Stiffness Changes in Laminates Caused by Intralaminar Cracks and Shear Deformation Academic Article uri icon


  • Abstract An experimental study has been conducted to study stiffness changes in laminates containing inclined (off-axis) plies. The class of laminates studied is glass-epoxy (0, 4, 01/2)s with = 25, 40, 55 and 70. It is found that for < 40 multiple cracks occur in the -plies while for > 40 no cracks are found. However, for all angles the laminate moduli change. A continuum damage mechanics approach is used to calculate stiffness changes due to cracks. In the absence of cracks the shear modulus reduction in the -plies, determined from independent tests on a (45)s laminate, is found to provide good prediction of the observed stiffness changes.

published proceedings

  • Composites and Functionally Graded Materials

author list (cited authors)

  • Varna, J., Akshantala, N. V., & Talreja, R.

citation count

  • 0

complete list of authors

  • Varna, Janis||Akshantala, Nagendra V||Talreja, Ramesh

publication date

  • January 1997