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INTERLAMINAR REINFORCEMENT OF CARBON FIBER COMPOSITES USING ALIGNED CARBON NANOTUBES

Xinchen NiEstelle Kalfon-CohenCarolina FurtadoReed KoppNathan K.FritzAlbertino ArterioGabriel A.ValdesTravis J.HankGregor BostnarM.N.MavrogordatoS.M.SpearingPedro P.CamanhoBrian L.Wardle

Department of Mechanical Engineering, Massachusetts Institute of TechnologyDepartment of Aeronautics and Astronautics, Massachusetts Institute of TechnologyDEMec, Faculdade de Engenharia da Universidade do PortoINEGI, Instituto de Ciência e Inova??o em Engenharia Mecanica e Engenharia IndustrialFaculty of Engineering and the Environment, University of Southampton

摘要:Aligned nanoscale fibers(carbon nanotubes, CNTs) are used to reinforce the interlaminar resin-rich region of aerospace-grade unidirectional carbon fiber laminates in an architecture termed "nanostitching".Nanostitching leads to a hybrid architecture where aligned CNTs(A-CNTs) are integrated at the interface of Carbon Fiber Reinforced Plastic(CFRP) plies.Here we manufacture nanostitched laminates and investigate the effect on laminate strength through ex situ and in situ mechanical testing.Short beam shear(SBS) and double edge notched tensile testing were conducted on both baseline and A-CNT reinforced laminates.No statistically significant change was found in SBS strength, however, a 9% increase in tensile strength was observed in the double edge notched tensile tests.In situ tensile testing of the same double-edge notch configuration utilizing synchrotron radiation computed tomography(SRCT) showed little difference in damage accumulation between baseline and A-CNT reinforced laminates at 80% of failure stress, likely due to a general absence of delamination damage.Future work will focus on acquiring data at stress levels closer to ultimate failure in the double-edge notch configuration, testing configurations that exhibit delamination formation and growth in the damage progression, and improving preliminary modeling(results presented herein) to improve understanding of the different mechanisms at work.
会议名称:

第二十一届国际复合材料大会

会议时间:

2017-08-20

会议地点:

中国陕西西安

  • 专辑:

    工程科技Ⅰ辑

  • 专题:

    材料科学

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    TB332

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