摘要
熔融沉积增材制造(FDM)的产品力学性能呈现明显的各向异性,传统基于各向同性假设的本构已不再适用于FDM的材料。首先通过拉伸试验获得3D打印的轴拉试件三轴应力应变关系,然后提出基于横观各向同性本构获得3D打印的聚乳酸(PLA)材料弹性常数。相比于各向同性本构而言,横观各向同性本构模型和物性参数更适合于3D打印的PLA材料力学性能表征。
The mechanical properties of the products produced by the fused deposition molding(FDM) had obvious anisotropy,therefore,the traditional constitutive based on isotropic assumption was no longer suitable.Firstly,the three-directional stress-strain curves of three dimensional(3 D) printed axial tensile specimens were obtained by tensile tests.Secondly,the elastic constants of 3 D printed poly lactic acid(PLA) material were calculated based on the transverse isotropic constitutive.Comparing with the isotropic constitutive model,the transverse isotropic constitutive model used in this paper was more suitable for describing the mechanical properties of 3 D printed PLA material.
作者
赵健
刘效朋
王泽武
ZHAO Jian;LIU Xiao-peng;WANG Ze-wu(Department of Chemical Machinery and Safety,Dalian University of Technology,Dalian 116024,China)
出处
《塑料工业》
CAS
CSCD
北大核心
2020年第7期139-143,共5页
China Plastics Industry
基金
辽宁省自然基金指导计划(ZX20180536)
中央高校基本科研业务费(DUT18JC35)。
关键词
增材制造
聚乳酸
各向异性
3D打印
Additive Manufacturing
Polylactic Acid
Anisotropy
Three Dimensional Printing
