A5043928025- Elasticity and Material Modeling
- Particle Detector Development and Performance
- Radiation Detection and Scintillator Technologies
- Neutrino Physics Research
- Nuclear Physics and Applications
- Astrophysics and Cosmic Phenomena
- Mechanical Engineering and Vibrations Research
- Dark Matter and Cosmic Phenomena
- Rheology and Fluid Dynamics Studies
- Probabilistic and Robust Engineering Design
- Advanced machining processes and optimization
- Automotive and Human Injury Biomechanics
- Contact Mechanics and Variational Inequalities
- Cellular and Composite Structures
- Tunneling and Rock Mechanics
- Cardiac Valve Diseases and Treatments
- Numerical methods in engineering
- Atomic and Subatomic Physics Research
- Thermoelastic and Magnetoelastic Phenomena
- Manufacturing Process and Optimization
- Medieval Architecture and Archaeology
- Bone Metabolism and Diseases
- Advanced Numerical Methods in Computational Mathematics
- Innovations in Concrete and Construction Materials
- Bone and Joint Diseases
Universidade de Vigo
2012-2024
Servicio Gallego de Salud
2021-2023
Galicia Sur Biomedical Foundation
2021
Universidad de Oviedo
2015
Next-generation megawatt-scale neutrino beams open the way to studying neutrino-nucleus scattering resorting, for first time, gaseous targets. This could lead deeper knowledge of cross sections in energy region between hundreds MeV and a few GeV, interest upcoming generation long-baseline oscillation experiments. The challenge is, therefore, accurately track (especially) time particles produced interactions large seamless volumes down few-MeV energies. We propose accomplish this through an...
This paper studies the stress state of a threaded fastening by using Finite Element (FE) models, applied to surgical screws in cortical bone. There is general interest studying states induced different elements joint caused thread contact. Analytical models were an initial approach, and later FE allowed detailed complex phenomena related these joints. Different have evaluated standard joints machinery structures, being symmetric. However, employ asymmetric geometry, selected improve level...
In this work, we study a bone remodeling model used to reproduce the phenomenon of osseointegration around endosseous implants. The biological problem is written in terms densities platelets, osteogenic cells, and osteoblasts concentrations two growth factors. Its variational formulation leads strongly coupled nonlinear system parabolic equations. An existence uniqueness result form stated. Then, fully discrete approximation introduced by using finite element method semi-implicit Euler...
In this paper, we characterized the hyperelastic and damage behavior of Extensor Digitorum Longus (EDL) human tendon under loading conditions. The study was conducted in both categories models, phenomenological physically motivated, to allow prediction macroscopic response specific conditions, assuming that its follows a anisotropic model conjunction with law. We benchmarked multiple models fit tendons uniaxial tensile by employing genetic algorithm, obtained material parameters for elastic...
Structural potting is used to prepare honeycomb panels fix metallic elements, typical in aircraft doors. In this paper, a full procedure for structural using robotic arms presented the first time. Automating requires integration of, first, machining operations remove skin layers and points and, then, resin injection into cells. The paper describes design, prototyping, testing of specific end-effectors. Different end-effectors were explored ensure efficient injection. results obtained with...
In this study, we have been working within the framework of mathematical characterization materials with complex behavior, and used as input data for simulations in finite elements codes. We researched behavior hyperelastic viscoelastic qualities. There are models type materials; however, they lean on parameters that to be previously determined each material, only then, their calculation can estimate an answer material under specific loading conditions. focused applying Prony series...
The split torque gearbox is a practical solution to the transmission of high torques with lowest possible weight. In this article, we perform mathematics necessary calculate solutions for simultaneous meshing four wheels on basis geometric conditioning factors. These calculations will be illustrated by numerical applications. Finally, particular cases planetary gearboxes and equal idler pinions are studied, conclusion that their application appropriate in specific conditions.
