DELAMINATION IN COMPOSITES - NONLINEAR EFFECTS Academic Article

abstract

• This study explores the non-linear geometric effects on the displacements, stresses and strain energy release rates of delaminated composite specimens subjected to multi-axial loads. A numerical solution is obtained using an incremental finite element formulation in which large displacements and rotations, but small strains are assumed. An Updated Lagrangian formulation is adopted in the development of the finite element model. The stress field obtained is used with the crack closure technique to evaluate the total strain energy release rate as well as the three components: opening, shearing and twisting modes. Comparisons of non-linear and linear results are presented for tension cases to illustrate the effects of large deformations on the displacements, stresses and strain energy release rates. 1991.

authors

• Ochoa, Ozden

published proceedings

• INTERNATIONAL JOURNAL OF NON-LINEAR MECHANICS

author list (cited authors)

• OCHOA, O. O., & CASTANOPARDO, D.

citation count

• 1

publication date

• January 1991

publisher

• Elsevier  Publisher

keywords

• 40 Engineering
• 4001 Aerospace Engineering
• 4016 Materials Engineering

Digital Object Identifier (DOI)

• 10.1016/0020-7462(91)90062-X

start page

• 319

end page

• 333

volume

• 26

issue

• 3-4

URL

• http://dx.doi.org/10.1016/0020-7462(91)90062-x