Energy Release Rate Determination for Edge Delamination under Combined in-Plane, Bending and Hygrothermal Loading. Part II-Two Symmetrically Located Delaminations
- 1 August 1994
- journal article
- research article
- Published by SAGE Publications in Journal of Composite Materials
- Vol. 28 (14), 1371-1392
- https://doi.org/10.1177/002199839402801405
Abstract
Edge delamination in composite laminates subjected to combined in-plane, bending and hygrothermal loading is analyzed using a crack tip element approach. It is assumed that two delaminations exist which are symmetrically located with respect to the midplane of the laminate. It is shown that, under pure bending, a linear analysis indicates that one of the delaminations generally has a positive mode I stress intensity factor, whereas the other crack generally has a negative mode I stress intensity factor. This indicates that crack face compression exists and an analysis incorporating crack face contact constraints is required to accurately obtain energy release rates. However, for many cases of bending combined with in-plane loading or uniform temperature or moisture change, both cracks have a tendency to open. General expressions are derived for the total energy release rate and the individual mode I and mode II components under these conditions. Specific example problems and results are presented.Keywords
This publication has 8 references indexed in Scilit:
- Influence of the Resin on Interlaminar Mixed-Mode FracturePublished by ASTM International ,2008
- Comparisons of Various Configurations of the Edge Delamination Test for Interlaminar Fracture ToughnessPublished by ASTM International ,2008
- Energy Release Rate Determination for Edge Delamination under Combined In-Plane, Bending and Hygrothermal Loading. Part I-Delamination at a Single InterfaceJournal of Composite Materials, 1994
- Prediction of Energy Release Rate for Mixed-Mode Delamination Using Classical Plate TheoryApplied Mechanics Reviews, 1990
- Interlaminar Fracture Analysis of Composite Laminates Under Bending and Combined Bending and ExtensionPublished by ASTM International ,1988
- Mixed-Mode Strain-Energy-Release Rate Effects on Edge Delamination of CompositesPublished by ASTM International ,1984
- Characterization of Delamination Onset and Growth in a Composite LaminatePublished by ASTM International ,1982
- A finite element calculation of stress intensity factors by a modified crack closure integralEngineering Fracture Mechanics, 1977