Fatigue Damage-Based Topology Optimization of Helicopter Tail Rotor Pitch Arm

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dc.contributor.authorDemir, Süleyman
dc.contributor.authorKurt, Mustafa
dc.contributor.authorKotil, Temel
dc.date.accessioned2023-01-19T12:40:17Z
dc.date.available2023-01-19T12:40:17Z
dc.date.issued2022en_US
dc.departmentFakülteler, Mühendislik Fakültesi, Mekatronik Mühendisliği Bölümüen_US
dc.description.abstractTopology optimization studies have found widespread use with advances in additive manufacturing technologies. A topology optimization method is proposed for the design of a fatigue critical part, namely, a pitch arm made of Al 7050, which transmits the commands to change the pitch attitude to the rotor blades of the helicopter. This study used the bidirectional evolutionary structural optimization (BESO) method with the fatigue failure criterion of a closed Soderberg (CS). The mean stress and stress amplitude values used in the procedure were obtained by applying the Manson-McKnight method. The calculations were performed using a Python-based script compatible with Ansys version 2021 R1 software. In the finite-element calculations, the sensitivity number of the elements was determined using the results of the linear static analysis. A volume constraint was applied in the formulation of the optimization problem to minimize the weight of the structure. The results of the classical topology optimization approach and the developed optimization method were compared. The final geometries of both approaches showed that the ranges of volume reduction differed from each other. It was found that the values for the new fatigue-optimized weight of the pitch arm were 18% higher than the values for the static-based classical topology optimization method. However, in general, the weight of the part obtained as a result of fatigue-based topology optimization was reduced by 34% in total.en_US
dc.identifier.doi10.1061/(ASCE)AS.1943-5525.0001471en_US
dc.identifier.issue5en_US
dc.identifier.scopus2-s2.0-85133838253en_US
dc.identifier.scopusqualityN/Aen_US
dc.identifier.urihttps://hdl.handle.net/11467/6096
dc.identifier.urihttps://doi.org/10.1061/(ASCE)AS.1943-5525.0001471
dc.identifier.volume35en_US
dc.identifier.wosWOS:000899805900025en_US
dc.identifier.wosqualityQ2en_US
dc.indekslendigikaynakWeb of Scienceen_US
dc.indekslendigikaynakScopusen_US
dc.language.isoenen_US
dc.publisherAmerican Society of Civil Engineers (ASCE)en_US
dc.relation.ispartofJournal of Aerospace Engineeringen_US
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanıen_US
dc.rightsinfo:eu-repo/semantics/closedAccessen_US
dc.subjectBidirectional evolutionary structural optimization (BESO) approach; Closed Soderberg (CS) theory; Fatigue-based topology optimization; Helicopter pitch arm; Manson-McKnight methoden_US
dc.titleFatigue Damage-Based Topology Optimization of Helicopter Tail Rotor Pitch Armen_US
dc.typeArticleen_US

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