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)
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谭援强, 肖湘武, 张江涛, 姜胜强
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DETERMINATION OF DISCRETE ELEMENT MODEL CONTACT PARAMETERS OF NYLON POWDER AT SLS PREHEATING TEMPERATURE AND ITS FLOW CHARATERISTICS1)
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Tan Yuanqiang,Xiao iangwu,Zhang Jiangtao,Jiang Shengqiang
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| 表1 预热温度下尼龙粉末颗粒DEM接触参数 |
| Table 1 DEM parameters of nylon powder particles at preheating temperature |
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| 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 | | powder D50/^m | 50 |
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