It is not uncommon to use profiles act as energy absorption parts in vehicle safety systems. This work analyses an impact attenuator based on a simple design and discusses the of thermoplastic material. We present mechanical test for prototype. develop simulation model using finite element method explicit dynamics, we evaluate most appropriate mesh size integration describing results. Finally, consider performance different materials, metallic ones (steel AISI 4310, Aluminium 5083-O) foam...
In this work we describe the mechanical design of a time-of-flight detector based on strip RPCs dedicated to measure relativistic heavy ions. The proposed includes innovative solutions which meet specific requirements with proposal is results previous R&D program build prototypes test designs, materials and construction solutions, complemented by tests ion beams. first module has been built be studied characterized under beam conditions.
Current knowledge of the behavior heavy quadricycles under impact is still very poor. One most significant causes lack energy absorption in vehicle frame or its steel chassis structure. For this reason, special steels (with yield stresses equal to greater than 350 MPa) are commonly used automotive industry due their great strain hardening properties along plastic zone, which allows good impact. This paper presents a proposal for quadricycle system meets percentages conventional vehicles...
Abstract Current anchorage systems for poles, lighting columns, etc., have an inherent strength that causes serious injuries, and even death, in cases of vehicle impact. This article explores the deficiency traditional explains development a new system over different phases, such as design conditions, FEM analysis, dynamic testing actual crash tests. The behaviour are compared, including use data acquisition high-speed camera. aim this study was to develop non-energy-absorbing system,...
Bone tissue is a material with complex structure and mechanical properties. Diseases or even normal repetitive loads may cause microfractures to appear in the bone structure, leading deterioration of its A better understanding this phenomenon will lead predictions fracture bone-implant performance. In work, model proposed by Frémond Nedjar 1996 (initially for concrete structures) numerically analyzed compared against specific García et al. 2009. The objective evaluate both models implemented...
Passive safety systems of cars include parts on the structure that, in event an impact, can absorb a large amount kinetic energy by deforming and crushing design-controlled way. One such absorber part, located front Formula Student car, was measured under impact test bench. The is modeled within Finite Element (FE) framework including weld characteristics failure description. continuous welding feature almost always disregarded included models. In this work, FE model fully defined to...
In this work we study a bone remodeling model for the evolution of myeloma disease. The biological problem is written as coupled nonlinear system consisting parabolic partial differential equations. They are in terms concentrations osteoblasts and osteoclasts, density relative concentration tumor cells. Then, deal with numerical analysis variational problem, introducing approximation by using finite element method hybrid combination both implicit explicit Euler schemes. We perform some...
There are many works dealing with the dynamics of bone remodeling, proposing increasingly complex and complete models. In recent years, efforts started to focus on developing models that not only reproduce temporal evolution, but also include spatial aspects this phenomenon. work, we propose extension an existing model includes osteocytes. The dependence is modeled in terms a linear diffusion, as proposed previous related problems. resulting then written its variational form, fully...
Transcatheter Aortic Valve Implantation (TAVI) or Replacement (TAVR) is a promising treatment for aortic valve stenosis, consisting of procedure to replace damaged native by bioprosthetic one. This replacement control the flow blood using leaflets that are similar ones valve. Commonly manufactured bovine porcine pericardium, it tissue histologically composed collagen fibers embedded into nearly-isotropic matrix, where their distribution makes pericardium behave as an anisotropic hyperelastic...
In this work, we numerically study a thermo-mechanical problem arising in poro-viscoelasticity with the type III thermal law. The thermomechanical model leads to linear system of three coupled hyperbolic partial differential equations, and its weak formulation as parabolic variational equations. Then, using finite element method implicit Euler scheme, for spatial approximation discretization time derivatives, respectively, fully discrete algorithm is introduced. A priori error estimates are...
Resistive-plate-chambers (RPCs) were proposed to be used build a time-of-flight detector for relativist heavy ions of the R3B-FAIR experiment, as well other applications. State-of-the-art reaction codes allow evaluating requirements detector. The specific needs that working with impose about material thicknesses are solved new design concepts. We built prototypes and investigated behaviour RPCs tested relativistic ions. measured efficiency streamer presence atomic numbers up 38. Electron...