TY - GEN
T1 - Initiation and evolution of transverse matrix cracks in composite laminates
AU - Cortes, Daniel H.
AU - Barbero, Ever J.
PY - 2009
Y1 - 2009
N2 - Damage due to matrix cracks in a laminate with symmetric, but otherwise general laminate stacking sequence (LSS) is predicted by a novel analytical solution for the damage activation function and a return mapping algorithm to restore equilibrium upon damage. In order to use Hahn's energy criterion, the strain energy release rates in mode I and II are calculated analytically from novel expressions for the degrading stiffness of a cracking lamina embedded in a laminate. The degrading stiffness is calculated using shear lag analysis of the cracked lamina. Provision for multiple laminae damaging simultaneously under in-plane state of stress/strain is achieved by a modified return mapping algorithm. A novel definition of composite damage model (CDM)-inspired damage variables allows crack density to be used as state variable. The proposed formulation accurately predicts crack initiation, evolution, degraded stiffness, and stress redistribution.
AB - Damage due to matrix cracks in a laminate with symmetric, but otherwise general laminate stacking sequence (LSS) is predicted by a novel analytical solution for the damage activation function and a return mapping algorithm to restore equilibrium upon damage. In order to use Hahn's energy criterion, the strain energy release rates in mode I and II are calculated analytically from novel expressions for the degrading stiffness of a cracking lamina embedded in a laminate. The degrading stiffness is calculated using shear lag analysis of the cracked lamina. Provision for multiple laminae damaging simultaneously under in-plane state of stress/strain is achieved by a modified return mapping algorithm. A novel definition of composite damage model (CDM)-inspired damage variables allows crack density to be used as state variable. The proposed formulation accurately predicts crack initiation, evolution, degraded stiffness, and stress redistribution.
UR - http://www.scopus.com/inward/record.url?scp=74949106199&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=74949106199&partnerID=8YFLogxK
M3 - Conference contribution
AN - SCOPUS:74949106199
SN - 9781934551059
T3 - International SAMPE Symposium and Exhibition (Proceedings)
BT - SAMPE '09 Spring Symposium Conference Proceedings
T2 - SAMPE '09 Spring Symposium Conference Proceedings
Y2 - 18 May 2009 through 21 May 2009
ER -