DEBRİYAJ SİSTEMLERİNDE KULLANILAN DİYAFRAM YAYLARDA FORMUN YORULMA DAYANIMI VE MEKANİK KARAKTERİSTİĞE OLAN ETKİSİNİN TEORİK VE DENEYSEL OLARAK İYİLEŞTİRİLMESİ

Year 2021, Volume: 26 Issue: 3, 1121 - 1138, 31.12.2021

Samet Kabacaoğlu Mahmut Pekedis Hasan Yıldız

https://doi.org/10.17482/uumfd.939663

Cited By: 1

Abstract

Kuru kavramalı debriyaj sistemlerinde yer alan debriyaj baskısının alt bileşeni olan diyafram yay formu, performans ve ömür parametreleri açısından büyük bir role sahiptir. Bu çalışmanın amacı, diyafram yay geometrik formunu ömür parametresi açısından optimize etmektir. Önce, diyafram yayı kuvvet-yer değiştirme ilişkisi deneysel, teorik ve sonlu elemanlar yaklaşımıyla incelenmiştir. Sonra mekanik özelikleri karakterize etmek için diyaframda kullanılan 50CrV4 malzemesine sahip numuneler için çekme ve yorulma testleri gerçekleştirilmiştir. Elde edilen veriler sonlu elemanlar yönteminde kullanılarak simülasyon ve optimizasyon çalışmaları yapılmıştır. Yapılan optimizasyon çalışmalarında diyafram yaya etki eden gerilme değerlerini düşürmek ve yorulma ömrünü arttırabilmek için deney tasarımı yöntemiyle 149 adet dizayn noktası oluşturulmuştur. Yanıt yüzeyi metoduyla optimum diyafram yay tasarımı belirlenmiş ve nihai tasarım belirlenen amaç optimizasyonuyla doğrulanmıştır.

Keywords

Debriyaj, Sonlu elemanlar yöntemi, Diyafram yayı, Yorulma, Optimizasyon

Theoretical and Experimental Improvement of the Effect of the Diaphragm Springs Form Used in the Clutch System on the Fatigue Strength and Mechanical Characteristics

Abstract

Diaphragm spring which is a subcomponent of the clutch cover in dry clutch systems has an important role in performance and life parameters. The main aim of this study is to optimize the geometrical form of this diaphragm spring in terms of life parameter. Initially, the force-displacement relationship has been investigated using the experimental, theoretical and computational approaches. Then, tensile and fatigue tests have been performed for the 50CrV4 specimens used in diaphragm spring to characterize the mechanical properties. The characterized results have been used in the finite element method to perform simulation and optimization tasks. In order to reduce the stress values affecting the diaphragm spring and increase the fatigue life, 149 design points have been created with the design of experiment method. The optimum diaphragm spring design has been determined using the response surface method, and its ultimate design was verified by the specified goal optimization.

Keywords

Clutch, The finite element method, Diaphragm spring, Fatigue, Optimization.

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