This paper deals with topology optimization of composite structure using Bi-directional Evolutional Structural Optimization (BESO) method. By redefining the criteria of the optimization evolution progress, the proposed method is able to extend current BESO method from isotropic material to anisotropic composite material. The initial modification of BESO method is to allow for inefficient Materi...

The area of topology optimization of continuum structures of which is allowed to change in order to improve the performance is now dominated by methods that employ the material distribution concept. The typical methods of the topology optimization based on the structural optimization of two phase composites are the so-called variable density ones, like the SIMP (Solid Isotropic Material with Pe...

After cells have completed a sufficient number of cell divisions, they exit the cell cycle and enter replicative senescence. Here, we report that beryllium causes proliferation arrest with premature expression of the principal markers of senescence. After young presenescent human fibroblasts were treated with 3 microM BeSO(4) for 24 h, p21 cyclin-dependent kinase inhibitor mRNA increased by >20...

A new topology optimization algorithm is proposed based on bi-directional evolutionary structural optimization (BESO) method in order to design photonic crystals with maximum band gaps. The optimization process starts from a simple unit cell without band gap, and the photonic crystals are assumed to be periodically composed of two materials with different permittivity. Based on finite element a...

rz'sco, gesrdo de projectos, A geso de risco tern vindo a assumir nos dltimos anos um papel fundamental na geso de projectos de software. A crescente complexidade dos projectos, combinada com um rapido ritmo de mudana no ambiente de neg6cio em Que estes tomam Ingar, exp6e cada vez mais a equipa de projecto a um variado leque de incertezas. A gesi:do bdsica do projecto assent& num processo de co...

According to BESO’s principle of binarizing continuous design variables and the excellent performance standard HPO algorithm in terms solving optimization problems, a discrete binary Hunter-prey is introduced construct an efficient topology model. It was used solve problems that BESO method has, such as easily falling into local optimal value being unable obtain configuration; metaheuristic abl...

This paper incorporates the homogenization theory into non-penalized Smooth-Edged Material Distribution for Optimizing Topology (SEMDOT) algorithm to conduct design of cellular structures with maximum shear modulus. The parametric study and comparison existing results obtained by BESO are carried out. numerical examples in 2D 3D demonstrate effectiveness SEMDOT generating smooth Compared BESO, ...