Multi-objective topology optimization for materials with negative Poisson’s ratio and thermal insulation

IF 2.7 3区 材料科学 Q2 ENGINEERING, MECHANICAL International Journal of Mechanics and Materials in Design Pub Date : 2024-08-09 DOI:10.1007/s10999-024-09721-9
Yi Wang, Yanding Guo, Tieqiang Gang, Lijie Chen
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Abstract

Thermal protection system (TPS) of spacecraft requires enhanced impact resistance and thermal insulation capability while pursuing higher stiffness. Considering this, a topology optimization method of periodic microstructures with negative Poisson’s ratio and insulation performance is proposed for the filling material design of the core layer in TPS, in which homogenization approach is adopted in calculating properties of microstructures and multi-objective optimization is used for balancing the mechanical and thermal properties of the optimized microstructures. Considering the optimization design of impact-resistant structures with negative Poisson’s ratio, a novel objective function is proposed to reduce the influence of iteration steps on the optimization results. For the topology optimization of insulation structures, a suitable objective function is selected by comparing the optimization results of two existing objectives. Based on the weighted linear combination, a multi-objective microstructural topology optimization method is proposed, simultaneously incorporating negative Poisson’s ratio and insulation performance. By adjusting the weighting coefficient of the objective functions, the microstructure of the materials can be designed according to different performance requirements. Several 2D and 3D optimized microstructures with both better impact resistance and insulation performance of TPS are successfully designed. In addition, the 2D optimized microstructures under different weights are assembled into sandwich structures, and the compression and heat conduction are simulated to further illustrates the validity and flexibility of the proposed method considering requirements of both impact-resistant and thermal insulation performances of sandwich structures.

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负泊松比和隔热材料的多目标拓扑优化
航天器的热保护系统(TPS)要求在追求更高硬度的同时,增强抗冲击和隔热能力。有鉴于此,针对 TPS 核心层填充材料的设计,提出了一种具有负泊松比和隔热性能的周期性微结构拓扑优化方法,其中采用了均质化方法计算微结构的性能,并使用多目标优化来平衡优化后微结构的机械性能和热性能。考虑到负泊松比抗冲击结构的优化设计,提出了一种新的目标函数,以减少迭代步骤对优化结果的影响。针对绝缘结构的拓扑优化,通过比较两个现有目标的优化结果,选择了一个合适的目标函数。在加权线性组合的基础上,提出了一种多目标微结构拓扑优化方法,同时结合了负泊松比和绝缘性能。通过调整目标函数的权重系数,可以根据不同的性能要求设计材料的微结构。成功设计出了几种二维和三维优化微结构,它们都具有更好的 TPS 抗冲击性能和绝缘性能。此外,还将不同重量下的二维优化微结构组装成夹层结构,并模拟了压缩和热传导过程,进一步说明了所提方法的有效性和灵活性,同时考虑了夹层结构的抗冲击和隔热性能要求。
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来源期刊
International Journal of Mechanics and Materials in Design
International Journal of Mechanics and Materials in Design ENGINEERING, MECHANICAL-MATERIALS SCIENCE, MULTIDISCIPLINARY
CiteScore
6.00
自引率
5.40%
发文量
41
审稿时长
>12 weeks
期刊介绍: It is the objective of this journal to provide an effective medium for the dissemination of recent advances and original works in mechanics and materials'' engineering and their impact on the design process in an integrated, highly focused and coherent format. The goal is to enable mechanical, aeronautical, civil, automotive, biomedical, chemical and nuclear engineers, researchers and scientists to keep abreast of recent developments and exchange ideas on a number of topics relating to the use of mechanics and materials in design. Analytical synopsis of contents: The following non-exhaustive list is considered to be within the scope of the International Journal of Mechanics and Materials in Design: Intelligent Design: Nano-engineering and Nano-science in Design; Smart Materials and Adaptive Structures in Design; Mechanism(s) Design; Design against Failure; Design for Manufacturing; Design of Ultralight Structures; Design for a Clean Environment; Impact and Crashworthiness; Microelectronic Packaging Systems. Advanced Materials in Design: Newly Engineered Materials; Smart Materials and Adaptive Structures; Micromechanical Modelling of Composites; Damage Characterisation of Advanced/Traditional Materials; Alternative Use of Traditional Materials in Design; Functionally Graded Materials; Failure Analysis: Fatigue and Fracture; Multiscale Modelling Concepts and Methodology; Interfaces, interfacial properties and characterisation. Design Analysis and Optimisation: Shape and Topology Optimisation; Structural Optimisation; Optimisation Algorithms in Design; Nonlinear Mechanics in Design; Novel Numerical Tools in Design; Geometric Modelling and CAD Tools in Design; FEM, BEM and Hybrid Methods; Integrated Computer Aided Design; Computational Failure Analysis; Coupled Thermo-Electro-Mechanical Designs.
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