Improved extrapolation method for the fatigue damage of bus structural steel under service loading

다국어 초록 (Multilingual Abstract)

This paper shows a technical study and analysis of the fatigue damage assessment of bus structural steel under service loading. Two bus prototypes (passenger-loaded and empty) are used in the experimental measurement for a typical city road. A deterministic analysis is performed for fatigue damage assessment and the remaining strength. These parameters are used for the construction of fatigue design curves, which can predict the designed fatigue life to failure. Results show a promising prediction that can be used for best practice in future design. To complete the investigation, this work also examined the different perspectives of system failure on the basis of the probability of fatigue life in the form of a distribution function. All results are satisfactory from the analysis perspective. However, design improvement should be addressed to achieve the target life.

참고문헌 (Reference)

1 P. Sundell, "Statistical evaluation of chassis load variations for heavy trucks" 8 : 761-767, 2011

2 R. T. Dewa, "Statistical approaches on the design of fatigue stress spectra for bus structures" 1 : 1360-, 2019

3 S. P. Zhu, "Probabilistic modelling of damage accumulation for fatigue reliability analysis" 4 : 3-10, 2017

4 "GlyphWorks Software" HBM Prenscia

5 I. M. W. Ekaputra, "Fatigue strength analysis of S34MnV steel by accelerated staircase test" 10 (10): 394-400, 2020

6 A. Khalfallah, "Experimental and numerical assessment of mechanical properties of welded tubes for hydroforming" 56 : 782-790, 2014

7 M. Kepka, "Deterministic and probabilistic fatigue life calculations of a damaged welded joint in the construction of the trolleybus rear axle" 93 : 257-267, 2018

8 "BS 7608:1993, Code of Practice for Fatigue Design and Assessment of Steel Structures"

9 X. Chen, "An investigation on residual strength and failure probability prediction for plain weave composite under random fatigue loading" 120 : 267-282, 2019

10 M. Kepka, "Accelerated fatigue testing on special tracks as new part of methodology for bus/trolleybus development" 118 : 104786-, 2020

11 J. Wang, "A review of the extrapolation method in load spectrum compiling" 62 (62): 60-75, 2016

12 Qiang Ma, "A method of determining test load for full-scale wind turbine blade fatigue tests" 대한기계학회 32 (32): 5097-5104, 2018