根据多孔铝渗流制备过程中孔结构的形成规律建立了单元模型,其中改变渗流压力引起的通孔度变化所产生的孔隙率变化规律符合物理模型.通过对不同孔隙率的孔结构单元模型计算,结合实验研究了孔隙率变化引起的孔结构变化,并计算了通孔多孔铝力学性能的影响规律.结果表明,模型计算得到的材料弹性模量,塑性变形平台应力与实验结果基本相符,孔与孔之间通孔度的变化决定了通孔多孔铝的孔隙率变化,受压缩时在连通孔处的应力集中是其力学性能对孔隙率敏感的直接因素.
参考文献
| [1] | Siyuan He,Xiaolu Gong,Feng Chen,Sound absorption properties of porous aluminium,Journal of Porous Media,Vol.8(6),589(2005) |
| [2] | T.J.Lu,H.A.Stone,M.F.Ashby,Heat transfer in open-cell metal foams,Acta Materialia.,46(10),3619(1998) |
| [3] | T.J.Lu,A.Hees,M.F.Ashby,Sound absorption in metallic foams,Journal of Applied Physics,85,7528(1999) |
| [4] | Donghui YANG,Deping HE,Porosity of porous A1 alloys,Science in China (series.B),44(4),411(2001) |
| [5] | KANG Yingan,ZHANG Junyan,TANG Jiacai,Effect of relative density on the compressive property and energy absorption capacity of aluminum foams,Journal of Functional Materials,02,247(2006)(康颖安,张俊彦,谭加才,相对密度对泡沫铝力学性能和能量吸收性能的影响,功能材料,02,247(2006)) |
| [6] | CAO Xiaoqing,YANG Guitong,Mechanical behaviour and energy absorption capacity of aluminium foam under uniaxial compression,Nonferrous Metals,58(04),9(2006) (曹晓卿,杨桂通,泡沫铝的单向压缩行为及其吸能性,有色金属,58(04),9(2006)) |
| [7] | A.N.Gent,A.G.Thomas,Failure of foamed elastic materials,Journal of Appl Polymer Sci,2(6),354(1959) |
| [8] | L.J.Gibson,M.F.Ashby,The mechanics of threedimensional cellular materials,proceeding of The Royal Society of London,Series A,Mathematical and Physical Sciences,382(1782),43(1982) |
| [9] | C.San Marchi,A.Morteasen,Deformation of open-cell aluminum foam,Acta Materialia,49(19),3959(2001) |
| [10] | M.N.Silva,W.C.Hayes,L.J.Gibson,The effects of nonperiodic microstructure on the elastic properties of twodimensional cellular solids,International journal of Mechanical Sciences,37(11),1161(1995) |
| [11] | Y.X.Gan,C.Chen,Y.P.Shen,Three-dimensional modeling of the mechanical property of linearly elastic open cell foams,International Journal of Solids and Structures,42(26),6628(2005) |
| [12] | CHEN Feng,ZHANG Aiwen,HE Deping,Control of the degree of pore-opening for porous metals,Chinese Journal of Materials Research,13(6),591(1999) (陈锋,张爱文,何德坪,多孔金属通孔度的控制,材料研究学报,13(6),591(1999)) |
上一张
下一张
上一张
下一张
计量
- 下载量()
- 访问量()
文章评分
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%