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Volume 116 - November 2012

Contents

Page 5 of 7

Book Reviews

Back matter

  • AER volume 116 issue 1178 Cover and Back matter

  • Published online by Cambridge University Press:
    27 January 2016, p. b1
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Book Reviews

Back matter

  • AER volume 116 issue 1182 Cover and Back matter

  • Published online by Cambridge University Press:
    27 January 2016, p. b1
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Research Article

  • Modelling of impact damage zones in composite laminates for strength after impact

  • R. Olsson
  • Published online by Cambridge University Press:
    27 January 2016, pp. 1349-1365

  • This paper reviews findings on the type, morphology and constitutive behaviour of impact damage zones during loading after impact and their effect on the laminate strength and stability. The paper is limited to tape prepreg based monolithic laminates, although some similarities exist with impact damage in textile based laminates. Damage zones have a complex geometry with several damage types, which results in an interaction and competition between different failure mechanisms, e.g. local and global buckling, compressive failure, and delamination growth. Hence, simplified damage models may provide incorrect predictions of the failure load and failure mechanisms after impact. The constitutive behaviour of damage zones has been studied experimentally in tension and compression using an inverse method, and the results have been compared with detailed FE models of a generic impact damage. The paper is concluded with a discussion on analytical and computational models to predict the resulting strength of impacted laminates.

Book Reviews

Front matter

  • AER volume 116 issue 1180 Cover and Front matter

  • Published online by Cambridge University Press:
    27 January 2016, pp. f1-f4
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Book Reviews

Back matter

  • AER volume 116 issue 1185 Cover and Back matter

  • Published online by Cambridge University Press:
    27 January 2016, pp. b1-b2
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Book Reviews

Back matter

  • AER volume 116 issue 1180 Cover and Backmatter

  • Published online by Cambridge University Press:
    30 March 2016, pp. b1-b3
    • Article
      • You have access
    • PDF
    • Export citation

Front matter

  • AER volume 116 issue 1181 Cover and Front matter

  • Published online by Cambridge University Press:
    27 January 2016, pp. f1-f3
    • Article
      • You have access
    • PDF
    • Export citation

Book Reviews

Research Article

  • Predicting low-velocity impact damage in composites by a quasi-static load model with cohesive interface elements

  • X. Zhang, F. Bianchi, H. Liu
  • Published online by Cambridge University Press:
    27 January 2016, pp. 1367-1381

  • A numerical model is developed for predicting low-velocity impact damage in laminated composites. Stacked shell elements are employed to model laminate plies with discrete interface elements in pre-determined zones to model the onset and propagation of matrix cracks and delamination. These interface elements are governed by a bi-linear cohesive failure law. Cohesive element zone size is determined by a separate finite element analysis using solid elements to identify the stress concentration sites. In order to save the computational effort, low-velocity impact load is modelled by quasi-static loading. Influence of contact force induced friction on shear driven mode II delamination is modelled by a friction model. For a clustered cross-ply laminate, calculated impact force and damage area are in good agreement with the test results. It is shown that matrix cracks should be included in the model in order to simulate delamination in adjacent interface. The practical outcome of this research is a validated modelling approach that can be further improved for predicting low-velocity impact damage in other stacking sequences.

Book Reviews

Page 5 of 7