Print Email Facebook Twitter The concept of fatigue fracture toughness in fatigue delamination growth behavior Title The concept of fatigue fracture toughness in fatigue delamination growth behavior Author Yao, L. Alderliesten, R.C. Benedictus, R. Faculty Aerospace Engineering Department Aerospace Structures & Materials Date 2015-07-19 Abstract This paper provides a study on mode I fatigue delamination growth in composite laminates using energy principles. Experimental data has been obtained from fatigue tests conducted on Double Cantilever Beam (DCB) specimens at various stress ratios. A concept of fatigue fracture toughness is proposed to interpret the stress ratio effect in crack growth. The fatigue fracture toughness is demonstrated to be significantly stress ratio dependent. An explanation for this phenomenon is given using SEM fractography. Fracture surface is observed to be rougher for high stress ratio in comparison with that for low stress ratio, causing the fatigue resistance increase. Therefore, the stress ratio effect in fatigue crack growth can be physically explained by a difference in resistance to crack growth. Subject energy principlesfatigue delaminationfracture toughnesscomposite laminates To reference this document use: http://resolver.tudelft.nl/uuid:6ad6375b-31b8-4b7b-91b3-f68ece3132f0 Publisher ICCM Source ICCM 20: 20th International Conference on Composite Materials, Copenhagen, Denmark, 19-24 July 2015 Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) Files PDF 321090.pdf 495.51 KB Close viewer /islandora/object/uuid:6ad6375b-31b8-4b7b-91b3-f68ece3132f0/datastream/OBJ/view