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An open-cell aluminum foam filled with silicate rubber (AFFSR) was fabricated by infiltration of the liquid silicate rubber into the open-cell aluminum foam. The experiments were carried out to investigate the compressive behavior and energy absorption characteristics of the material. It is found that the stress--strain response of the AFFSR exhibits five regions including two plateau regimes, which is quite different from the stress--strain curves of many unfilled metallic foams that usually exhibit three distinct regions. The plastic deformation of the AFFSR is prolonged because of the filled silicate rubber, compared with the aluminum foam without such a filler. The AFFSR also exhibits a higher energy capacity than the aluminum foam without filler. Additionally, for the prolonged plateau region in the stress--strain curve, the energy absorption efficiency of the AFFSR maintains a high level (above 0.6) over a wide strain range from 3% to 60%. 相似文献
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Shock wave compression behavior of aluminum foam 总被引:2,自引:0,他引:2
1 INTRODUCTIONInrecentyears ,aluminumfoamsofhighporosityhaveattractedmuchattentionofresearchersonmate rialsduetotheiruniquecompressionbehaviorthatun dergoesalargedeformationatnearlyconstantnominalstress ,andgreatpotentialforapplicationinabsorbingenergyfromimpact[1 3] .Thisapplicationthereforere quirestheknowledgeontheshockcompressionbehav iorofthealuminumfoamundervariousimpactcondi tions.AlthoughanumberofworkonthedynamicpropertyofaluminumfoamshasbeenperformedwithsplitHopkinson pressureba… 相似文献
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采用MTS810.23型万能材料试验机和分离式Hopkinson压杆(SHPB)设备对加压渗流法制备的通孔泡沫铝合金进行了不同应变率下的准静态和动态压缩试验,以研究通孔泡沫铝的动态力学性能。得出了通孔泡沫铝合金的压绵应力-应变曲线。结果表明,不同应变率下的压缩σ-ε曲线均分为线弹性、塑性变形和密实3个阶段。通孔泡沫铝合金表现出明显的应变率效应,其屈服应力和流动应力随应变率的提高而上升,动态压缩下.通孔泡沫铝的屈服应力随相对密度的增大而升高.且其比强度与相对密度的1.5次幂呈线性关系。 相似文献
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泡沫铝合金显微组织和压缩力学性能的研究 总被引:3,自引:1,他引:3
采用Si、Mg及Cu元素进行合金化处理,制备了几种不同力学性能的开孔泡沫铝,并通过准静态压缩实验,研究合金化对泡沫铝压缩力学行为与吸能特征的影响。实验结果表明:采用Si、Mg及Cu元素合金化处理显著改变了泡沫铝的应力-应变行为与吸能特征,使泡沫铝的屈服强度提高,吸能性大幅度上升。另外,还研究了渗流法制备工艺对泡沫铝微观组织和性能的影响,结果显示由于渗流法制备过程特殊的凝固条件,使得泡沫铝的微观组织比相同成分的铸造铝合金的组织明显粗大。 相似文献
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通孔泡沫铝合金的动态压缩力学性能研究 总被引:5,自引:0,他引:5
采用MTS810 2 3型万能材料试验机和分离式Hopkinson压杆 (SHPB)设备对加压渗流法制备的通孔泡沫铝合金进行了不同应变率下的准静态和动态压缩试验 ,以研究通孔泡沫铝的动态力学性能。得出了通孔泡沫铝合金的压缩应力 应变曲线。结果表明 ,不同应变率下的压缩σ ε曲线均分为线弹性、塑性变形和密实 3个阶段。通孔泡沫铝合金表现出明显的应变率效应 ,其屈服应力和流动应力随应变率的提高而上升。动态压缩下 ,通孔泡沫铝的屈服应力随相对密度的增大而升高 ,且其比强度与相对密度的 1 5次幂呈线性关系。 相似文献
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