Analysis of transverse lamina cracks in multi-directionally 0°, ±45° and 90° oriented reinforced laminates and a damage tolerance design of composite plates

Authors: Kageyama, Kazuro; Abe, Satoshi; Hiekata, Kazuo

Source: Advanced Composite Materials, Volume 15, Number 3, 2006 , pp. 301-317(17)

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Abstract:

Analytical approach to transverse lamina cracking of ply-groups in a multi-axially (0°, ±45° and 90° oriented) laminated composite material has been proposed in the present paper. Quasi three-dimensional stress and strain analysis of a ply-group with the through-the-width transverse lamina cracks was carried out by using finite differential total force method, assuming periodical arrangement of cracks along the longitudinal direction. Equivalent elastic moduli and Mode I and II energy release rates of the damaged ply group are evaluated. Effects of crack density, in-plane elastic moduli, ply-group thickness and fiber orientation on the equivalent elastic moduli and energy release rate are expressed as interpolation functions, which are applicable to general multi-axial composite laminates. Simple calculation procedure has been proposed for damage tolerance design of laminated composite structures.

Keywords: TRANSVERSE CRACKS; ENERGY RELEASE RATE; STIFFNESS REDUCTION; CRACK DENSITY

Document Type: Research article

DOI: http://dx.doi.org/10.1163/156855106778392106

Publication date: 2006-08-01