Open Access

ABSTRACT

Yongjie Zhang¹, Boyle C. Cheng², Changho Oh¹, Jessica L. Spehar², James Burgess³
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 57-62, 2008, DOI:10.3970/icces.2008.007.057
Abstract The spinal column plays a vital biomechanical role in the human body by providing structural support and facilitating motion. As degenerative changes occur in the spine, however, chronic pain can result which frequently forces patient to seek surgical treatment. Such treatments seek to address that pain, frequently by addressing both spinal motion and structural integrity. More >

View

1050

Download

735

Open Access

ABSTRACT

Osorio Rivera Fray León¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 63-76, 2008, DOI:10.3970/icces.2008.007.063
Abstract In the development context of a project about a system of selection uchuva for export by means of artificial vision whose objective is to provide an electromechanical system to able to select uchuvas by searching on its physical appearance, some algorithms have been developed to extract the necessary details beginning with the image of the acquired fruit using a camera. As a result, it must be able to determine if the visualized uchuva presents some symptom (insects, fungus, and deterioration) that indicates if it should be discharged. More >

View

976

Download

742

Open Access

ABSTRACT

M. Macri¹, P. Chung¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 77-82, 2008, DOI:10.3970/icces.2008.007.077
Abstract In this paper, we compare three interpolation functions in a discretized continuum when used in coupled dynamic atomistic-to-continuum simulations. The focus is on assessing the ability of the discrete continuum model to capture and accurately represent transient effects, namely a travelling longitudinal wave, through both the mixed atomistic-continuum interface and the non-uniform continuum mesh beyond. We specifically examine the differences among Bubnov-Galerkin, partition of unity, and moving least squares finite element methods, which generally fall under the framework of the meshless Petrov-Galerkin Finite Elements, in the continuum part of the multiscale model, where the key More >

View

926

Download

667

Open Access

ABSTRACT

L. Palermo Jr., L.P.C.P.F. Almeida¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 83-88, 2008, DOI:10.3970/icces.2008.007.083
Abstract The differentiation of the kernels of integrals in the displacement BIE to obtain one for stresses increases the order of the kernel singularity and additional care are necessary to treat the improper integrals. The application of the tangential differential operator (TDO) can reduce the order of the kernel singularity when the stress BIE employs Kelvin type fundamental solutions. This paper presents the numerical formulation for the TDO to three-dimensional problems. The TDO uses the derivatives of the shape function for displacements instead of introducing another interpolation function. Furthermore, the paper shows the additional integrals for More >

View

1015

Download

734

Open Access

ABSTRACT

P. Kuklik¹, M. Zalesky², J. Zalesky³
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 89-94, 2008, DOI:10.3970/icces.2008.007.089
Abstract The robust analytical solution was carried out to describe the stress state in the massive round boreholes. It gives the chance for complex back analysis of dilatometric in situ measurements. The main goal of this presentation is to present the incorporating phenomenon of influence zone around the boreholes. The analytical solution gives the chance to describe the progress of plastic zone around the hole. More >

View

949

Download

706

Open Access

ABSTRACT

G.M. Mota¹, P. Sollero¹, F.B. Batista¹, E.L. Albuquerque¹
The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 95-100, 2008, DOI:10.3970/icces.2008.007.095
Abstract Nowadays, the experimental modal analysis in composite materials is an important tool in the structural analysis of new designs in aircraft structures. It supplies data on the behavior of these materials and, when associated with numerical methods, it can also be used to identify elastic properties. However, lightweight composite materials demand the use of appropriate techniques and devices. This paper describes an experimental modal analysis technique where the response is measured without physical contact in a large number of points using a Laser Doopler Vibrometer (LDV), and the excitation is carried out on a single More >

View

1011

Download

974

Open Access

ABSTRACT

The International Conference on Computational & Experimental Engineering and Sciences, Vol.7, No.2, pp. 101-106, 2008, DOI:10.3970/icces.2008.007.101
Abstract A nonliear meshless local Petrov-Galerkin (NMLPG) method for solving nonlinear boundary value problems, based on the nonlinear regular local boundary integral equation (NRLBIE) and the moving least squares approximation, is proposed in the present paper. No special integration scheme is needed to evaluate the volume and boundary integrals. The integrals in the present method are evaluated only over regularly-shaped sub-domains and their boundaries. This flexibility in choosing the size and the shape of the local sub-domain will lead to a more convenient formulation in dealing with the nonlinear problems. Compared to the original meshless local… More >

View

992

Download

694