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Stiffness properties of composite laminates with matrix cracking and interior delamination

โœ Scribed by Ramesh Talreja

Publisher
Elsevier Science
Year
1986
Tongue
English
Weight
909 KB
Volume
25
Category
Article
ISSN
0013-7944

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โœฆ Synopsis

Two modes of damage in composite laminates are considered: the intralaminar damage (matrix cracking) and the interiaminar damage (interior delamination). Using a vectorial representation of damage as internal variables in a phenomenological theory, relationships between the overall stiffness properties and the intensity of damage in the individual modes are determined. These relationships show that the intralaminar damage reduces all elastic mod& for a general orientation of the damage entities (cracks) and changes the iniiial orthotropic symmetry of a laminate. The intedaminar damage, however, does not change the symmetry but reduces the moduii.

Predictions of the elastic moduli changes are compared with experimental results, showing excellent agreement.

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