测量了新型轻质(0.14～0.09ρ0,ρ0为纯铝的密度)高强度胞状铝合金(ZL11l)的压缩应力(σ)-应变(ε)曲线,研究了材料的能量吸收性能与密度的关系.胞状铝合金的压缩σ-ε曲线与胞状纯铝相似分为三个部分:弹性阶段、平台阶段和压实阶段.胞状铝合金的压缩屈服强度σs比后者高40%以上,其σ-ε曲线呈锯齿状,平台斜度(dσ/dε)比后者小,因而具有更高的能量吸收能力(C)和能量吸收效率(e),当ε为0.15～0.6时吸能效率达到峰值0.85.
参考文献
| [1] | M.F.Ashby, A.G.Evans, N.A.Fleck, L.J.Gibson, J.W.Hutchinson, H.N.G.Wadley, Metal Foams: a Design Guide. (Boston, B-H press, 2000) p.1 |
| [2] | L.J.Gibson, M.F.Ashby, Cellular Solids-Structure and Properties, Second Edition, (Great Britain, Cambridge University Press, 1999) p.5 |
| [3] | WU Zhao-jin, HE Deping, Changes in Porosity of Foamed Al during Solidification, Chinese Science Bulletin,45(18), 1667(2000) |
| [4] | YANG Donghui, He Deping, Porosity of Porous Al Alloy, Science in China (B), 44(4), 411(2001) |
| [5] | Elliott, J.C. US Patent, 2751289, (1956) |
| [6] | WANG Bin(王斌), HE Deping(何德坪), SHU Guangji(舒光冀), Compressive Property and EnergyAbsorption of Foamed Al Alloy (泡沫的压缩性能及其能量吸收), Acta Metallurgica Sinica(金属学报),36(10), 1037(2000) |
| [7] | H.Fusheng, Z.Zhenggang, The Mechanical Behavior of Foamed Aluminum, Journal of Materials Science, 34,291(1999) |
| [8] | SONG Zhenlun(宋振伦), HE Deping(何德坪), Effects of Viscosity on Pore Structure in Foaming Process of Molten Aluminum(铝熔体泡沫形成过程中粘度对孔结构的影响), Chinese Journal of Materials Research(材料料研究学报), 11(3), 275(1997) |
| [9] | A.McIntyre, G.E.Anderton, Fracture Properties of a Rigid Polyurethane Foam Over a Range of Densities Polymer, 20, 247(1979) |
| [10] | G.J.Davies, Shu Zheng, Metallic Foams: Their Production, Properties and Applications, Journal of Materials Science 18, 1899(1983) |
| [11] | M.F.Ashby, The Mechanical Properties of Cellular Solids, Metallurgical Transaction A, 14A, 1755(1983) |
| [12] | J.Miltz, G.Gruenbaum, Evaluation of Cushioning Properties of Plastic Foams From Compressive Measurements, Polym Eng Sci, 21, 1010(1981) |
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%