(東南大學(xué) 材料科學(xué)與工程系， 南京 210096)
摘 要: 研制了高比強(qiáng)多孔鋁合金中空層合圓管，測試了層合圓管的壓縮應(yīng)力—應(yīng)變曲線， 并研究了其性能。結(jié)果表明： 層合圓管的壓縮形變過程經(jīng)歷3個階段，即線彈性階段、 屈服平臺階段和緊實階段； 緊實應(yīng)變可用多孔鋁合金的緊實應(yīng)變表示； 由應(yīng)力—應(yīng)變曲線計算出層合圓管的能量吸收性能， 發(fā)現(xiàn)其吸收能量超過鋁合金空管和中空多孔鋁合金吸收能量之和； 同時其吸能效率高于60%。
關(guān)鍵字: 高比強(qiáng)多孔鋁合金； 中空層合圓管； 壓縮； 吸能能力； 吸能效率
（Department of Materials Science and Engineering,
Southeast University, Nanjing 210096, China）
Abstract: The hollow cylindrical sandwich with high specific strength porous Al alloy core was prepared. The stress—strain curves of the sandwich were measured and the properties of hollow cylindrical sandwich were investigated. The results show that the stress—strain curves of the sandwich consist of elasticity, collapse plateau and densification segments.The densification strain of the hollow cylindrical sandwich can be expressed by using that of porous Al alloy. The energy absorption property was obtained from the stress—strain curves. The energy absorption capacity is higher than the sum of that of the Al alloy tube and the porous Al alloy core. The energy absorption efficiency is higher than 60%.
Key words: high specific strength porous Al alloy; hollow cylindrical sandwich; compression; energy absorption ability; energy absorption efficiency
