Preliminary communicationIn this research, the topology and shape optimization of a MacPherson control arm has been accomplished to achieve lighter weight. Present automotive market demands low cost and light weight component to meet the need of fuel efficient and cost effective vehicle. This in turn gives the rise to more effective use of materials for automotive parts which can reduce the mass of vehicle. Since automotive components are under dynamic loads which cause fatigue damage, considering fatigue criteria seems to be essential in designing automotive components. At first, in order to create severe loading condition for control arm some rough roads are generated through power spectral density. Then, the most critical loading conditions are obtained through multi body dynamics analysis of a full vehicle model. Then, the topology optimization is performed based on fatigue life criterion using HyperMesh software, which resulted in 50 % mass reduction. In the next step a CAD model is created using CATIA software and shape optimization is performed to achieve accurate dimensions with less mass. Keywords: fatigue life; MacPherson control arm; shape optimization; topology optimization Konstrukcijska optimizacija MacPherson upravljačke poluge pod zamornim opterećenjemPrethodno priopćenje U ovom istraživanju izvršena je optimizacija topologije i oblika MacPherson upravljačke poluge u svrhu postizanja manje težina. Postojeće automobilsko tržište traži dijelove niske cijene i male težine, a za potrebe energetski učinkovitog, a jeftinog vozila. To zahtijeva učinkovitiju uporabu materijala za automobilske dijelove koji mogu dovesti do smanjene mase vozila. Budući da su automobilski dijelovi izloženi dinamičkim opterećenjima koja uzrokuju oštećenja zbog zamora, uzimanje u obzir kriterija zamora čini se bitnim u dizajniranju automobilskih dijelova. Kako bi se stvorili što teži uvjeti opterećenja upravljačke poluge, najprije su spektralnom gustoćom snage generirane neravne ceste. Zatim su, dinamičkom analizom karoserije kompletnog modela vozila, dobiveni najkritičniji uvjeti opterećenja. Nakon toga, izvršena je optimizacija topologije pomoću kriterija vijeka trajanja do zamora primjenom HyperMesh softvera, što je rezultiralo smanjenjem mase od 50 %. U sljedećem koraku kreiran je CAD model primjenom CATIA softvera i provedena optimizacija oblika kako bi se dobile točne dimenzije s manje mase.Ključne riječi: MacPherson upravljačka poluga; optimizacija oblika; optimizacija topologije; vijek trajanja do zamora
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