增材制造设计(DfAM)下的金刚石晶格结构研究  

Study on Diamond Lattice Structure Under DfAM

作　　者：阴璇 孟文俊[1,2] 程劲钊 赵晓霞[1,2] YIN Xuan;MENG Wenjun;CHENG Jinzhao;ZHAO Xiaoxia(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Key Laboratory of Intelligent Logistics Equipment in Shanxi Province,Taiyuan University of Science and Technology,Taiyuan 030024,China;Shanxi TrafficVocational and Technical College,Taiyuan 030031,China)

机构地区：[1]太原科技大学机械工程学院,太原030024 [2]太原科技大学智能物流装备山西省重点实验室,太原030024 [3]山西交通职业技术学院,太原030031

出　　处：《机械设计与研究》2021年第1期116-122,共7页Machine Design And Research

基　　金：国家自然科学基金资助项目(51575370);山西省研究生优秀创新项目(2018BY104)。

摘　　要：基于机械零件的增材制造设计,用仿自然式方法设计了一种金刚石晶格结构,对晶胞相对密度和等效弹性模量建立了数学模型,并拟合得到二者关系式,一系列的仿真验证结果显示理论研究所得关系式具有一定的正确性;对金刚石晶格填充结构提出变密度假设,并用仿真和压缩试验的方法进行了验证,结果显示,填充单元密度以受力点为中心渐渐减小的变密度结构拥有更好的抗压性能,同时验证了本文得出的等效弹性模量数学模型具有一定的正确性和适用性。本研究结果可应用于承压机械零件的实体夹层填充,对机械零件进行应力匹配变密度设计,以达到机械结构轻量化的目标。Based on the design for additive manufacturing of mechanical parts,a kind of diamond lattice structure is proposed by imitating nature methodThe mathematical model of relative density and equivalent elastic modulus of unit cell is established,and its relationship is obtained by fitting methodThe relationship is verified by a series of simulation resultsThe hypothesis of variable density for diamond lattice filling structure is put forward and verified by simulation and compression test methodsThe results show that the variable density structure with filling unit density gradually decreasing around the stress point has better compression performance,and the mathematical model of equivalent elastic modulus obtained in this paper has certain correctness and applicabilityThe results of this study can be applied to the solid sandwich filling of pressure mechanical parts,and the stress matching variable density design of mechanical parts can achieve the goal of lightweight mechanical structure.

关 键 词：增材制造设计 金刚石晶格结构 等效弹性模量 变密度设计 

分 类 号：TH122[机械工程—机械设计及理论]