Bending Behavior of Closed-Cell Aluminum Foam Bar with Thin Outer Wall
Aluminum foam bar(AFB)with thin outer wall was prepared by melt foaming method.The effect of span,diameter and porosity on its bending deformation behavior was investigated by cantilever beam bending experiment and finite element simulation.Bending deformation behavior was recorded by high-speed camera and the relationship between load and displacement was obtained.X-ray micro-computer tomography(Micro-CT)technique based on 3D finite elements was selected to scan and to reconstruct AFB,by which numerical simulation was carried out.The results show that span has important effect on the failure behavior and the increased span leads to decreased energy absorption capacity.In addition,increased diameter and relative density contribute to peak load improvement.Finite element simulation results match well with the expcrimcntal results,which clarifies that cell walls fail due to different types of stress during the bending process.Crack propagation follows the weakest cell walls path link during the failure process.
aluminum foam barcantilever beam bendingfailure mechanismfinite element simulation
王增、张赞、刘楠楠、夏兴川、张子晨、丁俭、王佳成、崔李鹏、邱子轩、王玉江、刘永长
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河北工业大学材料科学与工程学院,天津 300401
邢台学院物理与电子工程学院,河北邢台 054001
陆军装甲兵学院装备再制造技术国防科技重点实验室,北京 100072
天津大学材料科学与工程学院,天津 300350
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泡沫铝棒 悬臂梁弯曲 失效机制 有限元模拟
Military-Civilian Integration Development of Hebei Province河北省重点研发计划
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