The paper presents a beam-theory based method to partition fracture modes in planar laminated beams affected by through-the-width delaminations. According to classical laminated beam theory, the axial, shear and bending deformabilities, as well as bending-extension coupling, are taken into account. The kinematics of crack growth is analysed by defining the crack-tip displacement rates as the relative displacements at the crack tip per unit crack extension. Besides, the crack-tip forces exchanged between the separating laminates are computed. Lastly, by considering the work done by the crack-tip forces for the corresponding crack-tip displacement rates, explicit expressions for the energy release rate and its modal contributions are deduced.
A beam-theory based method to partition fracture modes in delaminated beams
VALVO, PAOLO SEBASTIANO
2009-01-01
Abstract
The paper presents a beam-theory based method to partition fracture modes in planar laminated beams affected by through-the-width delaminations. According to classical laminated beam theory, the axial, shear and bending deformabilities, as well as bending-extension coupling, are taken into account. The kinematics of crack growth is analysed by defining the crack-tip displacement rates as the relative displacements at the crack tip per unit crack extension. Besides, the crack-tip forces exchanged between the separating laminates are computed. Lastly, by considering the work done by the crack-tip forces for the corresponding crack-tip displacement rates, explicit expressions for the energy release rate and its modal contributions are deduced.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
