Open Access
ARTICLE
A. Shimamoto1, C. C. Lee2, Y. Furuya3
Structural Longevity, Vol.8, No.2, pp. 71-81, 2012, DOI:10.3970/sl.2012.008.071
Abstract The TiNi fiber reinforced / PC composite material was developed, and
shape memory effect, which would prevent fatigue crack growth, of the material
was investigated through fatigue experiments. The fatigue behavior and crack propagation were observed under various temperature in the SEM servopulser, which is
a fatigue testing instrument with scanning electron microscope. The results showed
the effectiveness of fatigue resistance. The shape memory effect and expansion behavior of the matrix caused by increasing temperature created the fatigue crack
propagation control mechanism. It was verified that the controlling of fatigue crack
growth was attributed to the compressive stress field in… More >
Open Access
ARTICLE
E.E. Theotokoglou1, E. Sideridis1
Structural Longevity, Vol.8, No.2, pp. 83-97, 2012, DOI:10.3970/sl.2012.008.083
Abstract In this work a class a particle reinforced polymers have been investigated using nondestructive and destructive techniques. The velocities cl and ct
of the longitudinal and transverse waves were evaluated using ultrasounds. From
these and from the density of the material the modulus of elasticity, the shear modulus and the Poisson ratio were calculated by the appropriate relationships. The
results were compared with those obtained from destructive tensile experiments
and as well as with those derived from theoretical formulae. Also, their attenuation
coefficient α and damage parameter D were obtained and an attempt was made to
establish a relationship between… More >
Open Access
ARTICLE
Y. C. Shiah1, C. L. Tan2
Structural Longevity, Vol.8, No.2, pp. 99-107, 2012, DOI:10.3970/sl.2012.008.099
Abstract In BEM analysis of generally anisotropic solids, the additional volume integral associated with thermal effects that appears in the direct formulation
of the boundary integral equation (BIE) has hitherto been successfully transformed
in an analytically exact fashion into surface ones only for two-dimensions (2D), and
not for the three-dimensional (3D) case. This is due to the mathematical complexity of the Green’s function and its derivatives for the 3D solid. The presence of the
domain integral destroys the distinctive feature of the boundary element method
(BEM) as a truly boundary solution numerical analysis tool. As a precursor to
treating this problem… More >
Open Access
ARTICLE
F. Dufour1, N. Prime1, F. Darve1
Structural Longevity, Vol.8, No.2, pp. 109-115, 2012, DOI:10.3970/sl.2012.008.109
Abstract In this contribution, an original constitutive model is proposed to describe, within a unique framework, the initiation, the propagation and the arrest
phases of landslides. The model is built such that it is enable to model in one hand
a stable stage with an elasto-plastic behaviour, and in another hand a viscous dominated behaviour. The transition between the two behaviours is performed by means
of the second order work stability criterion. This model is applied for an undrained
triaxial test, in which the stress invariant consistently falls after the transition. More >
Open Access
ARTICLE
S. Parvanova1, P. Dineva2, G. Manolis3
Structural Longevity, Vol.8, No.2, pp. 117-123, 2012, DOI:10.3970/sl.2012.008.117
Abstract The aim of the present study is to develop and validate an efficient
boundary element method approach for solution of in-plane, time-harmonic problems in elastodynamics that involve finite elastic solids weakened by holes of different shapes. The modeling approach is within the framework of continuum mechanics and linear wave propagation theory. The results obtained show a sensitivity
of both the dynamic stress concentration factor and the scattered wave field that develop in the finite solid to defect geometry, to wave interaction with the holes and
to multiple hole interaction. More >
Open Access
ARTICLE
Marjan Uddin1, Ghulam Kassem1
Structural Longevity, Vol.8, No.2, pp. 125-137, 2012, DOI:10.3970/sl.2012.008.125
Abstract An interpolation method using radial basis functions is applied for the
numerical solution of good Boussinesq equation. The numerical method is based
on scattered data interpolation along with basis functions known as radial basis
functions. The spatial derivatives are approximated by the derivatives of interpolation and a low order scheme is used to approximate the temporal derivative. The
scheme is tested for single soliton and two soliton interaction. The results obtained
from the method are compared with the exact solutions and the earlier works. More >
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