A hybrid multilevel method for simultaneous optimization design of topology and discrete fiber orientation

Hu, Zheng; Vambol, Oleksii; Sun, Shiping

doi:10.1016/j.compstruct.2021.113791

Cited by 13 publications

(4 citation statements)

References 31 publications

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“…7. The optimal topology shape and material distributions of the cantilever plate [54] In order to solve the optimization problem with both continuous and discrete design variables, a hybrid multilevel approach for the topology optimization design of constant-stiffness laminated plates was proposed by Hu et al [55]. At the first level, the MMA algorithm was used to get the optimal lamination parameters and structural topology, and then the IDSA (Improved Direct Simulated Annealing) algorithm was adopted to search for the optimal discrete fiber angle at the second level.…”

Section: Hybrid Methodsmentioning

confidence: 99%

A review on the topology optimization of the fiber-reinforced composite structures

2021

aktt

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According to the requirements of the aerospace industry for high strength, high stiffness, and lightweight structural parts, topology optimization has been proved to be an effective product design method. As one of the most conceptual and prospective structural optimization design methods, topology optimization intends to seek the optimal layout of materials in an allowed design region under a given load and boundary conditions. Thus, the object of study in the article is the method of topological optimization of aircraft structures. The goal of this article is to analyze the existing approaches, algorithms, as well as application of the method of topological optimization in the aerospace field in applied problems. The tasks are to describe the existing various approaches methods, features, and research directions of topological optimization as well as to study the possibility of application in the manufacturing process of composite structures. The following results were obtained. The optimization methods are briefly explained and compared, and the advantages and limitations of each approach are discussed. The various ways of simultaneous optimization of fiber orientation and structural topology were described and analyzed. The features of different methods of continuous fiber orientation optimization method were reviewed. The discrete fiber orientation optimization methods were represented. The possibility of multi-scale concurrent topological optimization was described. The combination of topology optimization and additive manufacturing was considered. Finally, the topology optimization of FRC structures which have been resolved in literature are reviewed and the potential research fields requiring more investigation are pointed out. Conclusions. In the article, a comprehensive review of the topology optimization design of FRC structures was presented. The promising way is to combine topology optimization with additive manufacturing techniques. However, these proposed methods may not suitable for other more complex problems, such as bucking stability and natural frequency. Hence, the topology optimization design of complex FRC components under complicated conditions is the main challenge in the future. This can be a new trend in the topology design of FRC structures.

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Section: Hybrid Methodsmentioning

confidence: 99%

A review on the topology optimization of the fiber-reinforced composite structures

2021

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“…At the present time, composite materials based on ultrathin carbon, glass, organic and other types of fibres in combination with polymeric binders are widely used in various branches of technology [1][2][3][4], such as general construction, bridge engineering, road infrastructure, transport, agricultural machinery, the power sector, biomedicine, and petrochemistry [5][6][7][8][9][10]. The shipbuilding industry, engine manufacturing, aviation, rocket and space technology are the most promising fields of application of polymeric composite materials [11,12].…”

Section: Introductionmentioning

confidence: 99%

Self-Heating Mould for Composite Manufacturing

et al. 2021

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The shipbuilding industry, engine manufacturing, aviation, rocket and space technology are promising fields of application for polymeric composite materials. Shape-generating moulding tools with internal heating are used for the creation of a more economically viable method of moulding of internally heated composite structures. The use of a fine-fibered resistive structure in the heated tools allows implementation of effective heating of the composite and elimination of the need for expensive and energy-intensive heating equipment. The aim of this paper was the reduction of energy consumption for internally heated moulding tools by choosing the optimal parameters for their resistive layer. A method for determination of the parameters of the moulding tool resistive layer was developed. This method allows calculation of the heating layer parameters and implementation of the specified time–temperature regime for moulding of the composite structure. It was shown that energy saving for the heated fiberglass shape-generating moulding tools was from 40 to 60%. It was found that the increase in the thickness of the moulded package of the polymeric composite material resulted not only in a higher supplied power for the heating system, but also in a complication of the method for system control, because of the growing exothermic effect of the binder curing reaction. For composite products based on Hysol EA 9396 binder, thicknesses more than 4 mm are critical, because it is not possible to cope with the self-heating effect only by cooling with ambient air already utilized at the twentieth minute of the moulding process. The influence of the physical and mechanical characteristics of the moulding tool material and stiffening ribs was analysed in terms of energy consumption and controllability of the heating system. Fiberglass shows the lowest energy consumption. Heating of the aluminium and steel moulding tools for the same purpose will require 20% and 45% more power, respectively. An increase in the number of stiffening ribs has a strong effect on the heat removal of the heating system. With a small number of aluminium ribs it is not possible to maintain the specified temperature–time regime for a fiberglass moulded package of 5 mm thick with the use of the equipment. However, when the number of stiffeners is increased to 10, the exothermic effect of the reaction becomes smoother and then the heating equipment can cope with the task. An experimental prototype of heating equipment of moulding tools for the manufacturing of structures of polymeric composite materials, as well as a flexible thermal blanket for repair of non-separable structures, were developed. The results can be the basis for a new method of optimal design of parameters of moulding tool structure at minimal heat removal to the environment.

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“…In order to make full use of the anisotropic property of fiber-reinforced composite material, most of studies focus on the simultaneous optimization of fiber orientation and structural topology, and some relevant research can be found in. [25][26][27][28][29] Because the optimized structures obtained by topology optimization method are often complex, it is not easy to manufacture them by conventional processes, like lay-up or compression molding process. Therefore, some researchers began to pay attention to the topological design for additive manufacturing of fiber-reinforced composite structures.…”

Section: Introductionmentioning

confidence: 99%

Topology optimization of laminated composite structures under harmonic force excitations

Sun

Vambol

et al. 2021

Journal of Composite Materials

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In this paper, a topology optimization approach for the design of laminated composite structures under harmonic force excitations is proposed. A novel method is developed to calculate the harmonic response for composite laminates, which consists of two steps: firstly, based on the strain energy approach, the damping matrix model of composite laminates is established with the proportional damping assumption; then, the displacement response is calculated by the mode acceleration method The design objective of topology optimization is to minimize the displacement amplitude at the concerning point with an excitation frequency or a frequency band. An extended polynomial interpolation scheme is introduced to penalize the stiffness, damped stiffness and mass of elements. The analytical sensitivities of the objective and constraint functions to the density variables are derived in detail, and the globally convergent method of moving asymptotes is used to solve the optimization problem. Numerical examples are performed to demonstrate the effectiveness and feasibility of the proposed topology optimization method in improving the dynamic performance of laminated composite structures. The influence rules of excitation frequency and layer sequence on topologic shape are also discussed.

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A hybrid multilevel method for simultaneous optimization design of topology and discrete fiber orientation

Cited by 13 publications

References 31 publications

A review on the topology optimization of the fiber-reinforced composite structures

A review on the topology optimization of the fiber-reinforced composite structures

Self-Heating Mould for Composite Manufacturing

Topology optimization of laminated composite structures under harmonic force excitations

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