摘要
本文通过实验方法,研究了熔融沉积3D打印PLA杆件的材料力学性能,对填充率为15%、填充形式为方形网格填充的3D打印杆件进行了拉伸和压缩试验,分析了载荷与变形、应力与应变间的关系,并计算相应长度时的弹性模量、强度极限、拉压刚度及近似泊松比。结果表明,3D打印PLA杆件在拉伸时存在较为明显的蠕变现象,在压缩时也存在类似的现象;杆件抗压极限约为抗拉极限的7倍左右,其承压能力远高于抗拉能力。
In this paper,the mechanical properties of fused-deposited 3D printed PLA levers were studied by experimental methods.Tension and compression tests were carried out on 3D printed levers of square grid with filling rate of 15%.The relationships between load and deformation,stress and strain were analyzed,and the elastic modulus,intensity limit,tension and compression stiffness and approximate poisson's ratio were calculated.The results show that there is obvious creep phenomenon in the tension process of 3D printed PLA levers and similar phenomenon in the compression process.The compression limit of the lever is about 7 times of the tension limit,and its hearing capacity is much higher than the tension capacity.
作者
王富伟
朱书桓
韦明帝
罗天身
Wang Fuwei;Zhu Shuhuan;Wei Mingdi;Luo Tianshen(School of Mechanical and Electrical Engineering,North Minzu University,Yinchuan,750021)
出处
《中阿科技论坛（中英阿文）》
2018年第4期34-36,10044-10047,共7页
China-Arab States Science and Technology Forum
关键词
熔融沉积
3D打印
力学性能
PLA杆件
fused deposition
3D printing
Mechanical properties
PLA levers
