ELMs) can be controlled by the application of static low n = 1 external magnetic perturbation fields produced four error field correction coils (EFCC) mounted far away from plasma between transformer limbs. When an with amplitude a few mT at (the normalized poloidal flux, ?, is larger than 0.95) applied during stationary phase ELMy H-mode plasma, ELM frequency rises ~30?Hz up to ~120?Hz. The energy loss per total stored...
Background/Objectives: High-translucency zirconia is a dental ceramic offering excellent aesthetic results but with mechanical limitations restricting its applications. This study aimed to simulate the behavior of anatomical prostheses made from high-translucency using finite element method (FEM) assess material’s reliability. Methods: Samples were compacted, sintered, and characterized for relative density. Structural microstructural analyses performed X-ray diffraction (XRD) scanning...
In this work, the damage behavior of cold-rolled zinc-coated dual-phase steel sheets 600 and 800 grades was evaluated by means standard uniaxial tensile testing, microstructural characterization finite element modeling. The void formation in both steels investigated as a function plastic strain level from digital image processing scanning electron micrographs to quantify average size determine corresponding measures density, area fraction aspect ratio. Based on analysis experimental test...
The operational domain for active control of type-I edge localized modes (ELMs) with an n = 1 external magnetic perturbation field induced by the ex-vessel error correction coils on JET has been developed towards more ITER-relevant regimes high plasma triangularity, up to 0.45, normalized beta, 3.0, current 2.0 MA and q95 varied between 3.0 4.8. results ELM mitigation in triangularity plasmas show that frequency ELMs increased a factor 4 during application fields, while energy loss per ELM,...
The third generation of advanced high-strength steels (AHSS) brought attention to the steel and automotive industries due its good compromise between formability production costs. This work evaluated a third-generation AHSS (USS CR980XG3TM) through microstructural X-ray diffraction (XRD) analyses, uniaxial tensile plane-strain tension testing, numerical simulations. damage behavior this is described with Gurson–Tvergaard–Needleman (GTN) model using an identification procedure based on...
The automotive industry has experienced rapid growth, with lightweight materials becoming a significant research focus. Among these materials, low-density Fe-Mn-Al-C alloys show promise for this kind of application. To optimize the hot workability parameters practical applications, it is essential to explore deformation behavior alloys. In study, we investigated alloy Fe-0.77Mn-7.10Al-0.45C-0.31Nb using plane-strain compression tests several temperatures (850, 950, 1050, and 1150 °C) nominal...
In the last years, press-hardening steels have contributed to automotive industry successfully meet increasing regulations for reducing fuel consumption and stringent greenhouse gas emissions while improving passenger safety by manufacturing lightweight car body parts. Zn-Fe coating is an alternative prevent corrosion or even enhance resistance in these steels. However, prone liquid melting embrittlement (LME) during hot forming process. To LME, must be fully transformed into a solid...
Precipitation of the intermetallic phases embrittles duplex stainless steels. Currently, most studies in this subject simulated aging phenomena by first holding material at different isothermal conditions and then, quenching down under high cooling rates to investigate subsequent microstructures mechanical properties. In work, specimens steel UNS S31803 were submitted cycles controlled non-isothermal conditions. The volume fraction sigma chi formed was less than 1%. value lower that assumed...
In this work, composites of recycled polyethylene terephthalate (PET-r) and organoclay Cloisite 15A (C15A) were strategically obtained by the intercalation method in molten state. The synergistic effect C15A with PET matrix was evaluated using different concentrations (1, 3, 5, 7% wt). influence on rheological thermal properties investigated corroborated morphological observations. Both X-ray diffraction results scanning electron microscopy analysis revealed that PET-r present a high degree...
In this work, the formability of a hot-dip galvanized interstitial-free (IF) steel sheet was evaluated by means uniaxial tensile and Forming Limit Curve (FLC) tests. The FLC defined using flat-bottomed Marciniak's punch technique, where strain analysis made digital image correlation software. A plastic localization model also proposed wherein governing equations are solved with help Newton's method. investigated IF presented very good level in deep-drawing range consistent measured Lankford...
The material characterization regarding sheet metal formability is usually assessed by the forming limit curve (FLC). FLC requires specialized and expensive equipment, several samples with different geometries, can be a very time-consuming procedure for data treatment. Alternatively, hole expansion test (HET) Erichsen Cupping Test (ECT) used routine evaluations of mechanical behavior. These tests require fewer quantities easy specimen preparation fast analysis results. HET ECT procedures...