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Books > Professional & Technical > Mechanical engineering & materials > Materials science > Mechanics of solids > Stress & fracture
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Residual Stress in Rails - Effects on Rail Integrity and Railroad Economics Volume II: Theoretical and Numerical Analyses (Hardcover, 1993 ed.)
Loot Price: R8,416
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Residual Stress in Rails - Effects on Rail Integrity and Railroad Economics Volume II: Theoretical and Numerical Analyses (Hardcover, 1993 ed.)
Series: Engineering Applications of Fracture Mechanics, 12-13
Expected to ship within 10 - 15 working days
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These volumes contain contributions from a conference on the themes
of measurement and prediction of residual stress in railroad rails.
The subtitle, Effects of rail integrity and railroad economics',
expresses an ultimate goal of reducing technical results to
practical knowledge of interest to transportation engineers. Volume
I contains elements of practical railway experience, laboratory
tests, including experimental strees analysis, and theoretical
evaluations of residual stress, crack propagation, and rail
fracture. Observations of the effects of residual stress on rails
in service, field tests, and laboratory experiments and recounted
in the first three chapters of the volume. Experiments in which
samples of new rail are subjected to precisely controlled rolling
contact loads under laboratory conditions are dealt with in
Chapters 4 and 5. Chapter 6 describes a method for programming
loads on compact tension specimens to stimulate the stress
intensity factor history of an internal transverse crack in rail
head. Chapter 7 outlines a method for setting rail inspection
intervals in service, based on what is presently known about the
behaviour of transverse cracks in the rail head. The remainder of
the volume deals with experimental stress analysis. Chapter 8
describes an elaborate procedure for combining stair change and
length to evaluate internal stress distribution, and several other
measurement techniques are also evaluated as possible alternates.
Chapter 9 discusses the neutron diffraction method and its recent
application to rail. Chapter 10 summarizes a technique based on
MoirA(c) interferometry and reports on the first step in the
developments of rail stress measurementprocedure based on this
alternate. Chapter 13 concludes the experimental contributions with
a summary of some typical measurements of the residual stress
states in rails from several different producers and service
environments in Europe. The reader will find that a reasonable
qualitative picture of the rail residual stress field emerges from
the experimental stress analyses. However, the details always vary
from one rail to another, and there are sufficient differences to
prevent the drawing of general quantitative conclusions from the
experimental work alone. Theoretical and numerical analyses' are
presented in Volume II, in the hope that models based on solid
mechanics can correlate the experimental stress measurements and
lead to a better understanding of the effects of residual stress
upon crack propagation, fracture, and ultimately the economics of
rail in the modern railroad environment.
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