Open Access
ARTICLE
K.K. Vaze1
Structural Longevity, Vol.3, No.2, pp. 87-109, 2010, DOI:10.3970/sl.2010.003.087
Abstract Advanced Heavy Water Reactor (AHWR) is a 920 MWth, 300 MWe
vertical pressure tube type reactor, which uses boiling light water as a coolant in
a high-pressure main heat transport (MHT) system. Structural integrity considerations have been a part of the design process right from selection of material. Among
the various degradation mechanisms, low temperature sensitization and low temperature embrittlement were considered to be the life limiting material degradation
mechanisms: In view of the proposed 100 year life of AHWR, these issues need
to be addressed in a thorough manner. SS 304LN has been chosen based on its
satisfactory low… More >
Open Access
ARTICLE
Manu Santhanam1
Structural Longevity, Vol.3, No.2, pp. 111-125, 2010, DOI:10.3970/sl.2010.003.111
Abstract Ultrasonic non-destructive evaluation is an essential component of condition assessment of concrete. Conventionally, the use of ultrasonics is limited to
the study of velocity of sound through concrete. The velocity is qualitatively linked
to the condition of the concrete in service. However, sophistication in signal processing has led to the development of better ultrasonic techniques that can give
some quantitative estimates of the damage. This paper describes the use of the
transmitted ultrasonic energy to estimate the level of damage in concrete under
uniaxial compression. The experimental set up was designed to collect ultrasonic
signals between transducers at opposite ends… More >
Open Access
ARTICLE
M. K. Samal1
Structural Longevity, Vol.3, No.2, pp. 127-153, 2010, DOI:10.3970/sl.2010.003.127
Abstract Safety analysis of critical components and the overall plant is a major
and important task in the field of mechanical engineering. Therefore, it is essential
to know the allowable loads and the corresponding failure behaviour (e.g., crack
initiation, growth and instability) of the component. The damage mechanics approaches which incorporate the microscopic processes of ductile fracture (i.e., void
nucleation, growth and coalescence) into the material constitutive behaviour has
been very successful in predicting the ductile crack propagation in specimens and
components irrespective of their geometry, loading types etc. The major drawback
of these models is the requirement of a pre-defined… More >
Open Access
ARTICLE
Deepankar Choudhury1
Structural Longevity, Vol.3, No.2, pp. 155-170, 2010, DOI:10.3970/sl.2010.003.155
Abstract Structural integrity of underground constructions or sub-structures like
foundations, anchors, basements, piles, piers, abutments, retaining walls, subgrade
of railway, highway, airport runway etc. are important concern for the engineers
and researchers in the entire world to advance on the infrastructural developments
of any country. Several historical giant earthquakes all over the world had always
put the researchers and engineers to the new challenge for developing advanced
and new techniques of design and construction to maintain the structural integrity
of the infrastructural systems. In this paper, the state-of-the-art type analysis and
design techniques for behavior of such sub-structural system during seismic… More >
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