Journal
INTERNATIONAL JOURNAL OF FATIGUE
Volume 31, Issue 6, Pages 1095-1101Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ijfatigue.2008.05.011
Keywords
Clamped bending; Composites; Carbon fibre; PPS
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After developing a damage model, validation of this model is a necessity. This validation should preferably be done under loading conditions which are different from the ones used for the development of the model. This study investigates whether a special design of a bending setup is suited for the mechanical testing of thin fibre-reinforced composites with a low bending stiffness and the validation of fatigue material models, developed in uni-axial loading conditions. First, the disadvantages of a three-point bending setup for thin laminates are commented on. Then, a four-point bending setup is discussed, for which interestingly enough, the finite-element model can be simplified. Clamped supports are added to decrease the midspan displacement. This is followed by the discussion of the clamped three-point bending setup. It may be concluded that the clamped three-point bending setup is very promising for experimental work, since it increases the measured loads and decrease, the midspan displacement with respect to the regular three-point bending setup, although further modification of the setup is necessary to avoid slipping in the grips. The material used for this study was a carbon fabric-reinforced polyphenylene sulphide. (C) 2008 Elsevier Ltd. All rights reserved.
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