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Brad Regez, Sridhar Krishnaswamy, Kirk Kuehling
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 67-68, 2011, DOI:10.3970/icces.2011.020.067
Abstract Dr. Brad Regez

Northwestern University, USA More >

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868

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P. Huke, Ralf B. Bergmann
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 69-70, 2011, DOI:10.3970/icces.2011.020.069
Abstract Non-destructive testing (NdT) describes a wide range of principles and methods for measuring and comparing physical quantities against a nominal condition. Commonly NdT is related the detection of defects in or on solid-state bodies. This may include hidden defects as well as optical appearance (reflectivity, absorbance, polarity), shape, stress, strain and many other characteristics. In many applications contactless NdT is advantageous due to the state of the object in question. Most often optical metrology, like shearography, reflectometry, vibrometry and laser ultrasound, is contactless or needs no physical contact to the measurement area. The optical NdT… More >

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897

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Lakis A. A., Toorani M. H., Kerboua Y., Esmailzadeh M., Sabri F.
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 71-72, 2011, DOI:10.3970/icces.2011.020.071
Abstract This paper review focuses mainly on development and application of a hybrid finite element approach used for linear and geometrically nonlinear vibration analysis of isotropic and anisotropic plates and shells, with and without fluid-structure interaction. Development of a hybrid element for different geometries of plates and shells is briefly discussed. In addition, studies dealing with particular dynamic problems such as dynamic stability and flutter of plates and shells coupled to flowing fluids are also discussed. This paper is structured as follows: after a short introduction on some of the fundamentals of the developed model applied More >

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853

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Kang-Hai TAN
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 73-74, 2011, DOI:10.3970/icces.2011.020.073
Abstract This paper presents the behaviour and modelling of two experimental programmes, viz. one on typical extended end-plate steel beam-to-column (conventionally deemed as "fully rigid" joints) and another on composite steel beam- to-column (conventionally deemed as ßemi-rigid" joints) under fire conditions. The first programme comprised three beam-column cruciform joints tested at isothermal temperature of 400C, 550C and 700C, and another three specimens at 700C but subjected to different axial restraints. The second programme consisted of six ambient temperature tests (as control specimens) and eight elevated-temperature tests on composite top-and-seat-and-web (TSW) angle joints under vertical loading. It… More >

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868

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Chi-Ming Lee, NASA Glenn Research Center
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 75-76, 2011, DOI:10.3970/icces.2011.020.075
Abstract The fuel-flexible, low-NOx (Nitrogen oxides) combustor task of the Environmentally Resonsible Aviation (ERA) project is to develop a low emissions combustor capable of meeting the Landing and Take-Off (LTO) NOx emissions reduction while reducing aircraft fuel burn by 50% without negatively impacting other emissions and achieving perceived noise levels 42 dB below stage 4 limits. The low emissions combustor should be capable of meeting the mid-term LTO NOx goal of 75% reduction from the International Civil Aviation Organization (ICAO) standard adopted at Committee on Aviation Environment Protection (CAEP 6). In addition to NOx and Other… More >

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851

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Jie Wang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 77-78, 2011, DOI:10.3970/icces.2011.020.077
Abstract Ferroelectric nanostructures exhibit vortex structures with the shrinking of the relevant lengths to the nanometer scale because of the strong depolarization field. The vortex structure in the nanoscale ferroelectrics, similar to the vortex structure in magnetic nanostructure, is regarded as a toroidal order which is different from the common homogeneous polarization order. The finding of the vortex in ferroelectric nanostructures opens exciting opportunities for designing nanomemory devices, which holds a promise to increase the density of ferroelectric nonvolatile random access memories by several orders of magnitude. The switching behavior of polarization vortex under a curled… More >

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788

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Prakash Thamburaja
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 79-80, 2011, DOI:10.3970/icces.2011.020.079
Abstract Some recent experiments on sub-micron and nano-sized metallic glass specimens have shown that the shear localization process becomes more stable and less catastrophic when compared to the response exhibited by large sample sizes. This leads to the discovery that the shear localization process and fracture can be delayed by decreasing sample volume. In this work we develop a non-local and finite-deformation-based constitutive model using thermodynamic principles and the theory of micro-force balance to study the causes for the aforementioned observations. The constitutive model has also been implemented into a commercially-available finite-element program by writing a… More >

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855

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Xiaoying Zhuang, Yongchang Cai, Hehua Zhu.
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 81-82, 2011, DOI:10.3970/icces.2011.020.081
Abstract Meshless methods have shown advantages in dealing with problems of moving interfaces such as crack propagation in rock. In Tongji University, meshless methods, the meshless Shepard and least squares (MSLS) method and the element-free Galerkin (EFG) method have been applied to slope stability analysis, especially for rock slope stability governed by a number of dominating discontinuities. Previous studies have focused on 2D problems where a joint surface is modelled as a crack line [1]. In this paper, the EFG method is extended for analyzing 3D rock slope with a single planner elliptic joint. Due to More >

