A Plate Finite Element for Modeling Delaminations
- 1 February 1993
- journal article
- research article
- Published by SAGE Publications in Journal of Reinforced Plastics and Composites
- Vol. 12 (2), 227-236
- https://doi.org/10.1177/073168449301200208
Abstract
Laminate constitutive relations are derived for a composite plate, the midplane of which is offset from the reference x-y plane. The equations are similar to the conventional laminates except that the definition of the [A], [B], and [D] matrices are dif ferent. This offsetting procedure is convenient for finite element modeling of delamina tions. Starting with the three-dimensional J-integral, an expression for strain energy release rate for delaminations is derived. Unlike the crack closure method, the G can be derived with one single computation; further, the distribution of G along the delamination front can also be obtained. The method is illustrated for an anisotropic DCB specimen.Keywords
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