Journal of Materials Science

, Volume 43, Issue 13, pp 4391–4398 | Cite as

Characterization of long fiber thermoplastic/metal laminates

  • R. R. KulkarniEmail author
  • K. K. Chawla
  • U. K. Vaidya
  • M. C. Koopman
  • A. W. Eberhardt
Commonality of Phenomena in Composite Materials


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.


Hybrid Composite Compression Molding Poly Ether Ether Ketone Tensile Side Discontinuous Fiber 



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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Copyright information

© Springer Science+Business Media, LLC 2008

Authors and Affiliations

  • R. R. Kulkarni
    • 1
    Email author
  • K. K. Chawla
    • 1
  • U. K. Vaidya
    • 1
  • M. C. Koopman
    • 1
  • A. W. Eberhardt
    • 2
  1. 1.Department of Materials Science and EngineeringThe University of Alabama at BirminghamBirminghamUSA
  2. 2.Department of Biomedical EngineeringThe University of Alabama at BirminghamBirminghamUSA

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