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Case Study Of An Evaluation Of A Stacker Boom Luffing Pulley By Irwin's Model And Under Bs 7910 Guidance

By Martins J.A., KoZvesdy I., Romao E.C. and Ferreira I.

Abstract

A case study on evaluation of a heavy-duty Stacker Boom Luffing Pulley was presented. Irwin's fracture toughness method and the British Standard were used to help in the decision-making process. Using inspection, discontinuities were found at the first look in the cylinder cross-section at the region of welding of the cylinder ends. A more detailed analysis was conducted by ultrasonic mapping, crossing the cylinder transverse thickness and longitudinal to its length. The final decision took into account accurate analysis of the stress o 1 (Principal Stress) from Finite Element Method (FEM) and o ref based on British Standard, and comparing the defect real size and the critical crack size calculated by Irwin equation. Copyright © 2011 nderscience Enterprises Ltd.34267277(2000) Steel - Determination of Content of Non-metallic Inclusions - Micrographic Method, , ABNT NBR 88(2007) Standard Specification for Straight-beam Ultrasonic Examination of Plain and Clad Steel Plates for Special Applications, , ASTM A578/578M(2006) An American National Standard-Structural Welding Code - Steel - American Welding Society AWW, ANSI Approved, , AWS D1.1/D1.1M(2005) Guidance on Methods for Assessing the Acceptability of Flaws in Fusion Welded Structures, , British Standard BS 7910, London, British Standard Institution (BSI), 2005, ISBN 978-0-580 - 601080-8Dieter, G.E., (1988) Mechanical Metallurgy, pp. 241-272. , McGraw-Hill Book Company, LondonGiacagila, G.E.O., (1982) Mecânica Geral, , 10a edição revisada, Rio de Janeiro, Editora CampusGomes, A.C., Caltabelotti, O., Ricardo, O.G.S., Silva, P.S.C.P., Metalografia e análise de falhas: casos selecionados (1933-2003) (1981) Exame Preliminar de Uma Ponte Pênsil, , Azevedo, C.R.F., Gescon, T. (Eds.) , São Paulo, Instituto de Pesquisas Tecnológicas, Azevedo, (Publicação IPT2996), ISBN 85-09-00132-4Grove, W.G., Steinman, D.B., The eyebar cable suspension bridge at Florianópolis - Brazil (1928) Transaction of the American Society of Civil Engineers, 92, p. 266Hertzberg, R.W., (1996) Deformation and Fracture Mechanics of Materials of Engineering Materials, pp. 315-402. , John Wiley & Sons, Inc., United States of America(2010) Modeling and FEA Manual, , Inventor professionalIrwin, G., Analysis of stresses and strains near the end of a crack traversing a plate (1957) Journal of Applied Mechanics, 24, pp. 361-364Steinman, D.B., (1929) Suspension Bridges, , John Wiley, New York(2011), http://eng.usiminas.com/irj/portal, Usiminas Steels Catalogu

Year: 2015
DOI identifier: 10.1504/IJMME.2011.045469
OAI identifier: oai:repositorio.unicamp.br:REPOSIP/108017
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