28th Congress of the International Council of the Aeronautical Sciences, 23 - 28 September 2012, Brisbane, Australia
Paper ICAS 2012-8.9.2

APPLICATION OF A SCALAR STRAIN-BASED DAMAGE ONSET THEORY TO THE FAILURE OF A COMPLEX COMPOSITE SPECIMEN

T. Tran, D. Simkins*, S.-H. Lim, D. Kelly, G. Pearce, B. G. Prusty, J. Gosse**, S. Christensen**
UNSW, Australia; *Univ. of South Florida, USA; **The Boeing Company, USA

Keywords: onset theory, distortional invariant, dilatational invariant, meshfree methods

Application of a scalar strain-based damage onset theory to the failure of a carbon fibre specimen loaded in tension is described in this paper. A multi-scale modelling process has been utilized to model the cross-ply laminate. Micromechanical sub-models are derived from a laminate shell or layered solid finite element model. These models enable direct de-homogenization of the strain fields. Strain invariants can then used to predict the onset of damage within both fibre and matrix phases.

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