Numerical and experimental analysis of a mine’s loader boom crack

• Autorzy: Rusiński E. , Czmochowski J. , Moczko P.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The main purposes of the paper are to discuss designing problems of machines used in underground mining and investigation of its reasons based on cracked boom of underground mine machine. Design/methodology/approach: Numerical and experimental approach was considered. The finite element method was used for numerical simulation. Fractographic and microscopic evaluation, chemical analysis, hardness tests were used to perform material evaluations. The objectives are achieved by numerical simulation of cracked loader boom, material evaluations of specimens and comparison of results achieved from both approaches. These were determined through a numerical experiment, based on a discrete model of the jib boom and predefined boundary conditions. The finite element analysis for the jib boom provided information about stress distribution for extreme load conditions. The study included macroscopic and fractographic inspection, microscopic evaluation as well as hardness tests of the material used for the jib boom. Conclusions from both approaches were drawn then. Findings: The causes of damage of a loader jib boom used at an underground copper mine were found. Practical implications: The study provides practical implication into designing process of mentioned objects by wider view of relationships between theoretical design and manufacturing process. Originality/value: The paper provides information backed by evaluation and test results, stating the nexus of causes of the boom failure. The experimental and numerical approaches show relationship between designing and manufacturing process of machines. This can be helpful for the designers and researchers looking for reasons, methods of investigations or how to prevent failures of similar machines.

Słowa kluczowe

EN

CAD/CAM; materials; metallography

PL

CAD/CAM; materiały; metalografia

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2006
• Tom: Vol. 17, nr 1-2
• Strony: 273--276
• Opis fizyczny: Bibliogr. 11 poz., rys.

Twórcy

autor

Rusiński E.

• Institute of Machines Design and Operation, Wroclaw University of Technology, ul. Lukasiewicza 7/9 51-370 Wroclaw, Poland

autor

Czmochowski J.

• Institute of Machines Design and Operation, Wroclaw University of Technology, ul. Lukasiewicza 7/9 51-370 Wroclaw, Poland

autor

Moczko P.

• Institute of Machines Design and Operation, Wroclaw University of Technology, ul. Lukasiewicza 7/9 51-370 Wroclaw, Poland

Bibliografia

• [1] K. Pieczonka: Scoop Loaders (in Polish), Wrocáaw University of Technology Publishing House, Wrocław 1988.
• [2] T. Smolnicki, E. Rusiński, J. Czmochowski: Some aspects of load carying structures of mining machines, Mechanical Review, 1/2004 p. 32.
• [3] G. Wszołek: Vibration analysis of the excavator model in GRAFSIM program on the basis of a block diagram method. Journal of Materials Processing Technology 157/158 (2004) 268-273
• [4] A. Buchacz, A. Machura, M. Pasek, Hypergraphs in modelling and analysis of complex mechanical systems, Systems Analysis Modelling Simulation, (2003), Taylor & Francis, New York.
• [5] A. Krukowski, J. Tutaj: Deformational connections. National Scientific publications, 1987.
• [6] E. Rusiński, J. Czmochowski, T. Smolnicki: Advanced Finite Element Method for Load-carrying Structures of Machines (in Polish), Wrocław University of Technology Publishing House, Wroclaw 2000.
• [7] E. Rusiński: Finite Element Method; System COSMOS/M” (in Polish), WKŁ, Warsaw 1994
• [8] O.C. Zienkiewicz, R.L. Taylor: The finite element method. Vol. 1, Vol. 2. McGraw-Hill Bool Company, London 1991.
• [9] E. Rusiński, K. Kanczewski, P. Moczko, W. Dudziński, M. Lachowicz: Determination of causes of fracture of loader jib boom ŁK-2NCC. Report No. S-019/2005, Institute of Machine Design and Operation at the Wrocław University of Technology.
• [10] Structural Dynamic Research Corporation: Exploring I-DEAS Design.
• [11] W. Dudziński and others: Structural materials in machines design, Wrocław University of Technology Publishing House, Wrocław 1994.