TEK KATLI YAPRAK YAYLARDA SONLU ELEMANLAR YÖNTEMİ İLE YORULMA ANALİZİ - FATIGUE ANALYSIS OF SINGLE LEAF SPRINGS WITH FINITE ELEMENT METHOD

TEK KATLI YAPRAK YAYLARDA SONLU ELEMANLAR YONTEMI ILE YORULMA ANALIZI Bu calismada yeni yaprak yay tasarimlari icin mumkun olan en az sayida prototipin uretilmesini ve seri uretime en kisa surede gecilebilmesini saglayacak bir yontem gelistirilmesi amaclanmistir. Yorulma omrunu belirlemeden once parabolik yaprak yay tasarimina ve yorulma omrune etki eden faktorler incelenmistir. Tek katli bir parabolik yaprak yay icin sonlu elemanlar modeli uzerinde gerilme ve yorulma analizleri Ansys Workbench 14.5 ve Ansys nCode Design Life 14.5 programlari ile gerceklestirilmistir. Elde edilen sonuclar fiziksel test degerleri ile karsilastirilip yorumlanmistir. Yapilan yorulma omru calismasi agir ve hafif ticari araclarda kullanilan yaprak yaylarin tasarimlarinda prototip uretim sonrasinda parca uzerinde uzun suren denemeler olmadan, yorulma omurlerine sonlu elemanlar analizleri ile ulasilmasinin mumkun oldugunu gostermistir. FATIGUE ANALYSIS OF SINGLE LEAF SPRINGS WITH FINITE ELEMENT METHOD In this study the main goal is to produce a new method which provide to minimize manufacturing and test periods for leaf springs. Before fatigue life determination of leaf springs, parameters which effect on fatigue life prediction and parabolic leaf spring design have investigated. Parabolic leaf spring’s FEM model’sstress and fatigue life analysis have substantiated with Ansys Workbench 14.5 and Ansys nCode Design Life 14.5. The results obtained were verified by comparing the value of physical tests. This finite element fatigue life studies have proved that it is possible to reach fatigue life prediction of the leaf spring used in light and heavy commercial vehicles without longtime experiments tests on track after prototype manufacturing.