Journal of Failure Analysis and Prevention

, Volume 17, Issue 5, pp 1011–1018 | Cite as

Delamination Modeling of Double Cantilever Beam of Unidirectional Composite Laminates

  • Mohammed Y. Abdellah
Technical Article---Peer-Reviewed


Delamination crack growth in a double cantilever beam laminated composites is modeled by using simple stress analysis beam theory combined with simple linear elastic fracture mechanics and consideration of the theory of elastic failure in mechanics of material. Furthermore, advanced finite element (FE) model is built up. The FE approach employs surface cohesive zone model that is used to simulate the debonding and crack propagation. The analytical modeling, moreover, cracks growth and strain measurements, which are obtained from FE models, are compared with the available published experimental work. The predicted results give good agreement with interlaminar fracture toughness and maximum load which correspond to crack initiation point. The FE models results agree well with the available experimental data for both crack initiation and propagation.


Fracture toughness Delamination DCB Cohesive surface Crack propagation 

List of symbols


Cohesive stress


Mode I surface release energy or fracture toughness


The load at the end of arm


The Young’s modulus


The second moment of area


Beam width


Beam thickness


Total vertical displacement


Half displacement



\(\partial A\)

Crack extension area


Bending stress


Distance from point load at crack tip


Stored elastic energy


Bending moment in x axis plane


Surface release energy


Un-notch tensile strength


Transverse tensile strength


Effective Young’s modulus


Effective stiffness


Critical initiation traction–separation displacement


Critical crack opening


Normal contact stress


Shear contact stress


Traction contact stress


Mode I, II, and III surface release energy


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Copyright information

© ASM International 2017

Authors and Affiliations

  1. 1.Mechanical Engineering Department, Faculty of EngineeringSouth Valley UniversityQenaEgypt

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