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The Comparative Study of Fatigue Crack Propagation Experiment and Computer Simulation on the Component Materials for the Crane Life Remained
Sangyeol Kim1, Hyungsub Bae1, Myeongkwan Park1, Seongsoo Kim2, Hanshik Chung2, Heekyu Choi3
1School of Mechanical of Engineering, Pusan National University, Busan, Korea; 2Department of Precision & Mechanical Engineer- ing and Eco-Friendly Heat & Cold Energy Mechanical Research Team, Gyeongsang National University, Gyeongnam, Korea; 3School of Nano & Advanced Materials Engineering, Changwon National University, Gyeongnam, Korea。
Received November 24th, 2010; revised December 13th, 2010; accepted January 10th, 2011。
ABSTRACT This study presents fatigue crack propagation experiments and the simulation used to estimate the life remaining in a crane that is currently in use at a port。 The fatigue crack propagation experiments were performed by an Instron 8516 fatigue testing machine and the simulation was performed using the AFGROW software。 The simulation results indi- cated that the critical size of the crack in the upper flange surface of the main jib was 107。4 mm and that it would take 818 000 cycles to reach that point。 If the main jib of the crane undertakes 28 800 cycles per annum then its remaining lifespan should be 28。4 years。
Keywords: Crane, Fatigue Crack Propagation, Computer Simulation, Crane Life Remained
1。 Introduction
The cracks in a crane installed in a port are propagated by the repeated operation of the crane over a long period of time。 A crane may fail, causing a serious accident, if a crack exceeds its critical size。 The analysis of fatigue crack propagation is the most important factor in the analysis of the stability and lifespan of the crane but it may require time and expense to investigate it experi-
propagation software。 The crane’s remaining lifespan can be deduced from the simulation results for the main jib [5]。
2。 Theoretical Background
Most of the current research on crack propagation uses the widely accepted Paris Equation [6]。
In this equation
mentally。 Computer simulation is especially useful for
studying the flow of granular assemblies or powders in
da dN C ΔK m
cases where it is difficult to obtain detailed results by direct experimentation [1-3]。 Hence, in order to be effi- 弯曲处的残余应力模型英文文献和中文翻译(9):http://www.youerw.com/fanyi/lunwen_84316.html