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Research on Residual Fatigue Life Model for Lattice Boom of the Crane In-Service

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Abstract:

There were lots of distributed sources in the process of fatigue crack propagation of the lattice boom. Static evaluation of the reliability indicators couldnt be satisfied to solve practical engineering problems. The load and fatigue resistance were regarded as random processes and the fatigue failure of the randomness in a variety of factors, the concept of dynamic reliability of the weights index was proposed, models of dynamic reliability of the weights index were built based on the fatigue bearing capacity mode and limit damage degree mode. Fatigue stress experiments comparisons were done on a crawler crane according to the actual operating conditions with a K-type welded joints prototype. The results show that the dynamic reliability evaluation assessment model is more accurately in the fatigue life evaluation and the method can provide a new assessment method for engineering applications.

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Periodical:

Applied Mechanics and Materials (Volume 372)

Pages:

277-283

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.372.277

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Online since:

August 2013

Authors:

Fu Hai Cai, Fu Ling Zhao, Xin Wang, Li Ming Chen

Keywords:

Crawler Crane, Dynamic Reliability of the Weights Index, Lattice Boom Crack, Residual Fatigue Life

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© 2013 Trans Tech Publications Ltd. All Rights Reserved

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DOI: 10.1007/978-3-319-23757-2_8

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