Iranian Journal of Materials Science and Engineering
Iran University of Science & Technology
Sat, Dec 21, 2024
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Volume 5, Issue 2 (spring 2008 2008)
IJMSE 2008, 5(2): 22-31 |
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A. Hassani, R. Ravaee. CHARACTERIZATION OF TRANSVERSE CRACK AND CRACK GROWTH IN A RAILWAY RAIL. IJMSE 2008; 5 (2) :22-31
URL: http://ijmse.iust.ac.ir/article-1-134-en.html
URL: http://ijmse.iust.ac.ir/article-1-134-en.html
Abstract: (31668 Views)
Abstract: To ensure the rail transportations safety, evaluation of fatigue behavior of the rail steel
is necessary. High cycle fatigue behaviour of a rail steel was the subject of investigation in this
research using fracture mechanics. Finite element method (FEM) was used for analyzing the
distribution of the stresses on the rail, exerted by the external load. FEM analysis showed that the
maximum longitudinal stresses occurred on the railhead. To find out about the relation of crack
growth with its critical size, and to estimate its lifetime, the behaviour of transverse cracks to rail
direction was studied using damage tolerance concept. It revealed that transverse crack growth
initially occurred slowly, but it accelerated once the crack size became larger. Residual service
life was calculated for defective segments of the rails. In addition, allowable crack size for
different non-destructive testing intervals was determined the allowable crack size decreased as
the NDT intervals increased.
Type of Study: Research Paper |
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