This paper presents the bidirectional evolutionary structural optimization (BESO) method for the design of two-phase composite materials with optimal properties of stiffness and thermal conductivity. The composite material is modelled by microstructures in a periodical base cell (PBC). The homogenization method is used to derive the effective bulk modulus and thermal conductivity. BESO procedur...

In this paper, we propose a cost-effective optimal-topology retrofitting technique for hollow-steel-section columns to sufficiently support industrial running cranes. A so-called bi-directional evolutionary structural optimization (BESO) method was encoded within the MATLAB modeling framework, with direct interface an ANSYS commercial finite-element analysis program, determine optimal topology ...

1. Abstract: Phononic band gap crystals, which could prohibit the propagations of elastic waves in certain frequency, are consisted of periodically distributed inclusions embedded in a matrix with high contrast in mechanical properties. In recent years, systematic design of phononic band gap crystals has attracted increasing attention due to their wide applications such as sound insulation, wav...

Chronic beryllium disease (CBD) is caused by exposure to beryllium in the workplace, and it remains an important public health concern. Evidence suggests that CD4(+) T cells play a critical role in the development of this disease. Using intracellular cytokine staining, we found that the frequency of beryllium-specific CD4(+) T cells in the lungs (bronchoalveolar lavage) of 12 CBD patients range...

Abstract Buckling is a critical phenomenon in structural members under compression, which could cause catastrophic failure of structure. To increase the buckling resistance design, novel topology optimization approach based on bi-directional evolutionary (BESO) method proposed this study with consideration constraints. The BESO benefits from using only two discrete statuses (solid and void) for...

An engine bracket is one of the most critical components used for mounting and supporting in vehicles. Today, automobile industry requires lightweight components, which will reduce car's overall weight when fitted into vehicle. Topology optimization a technique with help surface component optimized to get required shape having reduced weight. The by optimizing material on details. In this paper...