Mechanical Impacts
Mostrando 1-12 de 57 artigos, teses e dissertações.
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1. Fuzzy Boundary for Beams Vibrations in Vehicles
ABSTRACT This work aims to study the transversal motion of a car’s chassis, modeled by a beam and supported at its ends by two sets of spring-damper elements. A finite differences method is utilized along with Robin boundary conditions to solve the mathematical modeling. The constants of the boundary conditions are modeled by a fuzzy parameter obtained thr
Trends in Computational and Applied Mathematics. Publicado em: 2022
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2. Effects of the addition of graphene on the compressive strength of geopolymeric mortar developed from k-feldspar mining waste
Abstract Contemporary organizations are showing a growing interest in the reuse of solid waste from industrial processes with the intention of reducing environmental impacts and reducing costs. The mining activity is one of the main waste generators in Brazil. In parallel, geopolymeric materials have been gaining prominence in studies that make it a possible
REM, Int. Eng. J.. Publicado em: 2021-09
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3. Silicon carbide hollow fiber membranes developed for the textile industry wastewater treatment
Abstract In order to reduce the impacts of the industrial effluent on the environment, silicon carbide hollow fiber membranes were prepared by the precipitation-immersion technique and sintered at 1450 and 1500 °C. The membranes were characterized by X-ray diffraction, their surface structure was characterized by scanning electron microscopy and atomic forc
Cerâmica. Publicado em: 2021-06
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4. Quality of tomatoes under different transportation conditions by principal component analysis
ABSTRACT Bulk transportation of tomatoes is a step with high occurrence of mechanical impacts, leading to increased losses and reduction in the quality of fruits arriving at the industry and reaching the consumer market. The present study aimed to evaluate variations in physical-chemical parameters associated with the quality of tomato fruits, occurred durin
Rev. Ceres. Publicado em: 2020-12
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5. Traqueobronquite associada à ventilação mecânica: uma atualização
RESUMO As infecções do trato respiratório inferior associadas à ventilação mecânica são uma das complicações mais frequentes em pacientes em ventilação mecânica. Há muitos anos, a traqueobronquite associada à ventilação mecânica tem sido considerada uma doença que não demanda antibioticoterapia. Na última década, diversos estudos demons
Rev. bras. ter. intensiva. Publicado em: 20/01/2020
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6. Soil physical properties and soil organic carbon content in northeast Brazil: long-term tillage systems effects
ABSTRACT Concerns about the negative effects of agriculture on soil physical quality and soil organic carbon (SOC) pools have spurred on the adoption of conservation tillage systems in tropical regions. This study aimed to evaluate the long-term impacts (16th year) of conventional (CT), minimum (MT) and no-tillage (NT) practices and different cover crops (su
Sci. agric. (Piracicaba, Braz.). Publicado em: 04/11/2019
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7. Influência da composição granulométrica das partículas de resíduos de madeira nas propriedades de compósitos minerais: parte 2: gesso-madeira
Resumo Resíduos de construção e demolição (RCD) de madeira podem ser incorporados em compósitos de fibras naturais, reduzindo os impactos ambientais, o que contribui para o desenvolvimento de materiais, produtos e processos mais sustentáveis. Nesse sentido, o objetivo deste estudo foi avaliar a influência da composição granulométrica das partícul
Ambient. constr.. Publicado em: 03/10/2019
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8. Evaluation of Mechanical Properties of Sealing Mortar with Partial Replacement of Portland Cement by Stone Crusher Waste
Civil construction is one segment responsible for major environmental and social impacts. Among its raw materials, Portland cement, which is produced by the burning and subsequent grinding of a composition of clays and limestones. This manufacturing process causes great environmental damage, both by the exploitation of deposits and by the process of clinkeri
Mat. Res.. Publicado em: 23/09/2019
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9. Effects of Heat Treatment on the Relative Amounts of Cellulose in Nanosilver-Impregnated and Untreated Poplar Wood (Populus alba)
ABSTRACT The present study investigated the effect of heat treatment on the relative amount of cellulose in untreated and nanosilver-impregnated poplar wood (Populus alba). The impacts on physical and mechanical properties were further studied. Specimens were heated at 145°C and 165°C in hot air medium. In order to enhance heat transfer to the inner parts
Floresta Ambient.. Publicado em: 29/07/2019
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10. Valorização de resíduos de ágata em argamassas e concretos: avaliação do ciclo de vida
RESUMO O uso de resíduos oriundos do processo de beneficiamento de ágata (pó de ágata) em argamassas e concretos de cimento Portland é viável tecnicamente por suas propriedades mecânicas e de durabilidade. Porém, não existem pesquisas que avaliem o perfil ambiental dos materiais produzidos. O presente estudo visa avaliar os impactos ambientais poten
Matéria (Rio J.). Publicado em: 10/06/2019
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11. Sorbent system based on acetylated microfibrillated cellulose for remediation of oil aquatic environments
ABSTRACT The growth of oil exploration and transport in marine environments brings concern over potential environmental disasters caused by oil spills. Thus, various materials are being developed and studied in order to minimize environmental impacts caused by these oil spills. Among these materials, the use of sorbents has appeared as a great potential tech
Matéria (Rio J.). Publicado em: 10/06/2019
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12. Efeitos do uso de areia de praia nas propriedades de argamassas mistas: análise da variação granulométrica
RESUMO Devido ao alto consumo de areia de rio na construção civil e sua extração abusiva, cujos resultados são a geração de diversos impactos ambientais, este estudo analisa a influência da utilização de areia de praia em substituição à areia proveniente de leito de rio na produção de argamassas de revestimento. A partir da areia de rio, foram
Matéria (Rio J.). Publicado em: 10/06/2019