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3D finite element analysis of stress distributions and strain energy release rates for adhesive bonded flat composite lap shear joints having pre-existing delaminations

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Abstract

The rate of propagation of embedded delamination in the strap adherend of lap shear joint (LSJ) made of carbon/epoxy composites has been evaluated employing three-dimensional non-linear finite elements. The delamination has been presumed to pre-exist in the thin resin layer between the first and second plies of the strap adherend. The inter-laminar peel and shear stress distributions have been studied in details and are seen to be predominantly three-dimensional in nature. The components of strain energy release rate (SERR) corresponding to the opening, sliding and cross sliding modes of delamination are significantly different at the two fronts of the embedded delamination. The sequential release of multi-point constraint (MPC) finite elements in the vicinity of the delamination fronts enables to simulate the growth of the delamination at either ends. This simulation procedure can be utilized effectively for evaluation of the status of the structural integrity of the bonded joints.

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Authors and Affiliations

  1. School of Mechanical Sciences, I I T, Bhubaneswar, 751013, India

    S. K. Parida

  2. School of Mechanical Sciences, Indian Institute of Technology, Bhubaneswar, 751013, India

    A. K. Pradhan

Authors
  1. S. K. Parida
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  2. A. K. Pradhan
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Correspondence to S. K. Parida.

Additional information

Recommended by Associate Editor Youngseog Lee

Sambit Kumar Parida is currently working as a Research Scholar in School of Mechanical Sciences, IIT Bhubaneswar. His research interest is delamination and adhesion failure studies in adhesive bonded joints of FRP composite structures.

Arun Kumar Pradhan is currently working as Assistant Professor in School of Mechanical Sciences, IIT Bhubaneswar. His area of interest is fracture mechanics, delamination studies, solid mechanics, smart composites and structures.

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Parida, S.K., Pradhan, A.K. 3D finite element analysis of stress distributions and strain energy release rates for adhesive bonded flat composite lap shear joints having pre-existing delaminations. J Mech Sci Technol 28, 481–488 (2014). https://doi.org/10.1007/s12206-013-1116-5

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  • DOI: https://doi.org/10.1007/s12206-013-1116-5

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