Open Access
ARTICLE
Bingfei Liu, Guansuo Dui1, Yuping Zhu
Structural Longevity, Vol.4, No.3, pp. 113-120, 2010, DOI:10.3970/sl.2010.004.113
Abstract Several constitutive models with different yield functions for porous
shape memory alloy (SMA) are compared with the experimental date. Different
approaches such as upper bound theory and lower bound theory have been adopted
and a new correction formula of the yield function is proposed in this work to study
the behavior of porous SMAs. Numerical results are compared with the experimental date by Zhao et al (2005). It shows that the researches using upper bound and
lower bound are nearly the same and the new correction formula is much closer to
the experimental data than others. More >
Open Access
ARTICLE
Bingfei Liu, Guansuo Dui1, Yuping Zhu
Structural Longevity, Vol.4, No.3, pp. 113-120, 2010, DOI:10.3970/sl.2010.004.113
Abstract Several constitutive models with different yield functions for porous
shape memory alloy (SMA) are compared with the experimental date. Different
approaches such as upper bound theory and lower bound theory have been adopted
and a new correction formula of the yield function is proposed in this work to study
the behavior of porous SMAs. Numerical results are compared with the experimental date by Zhao et al (2005). It shows that the researches using upper bound and
lower bound are nearly the same and the new correction formula is much closer to
the experimental data than others. More >
Open Access
ARTICLE
A.P.S. Selvadurai1, P.A. Selvadurai2
Structural Longevity, Vol.4, No.3, pp. 121-128, 2010, DOI:10.3970/sl.2010.004.121
Abstract The conventional procedures for describing fluid flow in porous media
largely rely on assumptions of spatial homogeneity and isotropy. In contrast, naturally occurring porous geologic media display heterogeneity and anisotropy that is
scale-dependent. This paper summarizes results of recent research that uses experimental techniques, mathematical analyses of the experimental configurations and
computational procedures for developing estimates for the effective permeability
of a heterogeneous porous geomaterial. More >
Open Access
ARTICLE
A.P.S. Selvadurai1, P.A. Selvadurai2
Structural Longevity, Vol.4, No.3, pp. 121-128, 2010, DOI:10.3970/sl.2010.004.121
Abstract The conventional procedures for describing fluid flow in porous media
largely rely on assumptions of spatial homogeneity and isotropy. In contrast, naturally occurring porous geologic media display heterogeneity and anisotropy that is
scale-dependent. This paper summarizes results of recent research that uses experimental techniques, mathematical analyses of the experimental configurations and
computational procedures for developing estimates for the effective permeability
of a heterogeneous porous geomaterial. More >
Open Access
ARTICLE
Alice Chia-Mei Liu1, Chang-Chung Yang1, Sheng-Yuan Huang2
Structural Longevity, Vol.4, No.3, pp. 129-135, 2010, DOI:10.3970/sl.2010.004.129
Abstract Fuel cell technology is considered one of the hottest topics in green
energy and has become an emerging green energy industry internationally. In the
meantime, the development of the fuel cell industry has been recognized as one of
the key rising industries in Taiwan. Since 2009, the Industrial Technology Research
Institute (ITRI) has collaborated with Chung-Hua Institute for Economic Research
(CIER) in implementing the fuel cell demonstration and promotion program supported by the Bureau of Energy, Ministry of Economic Affairs. This program focuses on three major areas for application of fuel cells: backup power supply, normal power & combined heat… More >
Open Access
ARTICLE
Wen-Hwa Chen1,2, Chun-Hung Wu1, Hsien-Chie Cheng3,4
Structural Longevity, Vol.4, No.3, pp. 137-144, 2010, DOI:10.3970/sl.2010.004.137
Abstract The phase transformation behaviors of C60 fullerene under atmospheric
pressure are reported using a proposed thermostat molecular dynamics method designed for a solid system. We find that C60 fullerene directly undergoes a solidvapor phase transformation, instead of a solid-liquid phase transition, at a specific
threshold temperature. It reveals that C60 fullerene will sublimate when heated
rather than melt under atmospheric pressure. This phenomenon is coincident with
that of graphite at pressures below 10MPa. The sublimation point of C60 fullerene,
rather than the melting, is about 4350±20K, locating in the published range of
about 4000-4500K for graphite at pressures below 10… More >
Open Access
ARTICLE
N. Yan1, N. Kawagoishi2, Y. Maeda3, Q. Chen4
Structural Longevity, Vol.4, No.3, pp. 145-152, 2010, DOI:10.3970/sl.2010.004.145
Abstract Fatigue tests under rotating bending and ultrasonic loading were carried out using plain specimens with different grain sizes of Ni-base super alloy, Inconel 718, in order to investigate the effects of grain size and loading frequency on
fatigue properties. Fatigue strength was increased with decreasing in grain size under both tests. Moreover, the fatigue strength under ultrasonic loading was higher
than that under rotating bending. The resistance to crack initiation was larger in
smaller grain sized alloy under both tests, and larger under ultrasonic loading than
under rotating bending. Effects of loading frequency and grain size on crack initiation were… More >
Open Access
ARTICLE
K. Kakuda1, J. Toyotani1, S. Matsuda2, H. Tanaka2, K. Katagiri2
Structural Longevity, Vol.4, No.3, pp. 154-161, 2010, DOI:10.3970/sl.2010.004.154
Abstract The application of a particle method to incompressible viscous fluid
flow problems is presented. The method is based on the MPS (Moving Particle
Semi-implicit) scheme using logarithmic weighting function. Numerical results
demonstrate the workability and the validity of the present approach through incompressible viscous fluid flow in a driven cavity and flow behavior in a liquid ring
pump with rotating impeller blades. More >
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