Inter-relationships among elastic constants for symmetrical or unsymmetrical laminates with cracked 90-plies

BARULICH, NESTOR DARÍO; GODOY, LUIS AUGUSTO; DARDATI, PATRICIA MÓNICA

MECHANICS OF ADVANCED MATERIALS AND STRUCTURES

TAYLOR & FRANCIS INC

Lugar: Londres; Año: 2018

1537-6494

The relations between the stiffness components of a symmetrical or unsymmetrical laminate having transverse matrix cracks only in the 90-degree laminas are explored in this work. The crack closure condition for these laminates under membrane and bending deformations is established to obtain the inter-relationships. These equations also link the in-plane equivalent Young?s moduli and the Poisson?s ratios of balanced symmetric laminates. Cracks in off-axis laminas are not considered here. The present relations are validated using numerical data reported in the literature. Each inter-relationship can be used to obtain one elastic property when other property was experimentally measured or analytically calculated.