Print Email Facebook Twitter Energy based study of quasi-static delamination as a low cycle fatigue process Title Energy based study of quasi-static delamination as a low cycle fatigue process Author Amaral, L. Yao, L. Alderliesten, R.C. Benedictus, R. Faculty Aerospace Engineering Department Aerospace Structures and Materials Date 2015-06-01 Abstract This work proposes to treat quasi-static mode I delamination growth of CFRP as a low-cycle fatigue process. To this end, mode I quasi-static and fatigue delamination tests were performed. An average physical Strain Energy Release Rate (SERR), derived from an energy balance, is used to characterize the energy released in crack extension. The physical SERR is then compared to the SERRs calculated by the ASTM standard, and the physical background of the standard is questioned. Furthermore, when normalizing the physical SERR for fatigue delamination by the one obtained for quasi-static crack extension, a stress ratio dependence is observed. This stress ratio effect is physically explained to be present due to the relation between quasi-static and fatigue loading at high stress ratios. To reference this document use: http://resolver.tudelft.nl/uuid:23f260da-c0cc-4e23-97c8-57c21b9efa50 Publisher VTT Technical Research Centre of Finland ISBN 978-951-38-7442-1 Source Proceedings of the 34th Conference and the 28th Symposium of the ICAF, Helsinki, Finland, 1-5 June 2015; Authors version Part of collection Institutional Repository Document type conference paper Rights (c) 2015 The Author(s) /islandora/object/uuid:23f260da-c0cc-4e23-97c8-57c21b9efa50/datastream/OBJ/view