中国机械工程 ›› 2023, Vol. 34 ›› Issue (21): 2637-2645.DOI: 10.3969/j.issn.1004-132X.2023.21.014

• 增材制造 • 上一篇    下一篇

数字光处理制备的柔性点阵结构疲劳寿命预测

王炜1;纪小刚1,2;方创1;牛国法1   

  1. 1.江南大学机械工程学院,无锡,214122
    2.江苏省食品先进制造装备技术重点实验室,无锡,214122
  • 出版日期:2023-11-10 发布日期:2023-11-29
  • 通讯作者: 纪小刚(通信作者),男,1977年生,教授。研究方向为逆向工程、计算机辅助设计技术、柔弹性材料增材制造。发表论文40余篇。E-mail:bhearts@jiangnan.edu.cn。
  • 作者简介:王炜,男,1998年生,硕士研究生。研究方向为CAD/CAM、点阵结构等。发表论文3篇。E-mail:6210810109@stu.jiangnan.edu.cn。
  • 基金资助:
    国家自然科学基金(52175234,51105175);江苏省“六大人才高峰”高层次人才项目(2016-JXQC-006)

Fatigue Life Prediction of Flexible Lattice Structures Prepared by Digital Light Process

WANG Wei1;JI Xiaogang1,2;FANG Chuang1;NIU Guofa1   

  1. 1.School of Mechanical Engineering,Jiangnan University,Wuxi,Jiangsu,214122
    2.Jiangsu Key Laboratory of Advanced Food Manufacturing Equipment Technology,Wuxi,
    Jiangsu,214122
  • Online:2023-11-10 Published:2023-11-29

摘要: 针对复杂点阵结构在使用中缓冲减振能力的可靠性问题,提出一种基于Brown-Miller模型的点阵结构疲劳寿命预测方法。以3种单胞周期性扩展的点阵结构为研究对象,通过数值模拟和疲劳试验预测了点阵结构疲劳寿命;深入分析了单胞构型和相对密度对幂律参数的影响,构建了相对密度与疲劳强度的预测模型。研究结果表明,点阵结构的S-N曲线高度符合幂律关系;幂律系数受单胞构型与相对密度共同作用,但指数不受相对密度的影响,而依赖于单胞构型。

关键词: S-N曲线, 疲劳寿命, 点阵结构, 柔性光敏树脂, 数字光处理

Abstract:  Based on Brown-Miller model for complex lattice structures, a fatigue life prediction method was proposed to solve the reliability problem of their damping capacity. The fatigue life for lattice structures of 3 cell arrays was predicted by numerical simulation and fatigue tests. The influence of unit cells configuration and relative density on power-law parameters was analyzed indepth, and a prediction model between relative density and fatigue strength was constructed. The results indicate that the S-N curves of lattice structures conform to a power-law relationship. The power-law coefficient is influenced by both unit cell configurations and relative density, while the power-law exponent is dependent on the unit cell configuration and unaffected by relative density. 

Key words: S-N curve, fatigue life, lattice structure, flexible photosensitive resin, digital light process

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