Prediction of fatigue damage in tapered laminates

Seyed Aydin Raeis Hosseiny, Johnny Jakobsen

Research output: Contribution to book/anthology/report/conference proceedingConference abstract in proceedingResearch

Abstract

Effective implementation of ply-drops configurations substantially improve the damage tolerant design of flexible and aero-elastic wind turbine blades. Terminating a number of layers for an optimized blade design creates local bending effects. Inter-laminar stress states in tapered areas give rise to delamination and premature structural failure. Precise calculation of the stress levels for embedded ply-drops is required to predict failure initiation within acceptable limits.
Multi-axial stress states in orthotropic laminates subjected to diverse loading mechanisms nucleate microscopic cracks. By increasing the cracks density, damage occurs when residual material properties reduce to a critical level. Residual strength and stiffness of simple laminates are assigned in a set of fatigue failure criteria to assess the remaining life of the components by increasing number of loading cycles. The mode and position of damage initiation in ply-drops area is predicted accordingly.
Original languageEnglish
Title of host publication16th Internal symposium, DCAMM
Publication dateMar 2017
Publication statusPublished - Mar 2017
Event16th Internal DCAMM Symposium - Hotel Comwell, Middelfart, Denmark
Duration: 13 Mar 201715 Mar 2017
http://www.dcamm.dk/-/media/Sites/DCAMM/Symposia/Busliste/Programme.ashx?la=da

Conference

Conference16th Internal DCAMM Symposium
LocationHotel Comwell
CountryDenmark
CityMiddelfart
Period13/03/201715/03/2017
Internet address

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