Mixed Micromechanics and Continuum Damage Mechanics Approach to Transverse Cracking in [S, 90 n] s Laminates
作者： J. Varna , R. Joffe , R. Talreja
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摘要: The stiffness reduction in [S, 90 n ] s laminates due to transverse cracking 90-layers is analyzed using the synergistic continuum damage mechanics (SCDM) and a micromechanics approach. material constants involved SCDM model are determined data for reference cross-ply laminate. constraint efficiency factor, which depends on geometry of neighboring layers, assumed be proportional average crack opening displacement (COD). COD as function effect adjacent layers spacing described by simple power law. closure technique Monte Carlo simulations used evolution: 90-layer divided into large number elements critical strain energy rate G c having Weibull distribution randomly assigned each element. density [02/904] laminate determine parameters. simulated curves combined with CDM predictions obtain versus strain. methodology developed successfully predict [±θ/904] laminates.
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