Topology optimization of composite material with high broadband damping

2020 ◽  
Vol 239 ◽  
pp. 106331
Author(s):  
Heng Zhang ◽  
Xiaohong Ding ◽  
Qian Wang ◽  
Weiyu Ni ◽  
Hao Li
Keyword(s):  
Composite Material ◽  
Topology Optimization

Topology optimization for 3D microstructures of viscoelastic composite materials

2021 ◽  
Author(s):  
Jianglin Yang ◽  
Shiyang Zhang ◽  
Jian Li
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Viscoelastic Material ◽  
Effective Properties ◽  
Vibration Damping ◽  
Homogenization Theory ◽  
Viscoelastic Composite ◽  
Viscoelastic Composite Material ◽  
High Stiffness ◽  
Beso Method

Abstract Materials with high stiffness and good vibration damping properties are of great industrial interest. In this paper, a topology optimization algorithm based on the BESO method is applied to design viscoelastic composite material by adjusting its 3D microstructures. The viscoelastic composite material is assumed to be composed of a non-viscoelastic material with high stiffness and a viscoelastic material with good vibration damping. The 3D microstructures of the composite are uniformly represented by corresponding periodic unit cells (PUCs). The effective properties of the 3D PUC are extracted by the homogenization theory. The optimized properties of the composites and the optimal microscopic layout of the two materials phases under the conditions of maximum stiffness and maximum damping are given by several numerical examples.

Optimization Methodology for an Automotive Composite Hood

2013 ◽  
Author(s):  
Alberto Lazzarini ◽  
Alessandro Valgimigli ◽  
Andrea Baldini ◽  
Enrico Dolcini ◽  
Stefano Sangermano
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Automotive Industry ◽  
Point Of View ◽  
Design Phase ◽  
Trial And Error ◽  
Varying Thickness ◽  
Optimization Methodology ◽  
Prototype Phase ◽  
Actual Part

The current emissions regulations lead car manufacturers to look carefully for weight reduction. In the automotive industry the classic trial-and-error approach to design is becoming inadequate and techniques based on optimization are necessary to improve the design process. In this study a methodology to design a sport-car front hood is proposed. The process carried out could also be extended to car components characterised by a similar configuration. Starting from the geometry of the actual part, a design volume has been defined. The first step consists of a topology optimization performed considering the material as isotropic (aluminium properties): the output is a rough structure which accomplishes all the imposed targets. The interpretation of the topology results brings to a re-design phase aimed at realising a feasible component. The subsequent optimization step is dedicated to composite material structures and acts on the component plybook, varying thickness and orientation of each ply to find the best solution complying with targets. Finally, the component has to be reviewed from a technological point of view in order to be virtually delivered and to proceed with the prototype phase.

Topology optimization of fibers orientation in hyperelastic composite material

2020 ◽  
Vol 231 ◽  
pp. 111488 ◽  
Author(s):  
Andre Luis Ferreira da Silva ◽  
Ruben Andres Salas ◽  
Emilio Carlos Nelli Silva ◽  
J.N. Reddy
Keyword(s):  
Composite Material ◽  
Topology Optimization ◽  
Fibers Orientation

Atomic structure of interface of intermetallic compound TiAl and nitride Ti2AIN using HREM and image processing

1991 ◽  
Vol 49 ◽  
pp. 570-571
Author(s):  
E. Sukedai ◽  
H. Mabuchi ◽  
H. Hashimoto ◽  
Y. Nakayama
Keyword(s):  
Mechanical Properties ◽  
Image Processing ◽  
Composite Material ◽  
Intermetallic Compound ◽  
Side Surface ◽  
High Resolution Electron Microscopy ◽  
Hexagonal Structure ◽  
Second Phase ◽  
Resolution Electron ◽  
Compound Tial

In order to improve the mechanical properties of an intermetal1ic compound TiAl, a composite material of TiAl involving a second phase Ti2AIN was prepared by a new combustion reaction method. It is found that Ti2AIN (hexagonal structure) is a rod shape as shown in Fig.1 and its side surface is almost parallel to the basal plane, and this composite material has distinguished strength at elevated temperature and considerable toughness at room temperature comparing with TiAl single phase material. Since the property of the interface of composite materials has strong influences to their mechanical properties, the structure of the interface of intermetallic compound and nitride on the areas corresponding to 2, 3 and 4 as shown in Fig.1 was investigated using high resolution electron microscopy and image processing.

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