外力压缩下FDM构件失效分析  

Failure analysis of FDM components under external compression

作　　者：王铎 沈振辉[1] 杨拴强[1] WANG Duo;SHEN Zhenhui;YANG Shuanqiang(Institute of Industrial Technology, College of Engineering, Fujian Jiangxia University, Fuzhou 350108, China)

机构地区：[1]福建江夏学院工程学院工业技术研究所,福建福州350108

出　　处：《福建工程学院学报》2021年第1期32-36,共5页Journal of Fujian University of Technology

基　　金：福建江夏学院科研人才培育项目(JXZ2019014);福建省中青年教师教育科研项目(JAT190464)。

摘　　要：为探究FDM零件压缩作用下连续变形失效的机理,对125种不同构型的零件压缩实验比较力学性能。基于正交实验设计理论,通过多因素组合分析确定零件连续变形失效原因。正交实验结果表明,抗压缩强度影响从大到小排序为层片厚度、材料种类、填充率、打印质量。采用仿真手段模拟了压缩变形后微观失效的变化规律。结果表明,材料进入塑性阶段必须考虑损伤形成的影响,塑性阶段后促进损伤扩展,应防止构件出现塑性过程导致局部失效破坏,验证了模拟方法的合理性。In order to explore the mechanism of continuous deformation failure of FDM parts under compression,the mechanical properties of 125 parts with different configurations were compared.Based on the theory of orthogonal experimental design,the causes of continuous deformation failure of parts were determined by the combination analysis of various factors.Results of the orthogonal experiment show that the thickness of laminate is the most important factor affecting the compressive strength,followed by the type of material,and then the filling rate,and finally the printing quality.The change law of micro failure after compression deformation was simulated.Simulation results show that the impact of damage formation must be considered when the material enters the plastic stage,and the damage expansion can be promoted after the plastic stage.The plastic process of the component should be avoided,which would lead to local failure.The rationality of the simulation method was verified.

关 键 词：FDM 压缩实验 构件 失效分析 

分 类 号：TQ323[化学工程—合成树脂塑料工业]