1 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China 2 State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, China
Dynamic and quasi-static compressive performance of integralforming aluminum foam sandwich
1 School of Material Science and Engineering, Hebei University of Technology, Tianjin 300130, China 2 State Key Laboratory of Hydraulic Engineering Simulation and Safety, School of Materials Science & Engineering, Tianjin University, Tianjin 300354, China
摘要 Strain rate sensitivity and deformation mechanism of integral-forming aluminum foam sandwich (IFAFS) under quasistatic and dynamic compression were investigated. Split Hopkinson pressure bar experiments with high-speed video cameras were conducted to analyze strain rate dependency and actual deformation mechanism of IFAFS. X-ray microtomography technique (Micro-CT) based on 3D finite element (FE) was used to study stress and plastic strain contours of IFAFS sample and to predict stress distribution and deformation history under both dynamic and quasi-static loadings. Micro-inertia effect of typical cell structures was quantitatively analyzed by FE simulation. The results showed that IFAFS is sensitive to strain rate where the deformation mode under dynamic loading is different from that observed under quasistatic loading. With strain rate increasing, good metallurgical bonding of face sheet and foam core layer contributed to improving the elastic modulus and peak stress of IFAFS. Furthermore, finite element model confirmed that micro-inertia effect of IFAFS can be ignored during dynamic loading.
Abstract：Strain rate sensitivity and deformation mechanism of integral-forming aluminum foam sandwich (IFAFS) under quasistatic and dynamic compression were investigated. Split Hopkinson pressure bar experiments with high-speed video cameras were conducted to analyze strain rate dependency and actual deformation mechanism of IFAFS. X-ray microtomography technique (Micro-CT) based on 3D finite element (FE) was used to study stress and plastic strain contours of IFAFS sample and to predict stress distribution and deformation history under both dynamic and quasi-static loadings. Micro-inertia effect of typical cell structures was quantitatively analyzed by FE simulation. The results showed that IFAFS is sensitive to strain rate where the deformation mode under dynamic loading is different from that observed under quasistatic loading. With strain rate increasing, good metallurgical bonding of face sheet and foam core layer contributed to improving the elastic modulus and peak stress of IFAFS. Furthermore, finite element model confirmed that micro-inertia effect of IFAFS can be ignored during dynamic loading.
Tao Xu,Zi-chen Zhang,Jian Ding, et al. Dynamic and quasi-static compressive performance of integralforming aluminum foam sandwich[J]. Journal of Iron and Steel Research International, 2023, 30(02): 392-403.
2023, Vol. 30 
