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Poisson's ratio as a sensitive indicator of (fatigue) damage in fibre‐reinforced plastics
Author(s) -
VAN PAEPEGEM W.,
DE BAERE I.,
LAMKANFI E.,
DEGRIECK J.
Publication year - 2007
Publication title -
fatigue and fracture of engineering materials and structures
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.887
H-Index - 84
eISSN - 1460-2695
pISSN - 8756-758X
DOI - 10.1111/j.1460-2695.2007.01095.x
Subject(s) - materials science , stiffness , composite material , poisson's ratio , epoxy , degradation (telecommunications) , poisson distribution , nondestructive testing , strain (injury) , structural engineering , transverse plane , mathematics , computer science , medicine , telecommunications , statistics , engineering , radiology
Even if the extent of damage in fibre‐reinforced plastics is limited, it already affects the elastic properties. Therefore, the damage initiation and propagation in composite structures is monitored very carefully. Beside the use of nondestructive testing methods (ultrasonic inspection, optical fibre sensing), the follow‐up of the degradation of engineering properties such as the stiffness is a common approach. In this paper, it is investigated if the Poisson's ratio can be used as a sensitive indicator of (fatigue) damage in fibre‐reinforced plastics. Static, cyclic and fatigue tests have been performed on [0°/90°] 2s glass/epoxy laminates, and axial and transverse strain were measured continuously. The evolution of the Poisson's ratio ν xy versus time and axial strain ɛ xx is studied. It is concluded that the degradation of the Poisson's ratio can be a valuable indicator of damage, in combination with the stiffness degradation.