梯度孔隙率材料指的是一种孔隙率沿着某个方向按梯度规律变化的材料，兼具梯度材料和多孔材料两者的优点，是一种极具应用潜力的吸声材料。采用分层加成制造的原理，在三坐标数控装置上安装一个热塑性材料挤出喷头，以一定的速度挤出熔融态的热塑性材料细丝，并在数控装置的带动下逐点和逐层堆积材料，最终成形出梯度孔隙率材料。成形试验证明了这种方法是可行的。对所得到的梯度孔隙率材料进行了抗弯和吸声性能的测试，结果表明梯度孔隙率材料具有比刚度高和吸声效果好的优点。另外，这种方法还可用于成形具有更复杂内部结构的材料。
A digital formation method has been proposed based on the principle of layered additive manufacturing. An extrusion head was installed on a 3D numerical control platform, which could extrude thin melting thermoplastic filament. By accumulating material layer by layer carried by the numerical platform, gradient?porosity material part can be formed. Formation experiments have demonstrated that the method is applicable. The anti?bending and sound?absorption performances of the formed samples have been measured, and the results show that the gradient?porosity material has high specific stiffness and good sound?absorption performance. In addition, the method can be used to form material with more complex inner structure.
参考文献
| [1] | 卢天健,何德坪,陈常青,赵长颖,方岱宁,王晓林.超轻多孔金属材料的多功能特性及应用[J].力学进展,2006(04):517-535. |
| [2] | LU T J,HESS A,ASHBY M F.Sound absorption in metallic foams[J]. J. Appl. Phys., 1999, 85:7528-7539.,1999. |
| [3] | LIANG L M,YU H F,WU Q L. Influence of absorbent on electromagnetic wave absorbing property of porous concrete [J], J. of Harbin Institute of Tech. (New Series), 2010, 17(5):647-650.,2010. |
| [4] | 刘华炜,刘学武,张广文.功能梯度材料制备工艺及研究进展[J].机械设计与制造,2012(04):265-267. |
| [5] | 闫文青,朱远志,熊祥.水冷壁管梯度陶瓷涂层的设计与性能研究[J].材料科学与工艺,2013(02):125-130. |
| [6] | ERIKSSON M,RADWAN M,SHEN Z J.Spark plasma sintering of WC, cemented carbide and functional graded materials [J], Int. J. of Refractory Metals and Hard Materials, 2013, 36:31-37.,2013. |
| [7] | POLLIEN A, CONDE Y, PAMBAGUIAN L, et al. Graded open cell alluminium foam core sandwich beams [J].Materials Sci. and Engineering A, 2005, 404:9-18.,2005. |
| [8] | 刘伟伟,黄可,何思渊,何德坪.梯度孔径通孔多孔铝合金的空气吸声性能[J].机械工程材料,2007(12):72-74,78. |
| [9] | 姜生,蔡永东,周祥,晏雄.多层复合吸声结构的制备与性能研究[J].纺织学报,2012(09):20-25. |
| [10] | 刘新金,刘建立,徐伯俊,高卫东.分层多孔材料吸声结构的性能分析[J].振动与冲击,2012(05):106-110,117. |
| [11] | 石勇,朱锡,李永清,李海涛.分层吸声结构的声学设计与性能分析[J].应用声学,2007(05):300-304. |
| [12] | 徐富家,吕耀辉,徐滨士,刘玉欣,舒凤远,何鹏.基于脉冲等离子焊接快速成形工艺研究[J].材料科学与工艺,2012(03):89-93. |
| [13] | TAN J Y, CHUA C K, LENG K F. Fabrication of channeled scaffolds with ordered array of micro-pores through microsphere leaching and indirect Rapid Prototyping technique [J], Biomed Microdevices, 2013, 15:83-96.,2013. |
| [14] | 焦其金.微穿孔组合吸声结构研究[D],南京大学, 2012. JIAO Qijin. A micro-perforated composite sound absorption structure [D], Nanjing University, 2012.,2012. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%