泡壁材料性能對(duì)泡沫鋁壓縮性能的影響（英文）
發(fā)布時(shí)間：2018-10-31 13:07
【摘要】：針對(duì)吹氣法制備的高孔隙率閉孔泡沫鋁,通過實(shí)驗(yàn)和有限元分析研究泡壁材料性能對(duì)其壓縮性能的影響。向添加陶瓷顆粒的A356合金熔體中吹氣發(fā)泡制備實(shí)驗(yàn)樣品并進(jìn)行單向壓縮。通過光學(xué)顯微鏡和掃描電鏡觀察泡壁的微觀組織和斷口組織。結(jié)果表明,泡壁中存在的顆粒團(tuán)聚、孔洞等缺陷和氧化膜削弱了其性能,因此,泡沫材料的性能與原材料性能有很大差別。基于原材料性能和實(shí)體材料性能的實(shí)驗(yàn)結(jié)果,對(duì)泡沫鋁理想三維結(jié)構(gòu)進(jìn)行有限元分析。材料的平臺(tái)應(yīng)力與泡沫材料的屈服強(qiáng)度成正比。有限元模擬結(jié)果稍高于實(shí)驗(yàn)結(jié)果,其部分原因是將實(shí)體材料性能看做泡壁材料性能導(dǎo)致的。
[Abstract]:The effect of the properties of foam wall materials on the compressive properties of aluminum foam with high porosity and closed porosity prepared by blowing method was studied by means of experiments and finite element analysis. The experimental samples were prepared by blowing and foaming into the melt of A356 alloy with ceramic particles and subjected to unidirectional compression. The microstructure and fracture surface of the bubble wall were observed by optical microscope and scanning electron microscope. The results show that the properties of foam materials are greatly different from those of raw materials because of the agglomeration of particles, pores and oxide film. Based on the experimental results of the properties of raw materials and solid materials, the ideal three-dimensional structure of aluminum foams is analyzed by finite element method. The platform stress of the material is directly proportional to the yield strength of the foam material. The finite element simulation results are slightly higher than the experimental results, partly because the properties of the solid materials are regarded as the properties of the foam wall materials.
【作者單位】： 清華大學(xué)材料學(xué)院;清華大學(xué)先進(jìn)成形制造教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：Project(2013DFR50330)supported by the International Cooperation Project of Science and Technology Ministry of China
【分類號(hào)】：TG146.21
[Abstract]:The effect of the properties of foam wall materials on the compressive properties of aluminum foam with high porosity and closed porosity prepared by blowing method was studied by means of experiments and finite element analysis. The experimental samples were prepared by blowing and foaming into the melt of A356 alloy with ceramic particles and subjected to unidirectional compression. The microstructure and fracture surface of the bubble wall were observed by optical microscope and scanning electron microscope. The results show that the properties of foam materials are greatly different from those of raw materials because of the agglomeration of particles, pores and oxide film. Based on the experimental results of the properties of raw materials and solid materials, the ideal three-dimensional structure of aluminum foams is analyzed by finite element method. The platform stress of the material is directly proportional to the yield strength of the foam material. The finite element simulation results are slightly higher than the experimental results, partly because the properties of the solid materials are regarded as the properties of the foam wall materials.
【作者單位】： 清華大學(xué)材料學(xué)院;清華大學(xué)先進(jìn)成形制造教育部重點(diǎn)實(shí)驗(yàn)室;
【基金】：Project(2013DFR50330)supported by the International Cooperation Project of Science and Technology Ministry of China
【分類號(hào)】：TG146.21
【共引文獻(xiàn)】
相關(guān)期刊論文 前10條
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