Mechanical Models
Mostrando 1-12 de 381 artigos, teses e dissertações.
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1. Mesh reinforcement in masonry mortar coatings: a systematic literature review
Abstract Mortar coatings have a major influence on a building’s aesthetics, valorization, and habitability, with significant effects on the mechanical behavior of masonry walls. Multiple types of meshes can be embedded in plaster to enhance both masonry and coating’s mechanical behavior, restrain crack formation, enhance the bonding between layers, and i
Cerâmica. Publicado em: 2023
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2. Finite element computational development for thermo-mechanical analysis of plane steel structures exposed to fire
Abstract This article presents a numerical formulation based on finite element procedures for application in nonlinear thermo-mechanical analyses of steel planar structures under fire condition. The mechanical properties of structural elements degrade when subjected to high temperatures, resulting in significant reductions in strength and stiffness. Under th
REM - International Engineering Journal. Publicado em: 2022
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3. Gas permeability and compressive strength evaluation of porous Al2O3 supported membrane
Abstract The aim was to investigate the feasibility of using a device to characterize permeability in porous substrates with low gas flux. Al2O3 supports were prepared by dry pressing using 1 to 3 wt% of polyethylene glycol (PEG) as a pore-forming agent. The green body was partially sintered at 1300 ºC. CO2 gas was used to measure both the pressure loss and
Cerâmica. Publicado em: 2022
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4. ROTAXANOS - INTERAÇÕES INTERCOMPONENTES E MOVIMENTOS MOLECULARES
Rotaxanes are currently one of the most promising objects of study in the field of artificial molecular machines. A rotaxane molecule is composed by two or more molecular components that are connected by a mechanical bond. 51 years ago, the first synthesis of this type of molecules was performed, since then, there has been a great effort in obtaining new mod
Quím. Nova. Publicado em: 2021-01
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5. Brazilian Single-Center Experience with Aortic Root Replacement in 448 Patients: What Is the Best Technique?
Abstract Introduction: The objective of this study was to evaluate whether a surgery with the use of valved conduit is capable of leading to better immediate and late results than those obtained by the valve-sparing aortic root reconstruction technique. Methods: Between January 2002 and June 2016, 448 patients underwent aortic root reconstruction. These we
Braz. J. Cardiovasc. Surg.. Publicado em: 2020-12
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6. Healing effects of natural latex serum 1% from Hevea brasiliensis in an experimental skin abrasion wound model,
Abstract Background Dermabrasion is related with mechanical and surgical traumas on the skin; usually topical antiseptics and/or saline have been used for healing. Natural products for wound healing can also be used for abrasions, such as latex from Hevea brasiliensis. Objective This study aimed to evaluate the in vitro viability and migratory/proliferativ
An. Bras. Dermatol.. Publicado em: 2020-08
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7. THEORETICAL UNDERSTANDING OF MORPHOLOGICAL DISTRIBUTION OF HYDROGEN IN AMORPHOUS CALCIUM SILICATE HYDRATE
Determining the morphological distribution of hydrogen atoms in calcium silicate hydrate phase (C-S-H) is of great concern but challenging. In this work, based on the stoichiometric composition of (CaO)1.7(SiO2)(H2O)1.8, a series of amorphous Ca1.7•Si•(O)3.7-x•(OH)2x•(H2O)1.8-x models are constructed using Monte Carlo method, where x represents the m
Quím. Nova. Publicado em: 20/07/2020
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8. ESTIMATION OF WOOD TOUGHNESS IN BRAZILIAN TROPICAL TREE SPECIES
ABSTRACT Wood has been used for several purposes such as in civil and rural construction. Knowing wood mechanical behavior under short-term loading is essential for safer structural designs. However, wood toughness is a mechanical property little investigated for this purpose. Thus, this study aimed to evaluate, using exponential and polynomial regression mo
Eng. Agríc.. Publicado em: 2020-04
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9. INFLUENCE OF DIFFERENT TEMPERATURES AND AIRFLOWS ON DRYING OF NATURAL AND PULPED COFFEE
ABSTRACT This study aimed to evaluate drying kinetics for natural and pulped coffee, using different temperatures and drying airflows. For the conduction of the experiment, coffee fruits (Coffea arabica L. cv. Topázio) were harvested manually, selecting only ripe fruits and subsequent to the hydraulic separation. For drying the coffee, use a mechanical drye
Eng. Agríc.. Publicado em: 2020-04
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10. Características e preditores de doença crítica crônica na unidade de terapia intensiva
RESUMO Objetivo: Caracterizar os pacientes com doença crítica crônica e identificar os preditores relacionados à evolução para doença crítica crônica. Métodos: Coleta prospectiva de dados por 1 ano realizada na unidade de terapia intensiva de um hospital geral localizado na Região Sul do país. Construíram-se três modelos de regressão logíst
Rev. bras. ter. intensiva. Publicado em: 20/01/2020
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11. Os modelos no Ensino de Ciências: Reações de estudantes ao utilizar um objeto-modelo mecânico concreto analógico didático (OMMCAD)
Resumo Neste manuscrito apresentamos a noção de objeto-modelo mecânico concreto analógico didático (OMMCAD), um tipo de modelo didático nascido na fusão da epistemologia Bungeana dos modelos (modelos científicos) com a didática das ciências (modelos didáticos), desenvolvido para fins de ensino-aprendizagem da temática astronômica do a) movimento
Rev. Bras. Ensino Fís.. Publicado em: 10/01/2020
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12. Delay of neuropathic pain sensitization after application of dexamethasone-loaded implant in sciatic nerve-injured rats
Neuroimmune interactions underlying the development of pain sensitization in models of neuropathic pain have been widely studied. In this study, we evaluated the development of allodynia and its reduction associated with peripheral antineuroinflammatory effects induced by a dexamethasone-loaded biodegradable implant. Chronic constriction injury (CCI) of the
Braz. J. Pharm. Sci.. Publicado em: 20/12/2019