The degradation of equipment used in production platforms operating in a maritime environment occurs, in most cases, by corrosion defects. High to low pressure separators remain operational but suffer from a progressive reduction of wall thickness by external corrosion. Repair techniques for tubes and pressure vessels using laminate composite material are widely known and already defined by technical standards. However, there are doubts regarding the effectiveness of these repairs when performed near openings, nozzles or other stress concentrators. The objective of the present work is to verify the efficiency of the composite repair and the influence of the defect thickness. To meet these objectives, four vessels were tested until burst. The results showed that composite repair was efficient since the burst pressure of the repaired vessel was considerably higher than its limit pressure without repair.
RESUMO -O b j e t i v o:A via piramidal foi identificada e descrita em 1852, pelo neurologista vienense Ludwing Türck, q u e assim a denominou em decorrência das pro t u b e r â ncias que a mesma forma na região ventral do bulb o 1 . O trato piramidal é a única via central conhecida cuja lesão ou disfunção ocasiona o desaparecimento do reflexo cutâneo plantar normal e o s u rg imento da resposta extensora 2 . No dia 22 de fevere i ro de 1896, Joseph François Félix Babinski (1857-1932, num texto com apenas vinte e oito linhas 3 , apresentou a Société Biologique de Paris o que veio tornar-se o sinal de maior impacto na semiologia neurológica. Babinski re l acionou o fenômeno à doença orgânica do sistema n e rvoso central e através de um estímulo da re g i ã o p l a n t a r, gravou definitivamente seu nome na histó-ria da Neurologia. No dia 20 de maio de 1911 C h a r l e s Gilbert Chaddock (1861-1936) apresentou frente a St. Louis Neurological Association o sinal ao qual denominou "external malleolar sign", também e v idenciado nas lesões do sistema nervoso central e com, segundo o autor, algumas vantagens em re l a ç ã o ao sinal de Babinski 4 . O objetivo primário deste estudo foi verificar a p resença dos sinais de Babinski (SB) e de Chaddock (SC), estando a cabeça em três posições, em 100 pacientes sem queixas ou sintomas sugestivos de c o mp rometimento da via piramidal. Considerando que ambos os sinais se prestam para demonstrar disfunções das vias piramidais e que determinadas mano-
This paper is part of a research project that is concerned with the assessment of the efficiency of composite repair in corroded metallic pressure vessels. The focus is to evaluate localized repairs in corroded areas near nozzles. A numerical model was developed, and the results were validated against experimental tests. 50%, 70%, and 80% wall loss defects were manufactured into small-scale metallic vessels in two different positions and the failure pressure of the repaired vessels was determined using hydrostatic tests. The numerical results show that the failure pressure of the repaired vessel is close to the non-defective vessel, showing that the repair system was efficient.
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