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Performance by Localized Indentation Test of Composite Sandwich of Open-cell Aluminum Foam and Epoxy Resin |
Yajun XIN,Bo XIAO,Shuliang CHENG,Huijian LI |
Key Laboratory of Mechanical Reliability for Heavy Equipments and Large Structures of Hebei Provice, Yanshan University, Qinhuangdao 066004, China |
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Cite this article:
Yajun XIN,Bo XIAO,Shuliang CHENG,Huijian LI. Performance by Localized Indentation Test of Composite Sandwich of Open-cell Aluminum Foam and Epoxy Resin. Chinese Journal of Materials Research, 2016, 30(9): 703-710.
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Abstract By carrying out quasi-static localized indentation tests, failure modes and typical load-displacement curves of composite sandwich of open-cell aluminum foam and epoxy resin were studied. It was also compared with the traditional sandwich panel. The influence of composite layer thickness, indenter type and boundary condition on the localized indentation stiffness, ultimate bearing capacity and energy absorption capacity were analyzed. The results indicate that this kind of composite sandwich panel has good integrality, stability and energy absorption capacity in the condition of indentation. Load-displacement curves have gone through four phases: elastic phase, local damage phase, overall damage phase and punching failure phase. Mechanical properties of sandwich panel have been obviously improved by the over lapped layers of aluminum foam and epoxy resin. Also, there exists an increasing tendency of the mechanical property of the panel with the increase of composite layer thickness. Failure modes and mechanical properties of specimens with spherical indenter are very different from cylindrical indenter and square indenter. Mechanical properties of specimens, which were simply supported are poorer than specimens, which were fully fixed. The stiffness, strength, energy absorption capacity and integrality of composite sandwich panel are superior to those of the traditional sandwich panel.
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Received: 05 April 2016
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Fund: *Supported by the Natural Science Foundation of Hebei Province, No E2013203183 and the Science and Technology Fund of Minstry of Housing and Urban-Rural Development, No2013-K2-2 |
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