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809

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Nengguang Liu, Wei Gao, Chongmin Song, Nong Zhang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 83-84, 2011, DOI:10.3970/icces.2011.020.083
Abstract This paper presents the probabilistic dynamic analysis of vehicle-bridge interaction systems. The bridge's and vehicle's parameters are considered as random variables as well as the road surface roughness is modeled as random process. A quarter-car model is used to represent a moving vehicle and the bridge is treated as an Euler-Bernoulli beam. From the equation of motion for the vehicle-bridge coupling system, the expressions for mean value and standard deviation of bridge response are developed by using the random variable's functional moment method. The effects of the individual system parameters and the road surface roughness More >

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1141

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851

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David CC LAM^*, Leo K-K LEUNG, Match W-L KO, R. G-Z CHEN, I-S CHAN
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 85-86, 2011, DOI:10.3970/icces.2011.020.085
Abstract The eye is a biomechanical organ where the health of the optical nerves and vision are affected by the intrCular pressure and the ocular tissue structure. The ocular pressure is the primary parameter monitored by opticians and ophthalmologists to determine the ocular health of the eye to prevent glaucoma where 50% of the vision can be lost before detection by the patient. Elevated intrCular pressure is clinically correlated with the degeneration of the optic nerves, but the biomechanical mechanism for the degeneration remains speculative. In this study, we present the results from biomechanical modeling of More >

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774

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Yifan Xia, Jie Wang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 87-88, 2011, DOI:10.3970/icces.2011.020.087
Abstract Phase field simulation is an effective way to predict the domain evolution in ferroelectric materials. A phase field model is developed to investigate the domain structures and polarization switching in in ferroelectric thin films with deadlayers. Simulation results show that the deadlayers as well as misfit strain have a significant influence on the domain structures and polarization switching in the ferroelectric thin films. It is found that the simulated switching electric field in ferroelectric thin films decreases with the thickness of the deadlayers increasing. More >

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840

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Jun Wang, David CC LAM
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 89-90, 2011, DOI:10.3970/icces.2011.020.089
Abstract Selected elastic and plastic behaviors of materials have been shown to exhibit size-dependence when they are in the micro-nanoscale. Experiments have shown that the scale-dependent behavior can be modeled by adding strain gradient terms into the finite element models, but modifications need to satisfy C1 displacement continuity in the models. In this investigation, meshless finite element formulation, where C1 continuity can be satisfied without new additions nodal degrees of freedom, was developed. In the formulation, the strain gradients were decomposed into dilatation, stretch and rotation parts; and the governing equations were discretized on local domains More >

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1100

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775

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T. Fu, C.P. Wang, B. Hou, X.D. Zhu, Z.F. Zhou, K.Y. Li, J. Lu
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 91-92, 2011, DOI:10.3970/icces.2011.020.091
Abstract Structural steels are widely used in engineering fields. Generally, they have the advantage of lower prices due to less precious alloy elements contained; however, their properties, especially the surface properties are inferior to high alloy steels. Surface engineering are of importance in improving surface properties of steels, and even a 'new' surface layer with high performances can be produced by surface technologies on low cost structural steels with ordinary properties.
The researches of last decade have shown that surface nanocrystallization (SNC) can markedly improve surface mechanical properties of metallic materials and accelerate thermal diffusion of N,… More >

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857

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Min Hwan Oh, Hee Jun Lee, Minho Chung, Jin Yeon Cho, Do Soon Hwang
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 93-94, 2011, DOI:10.3970/icces.2011.020.093
Abstract Lunar lander may experience various impact loadings when it makes a landing on the lunar surface. Due to the reason, shock absorption system of lunar lander should be designed to absorb the landing energy of lunar lander efficiently for a successful lunar mission. Shock absorption system should be reliable, and the entire landing energy should be absorbed into the shock absorption system to prevent a critical bouncing or turn-over. One the other hand, to protect the payloads, excessive deceleration should be avoided while absorbing the landing energy.

To design an efficient shock absorption system of More >

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819

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Hang Lin, Ping Cao, Jiangteng Li
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 95-96, 2011, DOI:10.3970/icces.2011.020.095
Abstract The cohesion c and friction angle I are the shear strength parameters influencing the stability of slope. Any of them changes, the factor of safety of slope will change, many work has been done on the relationship between shear strength parameters and factor of safety, but it has seldom been considered in the literature how the slip surface changes at the same time. In the present paper, the strength reduction method is used to find out the effect of shear strength parameters c and Phi to the distribution of slip surface. The study shows that, More >

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1102

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816

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ABSTRACT

Gu Ming
The International Conference on Computational & Experimental Engineering and Sciences, Vol.20, No.3, pp. 97-98, 2011, DOI:10.3970/icces.2011.020.097
Abstract With the rapid development of the ocean economy in our country, more and more offshore structures appear in recent years, and high-rise platform pile group is one of the conventional forms of these structures. A large-scale physical model test was carried out to study the bearing characteristics of high-rise platform pile group subjected to cyclic lateral load such as wave, tidewater and wind, etc. Two sets of pile group tests under lateral load were conducted in QianTang silts, which consist of nine steel-pipes in a closely-spaced arrangement. The group effect of pile groups, and its More >

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765