STRESS ANALYSIS UNDER PRESS - FIT CONDITION IN THE MACHINE ELEMENT MADE OF COMPOSITE MATERIALS

Transfer of the power and motion, shaft-pulley systems is combined different forms. One of them is press fit. In this study, under the inner pressure occurred at the press-fit condition pulley was investigated by the analytic and finite elements methods. In this investigation, the diameter at the shaft (d) and outer diameter (D) ratio was changed with respect to each other in order to investigate stress distribution change. In addition to d/D ratio, computing occurring of stress at the different tightness, the optimum tightness gap was investigated. The fournode isoparametric finite element is used as the solution method. Found result controlled with analytic solution.Now, from the space and automobile industry to food industry the widespread usage for the pulley that is made from metal matrix composite material (steel-aluminium) 0 and 90 degrees reinforcement condition and various tightness solution was made, the press fit condition at the composite was investigated.

KOMPOZÝT MALZEMEDEN YAPILMIÞ MAKÝNE PARÇALARININ SIKI GEÇME DURUMUNDA GERÝLME ANALÝZÝ

Güç ve hareket iletiminde mil-kasnak sistemleri deðiþik þekillerde birleþtirilebilirler. Bunlardan birisi de sýký geçmedir. Bu çalýþmada sýký geçme durumunda oluþan iç basýnç etkisindeki kasnak (kalýn cidarlý silindir) ele alýnýp analitik ve sonlu elemanlar metodu ile incelenmiþtir. Bu inceleme kasnaktaki iç çap (d) ve dýþ çap (D)’ nin birbirine göre oraný deðiþtirilerek gerilme daðýlýmýndaki deðiþmeler, (d/D) oraný yanýnda farklý sýkýlýklarda meydana gelen gerilmeler hesaplanarak optimum sýkýlýk aralýðý araþtýrýlmýþtýr. Çözüm yöntemi olarak dört düðümlü isoparametrik sonlu elemanlar kullanýlmýþtýr. Bulunan sonuçlar analitik çözümle kontrol edilmiþtir. Günümüzde uzay ve otomobil sanayinden gýda sanayine kadar kullanýmý yaygýnlaþmýþ olan metal matrixli kompozit malzemeden (çelik-Alüminyum) yapýlmýþ kasnaklar için 0 ve 90 derece takviye durumlarý ve muhtelif sýkýlýklarda çözümler yapýlýp izotrop malzeme ile mukayese yapýlmýþ, kompozitlerde sýký geçme durumu araþtýrýlmýþtýr.