Experimental and numerical study of spring-in angle in corner shaped composite parts

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Tezin Türü: Yüksek Lisans

Tezin Yürütüldüğü Kurum: Orta Doğu Teknik Üniversitesi, Mühendislik Fakültesi, Makina Mühendisliği Bölümü, Türkiye

Tezin Onay Tarihi: 2014

Öğrenci: KEREM FURKAN ÇİÇEK

Danışman: MERVE ERDAL ERDOĞMUŞ

Özet:

In this study, spring-in problem encountered in corner shaped composite parts which are made of Hexcel’s AS4/8552 unidirectional (UD) prepregs is investigated. For that purpose, a simple two dimensional (2-D) geometrical model available in the literature is implemented and spring-in is calculated according to this model. Then using autoclave process, U-shaped composite parts are manufactured and spring-in measurements are performed on these parts. Finally, a three dimensional (3-D) numerical model in ABAQUS is constructed by taking tool-part interaction, cure shrinkage and state transformations of resin into account and spring-in simulation is performed. Spring angle of 0.92° found by numerical analysis model is found to be in good agreement with the spring angle of 0.85° found by experimental method. Consequently, an efficient 3-D ABAQUS model is developed for spring-in analysis of corner shaped composite parts.