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Characterization of long fiber thermoplastic/metal laminates

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Abstract

Long fiber thermoplastic (LFT) composite/metal laminate (LML) is a hybrid composite consisting of alternate layers of metals such as aluminum and an LFT composite, which combines advantages from both the constituents. The LFT/Al laminates (LMLs) were processed by compression molding and were characterized for their Young’s modulus, mechanical strength, and low-velocity impact (LVI) properties. The average values of specific elastic modulus and specific tensile strength were approximately 20 GPa/(gcm−3) and 108.5 MPa/(gcm−3), respectively. Failure mechanisms included delamination between LFT composite and Al, fiber fracture and pullout in LFT composite, and shear fracture of aluminum and LFT composite layers. Rule-of-mixtures (ROM) predictions of laminate properties in tension compared well with the experimental values. Specific perforation energy of the laminates determined by LVI tests was 7.58 J/(kgm−2), which is significantly greater than that of the LFT composite alone, 1.72 J/(kgm−2). Overall, the LML showed significant improvement in the properties as compared to the LFT composite.

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Acknowledgements

Authors gratefully acknowledge the financial support from Federal Transit Administration (FTA), Contract # W911NF04-2-018. We thank Mr. Pavan Chintalapati for his help with aluminum surface preparation and Dr. Griffin for help in taking SEM pictures.

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Authors and Affiliations

  1. Department of Materials Science and Engineering, The University of Alabama at Birmingham, 1530 3rd Ave S, BEC 254, Birmingham, AL, 35294, USA

    R. R. Kulkarni, K. K. Chawla, U. K. Vaidya & M. C. Koopman

  2. Department of Biomedical Engineering, The University of Alabama at Birmingham, 1530 3rd Ave S, Hoehn 368A, Birmingham, AL, 35294, USA

    A. W. Eberhardt

Authors
  1. R. R. Kulkarni
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  2. K. K. Chawla
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  3. U. K. Vaidya
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  4. M. C. Koopman
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  5. A. W. Eberhardt
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Correspondence to R. R. Kulkarni.

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Kulkarni, R.R., Chawla, K.K., Vaidya, U.K. et al. Characterization of long fiber thermoplastic/metal laminates. J Mater Sci 43, 4391–4398 (2008). https://doi.org/10.1007/s10853-007-2437-5

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  • DOI: https://doi.org/10.1007/s10853-007-2437-5

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