尼龙粉末在SLS预热温度下的离散元模型参数确定及其流动特性分析1) |
| 谭援强, 肖湘武, 张江涛, 姜胜强 |
DETERMINATION OF DISCRETE ELEMENT MODEL CONTACT PARAMETERS OF NYLON POWDER AT SLS PREHEATING TEMPERATURE AND ITS FLOW CHARATERISTICS1) |
| Tan Yuanqiang,Xiao iangwu,Zhang Jiangtao,Jiang Shengqiang |
|
| 表1预热温度下尼龙粉末颗粒DEM接触参数 |
| Table 1DEM parameters of nylon powder particles at preheating temperature |
|
| Parameters |
Values |
| powder density/(kg m-3) |
1000 |
| powder shear modulus/MPa |
61 |
| powder Poisson's ratio |
0.35 |
| roller density/(kgm-3) |
7800 |
| roller shear modulus/GPa |
80 |
| roller Poisson's ratio |
0.3 |
| static friction coefficient of powder-roller |
0.51 |
| rolling friction coefficient of powder-roller |
0.15 |
| Hamaker constant of powder-roller/J |
9.72X10-20 |
| static friction coefficient of powder-powder |
0.48 |
| rolling friction coefficient of powder-powder |
0.24 |
| restitution coefficient of powder-powder |
0.11 |
| Hamaker constant of powder-powder/J |
7.21X10-20 |
| charge generation factor |
0.028 |
| powderD50/^m |
50 |
|
|
|