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    Properties degradation induced by transverse cracks in general symmetric laminates

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    Publication date
    2007
    Author
    Zhang, D.
    Ye, J.
    Lam, Dennis
    Keyword
    Laminate
    ; Crack
    ; State space method
    ; Generalised plane strain
    ; Degradation
    ; Symmetric laminates
    Peer-Reviewed
    yes
    
    Metadata
    Show full item record
    Abstract
    This paper presents the details of a methodology for predicting the thermoelastic properties degradation in general symmetric laminates with uniform ply cracks in some or all of the 90° layers. First, a stress transfer method is derived by using the concept of state space equation. The laminate can be subjected to any combination of in-plane biaxial and shear loading, and the uniform thermal loading is also taken into account. The method takes into account all independent material constants and guarantees continuous fields of all interlaminar stresses across interfaces between material layers. By this method, a laminate may be composed of an arbitrary number of monoclinic layers and each layer may have different material property and thickness. Second, the concept of the effective thermoelastic properties of a cracked laminate is introduced. Based on the numerical solutions of specially designed loading cases, the effective thermoelastic constants of a cracked laminate can be obtained. Finally, the applications of the methodology are shown by numerical examples and compared with numerical results from other models and experiment data in the literature. It is found that the theory provides good predictions of the thermoelastic properties degradation in general symmetric laminates.
    URI
    http://hdl.handle.net/10454/5887
    Version
    published version paper
    Citation
    Zhang, D., Ye, J. and Lam, D. (2007). Properties degradation induced by transverse cracks in general symmetric laminates. International Journal of Solids & Structures, Vol. 44, No. 17, pp. 5499-5517.
    Link to publisher’s version
    http://dx.doi.org/10.1016/j.ijsolstr.2007.01.011
    Type
    Article
    Collections
    Engineering and Digital Technology Publications

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