Fracture Toughness of Symmetric and Asymmetric Layup GFRP Laminates by Experimental and Numerical Methods

  • Ruchir ShrivastavaEmail author
  • K. K. Singh
Conference paper
Part of the Lecture Notes on Multidisciplinary Industrial Engineering book series (LNMUINEN)


FRPs are widely used composite materials, and they offer great advantages of reduction in weight compared to conventional materials. Delamination is seen as one of the biggest causes of its failure. The work herein examines fracture behavior pattern of GFRP laminates, made by reinforcing E-glass plain weave (PW) fiber and epoxy as matrix material. The Plain weaved fiber finds large acceptability in composite industries due to their flexibility, better handling capacity during manufacturing, and better damage tolerance. The laminate was configured in symmetric and asymmetric conditions and made by hand layup assisted by vacuum bagging technique. The laminates configured are quasi-isotropic with zero bending-extension stiffness coupling matrix. Mode-I test was conducted following ASTM D5528 standard in a computerized UTM in displacement control mode. The numerical analysis was done using cohesive zone modeling. The results showed better fracture toughness for asymmetric layup which was due to extensive fiber bridging in these kinds of layups. The numerical results were able to mimic the delamination behavior, and close similarity is obtained in force–displacement curve.


FRP Delamination Fracture toughness 



Carbon fiber


Carbon nanotube


Cup-stacked carbon nanotube


Double-wall carbon nanotube




Halloysite nanotube


Multiwall carbon nanotube


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© Springer Nature Singapore Pte Ltd. 2019

Authors and Affiliations

  1. 1.Department of Mechanical EngineeringIndian Institute of Technology (Indian School of Mines)DhanbadIndia

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