玄武岩鳞片合金闭孔泡沫铝的静、动态力学性能试验研究  

EXPERIMENTAL RESEARCH ON STATIC AND DYNAMIC MECHANICAL PROPERTIES OF CLOSED CELL ALUMINUM FOAM WITH BASALT SCALE

作　　者：杨烨凯 刘中宪 李军 苏宇 吴诚 YANG Yekai;LIU Zhongxian;LI Jun;SU Yu;WU Cheng(School of Civil Engineering, Tianjin Chengjian University, Tianjin Key Laboratory of Civil Structure Protection and Reinforcement, Tianjin 300384, Chin)

机构地区：[1]天津城建大学土木工程学院天津市土木建筑结构防护与加固重点实验室

出　　处：《工业建筑》2018年第5期178-184,155,共8页Industrial Construction

基　　金：国家重点基础研究发展计划(2015CB058002);国家自然科学基金项目(51578362)

摘　　要：为研究玄武岩鳞片闭孔泡沫铝静态力学性能,并分析其相对密度和应变变化率对泡沫铝动态吸能特性和吸能效率的影响,分别通过液压试验机和分离式霍布金森（SHPB）压杆对不同尺寸玄武岩鳞片闭孔泡沫铝进行静态压缩试验和高应变变化率冲击试验。结果表明：在准静态压缩作用下,泡沫铝相对密度对吸能性和吸能效率有一定的影响,相对密度与吸能性正相关,与吸能效率负相关。在相对密度较低时,玄武岩鳞片闭孔泡沫铝的吸能性能明显优于普通合金闭孔泡沫铝,相同密度下平均高出60%。高应变变化率情况下,相对密度相同时,玄武岩鳞片闭孔泡沫铝在相对更高的应变变化率下表现出更好的吸能性,全压缩过程后,高应变变化率作用下的吸能性较低应变变化率下的约高出75%。而吸能效率在相同应变时的表现则跟应变变化率负相关。在相同应变下,较低应变变化率吸能效率高出8.7%。不同应变率下泡沫铝压缩程度明显不同,在达到最大应变时,越高应变变化率下吸能效率更高。In order to study the static mechanical properties of closed cell aluminum foam with basalt scales,also analyze the effect of the relative density and strain rate on the dynamic energy absorption characteristics and energy absorption efficiency,respectively,adopting the hydraulic testing machine and SHPB pressure bar,the static compression test and high strain rate impact test on different sizes of closed cell aluminum foam with basalt scales were carried. The experimental results showed that under the quasi-static compression,the relative density of aluminum foam energy absorption and energy absorption had a certain impact,the relative density was positive correlation with energy absorption,and the energy efficiency was negative correlation with the relative density. The energy absorption of relatively lower density of basalt scale aluminum foam was significantly better than that of the ordinary alloy aluminum foam,the average energy absorption increased by 60% for the same density. In the case of higher strain rate,the aluminum foam with basalt scale had a higher energy absorption at a relatively higher strain rate when the relative density was the same,the energy absorption was 75% higher for aluminum foam with basalt scale at higher strain rate than that at lower strain rate after the full compression process. The energy efficiency at the same strain was negative correlation with the strain rate. At the same strain,the energy absorption efficiency for the lower strain rate was 8. 7% higher than that of higher strain. However,the compression degree of aluminum foam was significantly different at different strain rate,before the maximum strain,the higher strain rate was higher energy absorption efficiency.

关 键 词：玄武岩鳞片 泡沫铝 静力学 霍布金森压杆 动力学 相对密度 吸能性 吸能效率 

分 类 号：TU552[建筑科学—建筑技术科学]