粉煤灰空心球/Al复合泡沫材料准静态力学性能及本构模型  

Quasi-static mechanical properties and constitutive model of fly ash cenosphere/aluminum syntactic foam

作　　者：张博一[1,2] 高金涛 王理[1,2] 张箭[1,2] 王伟 武高辉[3] ZHANG Boyi;GAO Jintao;WANG Li;ZHANG Jian;WANG Wei;WU Gaohui(Key Lab of Structure Behavior and Control of China Ministry of Education,Harbin Institute of Technology,Harbin 150090,China;School of Civil Engineering,Harbin Institute of Technology,Harbin 150090,China;Center for Metal Matrix Composite Engineering Technology,Harbin Institute of Technology,Harbin 150001,China)

机构地区：[1]哈尔滨工业大学结构工程灾变与控制教育部重点实验室,哈尔滨150090 [2]哈尔滨工业大学土木工程学院,哈尔滨150090 [3]哈尔滨工业大学金属基复合材料与工程研究所,哈尔滨150001

出　　处：《复合材料学报》2021年第8期2655-2665,共11页Acta Materiae Compositae Sinica

基　　金：国家自然科学基金(51578201,51778196)。

摘　　要：为研究粉煤灰空心球/Al(Fly ash cenosphere/aluminum syntactic foam,FAC/Al)复合泡沫材料静力性能,采用万能试验机对铝基复合泡沫材料进行了准静态轴向压缩性能试验,考察了不同空心球平均粒径(分别为150、200和300μm)对铝基复合泡沫材料变形失效模式及力学性能的影响,并获取了具有不同空心球粒径的复合材料在准静态下的应力-应变曲线,在此基础上分析了空心球粒径大小对复合材料能量吸收性能的影响。试验结果表明,在准静态荷载作用下,随着空心球粒径的增大,复合材料的压缩屈服强度、吸能能力及理想吸能效率有着明显的降低。此外,在获得的应力-应变曲线基础上,采用最小二乘法拟合得到了铝基复合泡沫在准静态荷载作用下的本构方程,并对其进行了验证,结果表明该方程具有较好的拟合度。In order to study the quasi-static performance of fly ash cenosphere/aluminum(FAC/Al)syntactic foam,quasi-static compression performance tests were conducted on the FAC/Al specimens by using a universal testing machine.The effects of different average particle sizes on the deformation and failure modes and mechanical performance of the aluminum matrix composite foam material specimens were investigated,and the stress-strain curves of the material specimens with different particle sizes under quasi-static load were obtained.And based on the stress-strain curves,the effects of particle sizes on the energy absorption performance of the material were analyzed.And the test results show that the compressive yield strength and energy absorption capacity and the ideal absorption efficiency of the material decrease with the increase of the particle sizes.In addition,by using the least square method to fit based on the stress-strain curves,the constitutive equation of FAC/Al under quasi-static load was given and verified,and the results show that the equation has a good fitting.

关 键 词：铝基复合泡沫 准静态压缩 应力-应变曲线 吸能性能 本构方程 

分 类 号：TB331[一般工业技术—材料科学与工程] TB333