
Discrete Damage Mechanics
Discrete Damage Mechanics (DDM) calculates the crack density, i.e., number of cracks per unit length, in every lamina of a laminate when subjected to any loading. The only material properties needed ate the intralaminar fracture energy in mode I and II. In most cases, only mode I is needed. The following articles describe the model:  Cortes, D. H. and Barbero, E. J., Stiffness Reduction and Fracture Evolution of Oblique Matrix Cracks in Composite Laminates, Annals of Solid and Structural Mechanics, 1(1): 2940, Jan. 2010.
 Barbero, E. J. and D. H. Cortes, A Mechanistic Model for Transverse Damage Initiation, Evolution, and Stiffness Reduction in Laminated Composites, Composites Part B, 41(2) 124132, March 2010.
 Barbero, E. J., Sgambitterra, G., A. Adumitroaie, and X. Martinez, A Discrete Constitutive Model for Transverse and Shear Damage of Symmetric Laminates with arbitrary Stacking Sequence, Composite Structures 93 (2011) 10211030.
 Sgambitterra, G., Adumitroaie, A., Barbero, E. and Tessler, A., A robust threenode shell element for laminated composites with matrix damage, Composites Part B, 42 (2011) 4150.
 E. J. Barbero and F. A. Cosso, Benchmark Solution for Degradation of Elastic Properties due to Transverse Matrix Cracking in Laminated Composites, Composite Structures, 98(April 2013), 242252.
 E. J. Barbero, F. A. Cosso, and X. Martinez. Identication of fracture toughness for discrete damage mechanics analysis of glassepoxy laminates. Applied Composite Materials, 2014.
 E. J. Barbero and F. A. Cosso. Determination of material parameters for discrete damage mechanics analysis of carbonepoxy laminates. Composites Part B, 56:638646, 2014.
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