中国塑料 ›› 2021, Vol. 35 ›› Issue (2): 52-57.DOI: 10.19491/j.issn.1001-9278.2021.02.009

• 加工与应用 • 上一篇    下一篇

基于可靠性的中空板结构⁃功能一体化设计与性能研究

尹芳放1, 党开放1, 杨卫民1,2, 丁玉梅1, 谢鹏程1,2()   

  1. 1.北京化工大学机电工程学院,北京 100029
    2.北京化工大学有机无机复合材料国家重点实验室,北京 100029
  • 收稿日期:2020-09-14 出版日期:2021-02-26 发布日期:2021-02-22
  • 基金资助:
    宁波市科技创新2025重大专项(2018B10021)

Study on Reliability⁃based Feature⁃integrated Design and Performance Analysis for Hollow Slab

YIN Fangfang1, DANG Kaifang1, YANG Weimin1,2, DING Yumei1, XIE Pengcheng1,2()   

  1. 1.College of Mechanical and Electrical Engineering,Beijing University of Chemical Technology,Beijing 100029,China
    2.State Key Laboratory of Organic and Inorganic Composite Materials,Beijing University of Chemical Technology,Beijing 100029,China
  • Received:2020-09-14 Online:2021-02-26 Published:2021-02-22
  • Contact: XIE Pengcheng E-mail:xiepc@mail.buct.edu.cn

摘要:

针对聚合物制品的可靠性、轻量化和力学性能的结构?功能一体化设计,建立了RBTO-MMWDC 连续体结构拓扑优化模型。为便于该设计方法的普及应用,实现了基于优化程序的图形用户界面开发,并选取可靠性指标β=3.0的中空板截面结构为例完成设计。采用有限元仿真方法分别对新型中空结构的静力学性能和动力学响应进行了评价分析。与传统结构相比其抗压性能和抗弯性能分别提升了29.20 %和74.93 %,一阶固有频率实现了100.91 %提升并有效避免于前5阶发生扭转振型。此外,以SLA光敏树脂C-UV9400为原料,采用光固化3D打印技术制备2种中空结构试件样品并利用材料力学性能测试系统对其进行了抗弯强度和刚度试验。结果表明,新型结构抗弯强度和刚度分别实现了60.88 %和55.30 %的显著提升。该研究为面向聚合物制品的结构-功能一体化设计工程应用提供了理论参考与可行性解决方案。

关键词: 可靠性设计, 结构?功能一体化, 中空板, 增材制造, 力学性能

Abstract:

The reliability-based topology optimization based on a modified minimum weight with a displacement constraint model (RBTO-MMWDC) was established for the feature?integrated design of polymer products. In order to facilitate the popularization and application of this design method, a graphical user interface was developed on the basis of an optimization code, realizing the design of hollow slab section structure with a reliability index (β) of 3.0. The mechanical properties of the optimized structure were evaluated and analyzed through finite element simulation. Compared to the traditional structure, the compression resistance and bending resistance properties of the optimized structure were improved by 29.20 % and 74.93 %, respectively. The first?order natural frequency increased by 100.91 %, which effectively avoided the torsional modal shapes in the first five order modes. In addition, the C?UV9400 photopolymer for SLA was adopted as a raw material to prepare the specimens with two hollow slab structures using a stereolithography 3D printing technology. The optimized structure achieved an improvement in bending resistance strength and stiffness by 60.88 % and 55.30 %, respectively. This study provides a theoretical reference and feasible solution for the feature?integrated design of polymer products in the engineering application.

Key words: reliability-based design, feature?integration, hollow slab, additive manufacturing, mechanical property

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