THIN/PROBEAM : A software for fatigue design and analysis of composite rotor blades

Philippidis, TP; Vassilopoulos, AP; Katopis, KG; Voutsinas, SG

dc.contributor.author	Philippidis, TP	en
dc.contributor.author	Vassilopoulos, AP	en
dc.contributor.author	Katopis, KG	en
dc.contributor.author	Voutsinas, SG	en
dc.date.accessioned	2014-03-01T01:44:55Z
dc.date.available	2014-03-01T01:44:55Z
dc.date.issued	1996	en
dc.identifier.issn	0309524X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24520
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0030390133&partnerID=40&md5=763a815f1e19bd95cd74d779c5b2dc9f	en
dc.subject.other	Computer software	en
dc.subject.other	Fatigue of materials	en
dc.subject.other	Laminated composites	en
dc.subject.other	Matrix algebra	en
dc.subject.other	Numerical methods	en
dc.subject.other	Residual stresses	en
dc.subject.other	Rotors	en
dc.subject.other	Shear stress	en
dc.subject.other	Stress analysis	en
dc.subject.other	Wind turbines	en
dc.subject.other	Classical lamination theory (CLT)	en
dc.subject.other	Composite rotor blades	en
dc.subject.other	Turbomachine blades	en
dc.subject.other	analysis	en
dc.subject.other	blades	en
dc.subject.other	fatigue	en
dc.subject.other	wind turbines	en
dc.title	THIN/PROBEAM : A software for fatigue design and analysis of composite rotor blades	en
heal.type	journalArticle	en
heal.publicationDate	1996	en
heal.abstract	A numerical procedure has been developed for an accurate fatigue analysis of wind turbine rotor blades consisting of multicellular thin walled heterogeneous sections made of fiber reinforced laminates and implemented in a computer code consisting of the following steps. First, determination of equivalent cross sectional properties, e.g. bending and torsional stiffness, elastic and mass center, while shear center coordinates are calculated using suitably determined shear flows. The mechanical properties of the ""homogenized"" elements of the cross section are derived using Classical Lamination Theory (CLT) assumptions. The results of this first part can be used along with ordinary beam elements of FEM packages. Based on the applied force and moment distributions at each cross section, normal and shear stress resultants are calculated on the various section elements and ply by ply stress analysis is performed using CLT formulation. In this way, residual stresses from manufacturing of composite laminates and/or moisture swelling, as well as shear coupling and differential Poisson effects are taken into account. Finally, fatigue calculations are performed for each section element based on aforementioned stress resultants definition. Fatigue loads are presented in rainflow matrices and design life assessment is based on the linear Palmgren-Miner damage accumulation rule.	en
heal.journalName	Wind Engineering	en
dc.identifier.volume	20	en
dc.identifier.issue	5	en
dc.identifier.spage	349	en
dc.identifier.epage	362	en