Research on Weld Defects Simulation and Performance Assessment of Solid-Web Type Telescopic Jib

Abstract:

To research the failure mode of solid-web type telescopic jib typical weld, extract and quantify failure characteristics, obtain failure regularity of jib performance and solve the problem that welds do not be established by conventional finite element analysis. The weld strength is replaced by the maximum stress of the corresponding section, which may cause the simulation results low and distortion, and cannot simulate weld defects. A new modeling method is used by this article, which establishes and simplifies the weld physical shape, simulate and analyze weld strength. The Life and Death element technology which is based on the ANSYS software is used to simulate weld defects. The weld strength that is obtained by conventional analysis simulation is 110MPa, after processing, stress of weld model without defects is 395MPa, the theoretical value be calculated is 437MPa, stress of weld model with defect 1, 2, 3 respectively is 586MPa, 402MPa and 475MPa. Through comparing the simulation value and the theoretical value and the comparison between the simulation values, the simplified model that is proved is reasonable, the technical route which is used to simulate weld defect by Life and death element technology is feasible. It can be used to predict failure critical value under typical working condition, assess whether the weld failure. The working condition of jib can be simulated, and the main factors can be retrospect.

• Periodical: Applied Mechanics and Materials (Volumes 687-691)
• Pages: 236-242
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.687-691.236
• Online since: November 2014
• Authors: Ge Ning Xu, Kai Hao
• Keywords: Death Element Technology, Defect, Finite Element Analysis (FEA), Life Element Technology, Weld

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