Uğur Görkem ÇAKICI, Osman Selim TÜRKBAŞ, Bora YILDIRIM

Üretim Parametrelerinin Termoplastik Kompozitlerin Mekanik Özelliklerine Etkisinin İncelenmesi

Üretim parametreleri, özellikle havacılık sınıfı polieter keton keton (PEKK)/karbon fiber (CF) kompozitlerde termoplastik kompozitlerin mekanik özelliklerinde önemli bir rol oynamaktadır. Sunulan bu çalışmada, farklı sıcaklık değerlerinde konsolide edilen PEKK/CF kompozitlerinin mekanik özellikleri değerlendirilmiştir. Benzer bir basınç profiliyle, kür sıcaklığının PEKK/CF kompozit laminatın gerilme, laminalar arası kesme dayanımı (ILSS) ve düzlem içi kesme dayanımı (IPSS) üzerindeki etkisini belirlemek için çeşitli kür sıcaklıkları uygulandı. Kompozit laminatlardaki gözeneklilik, delaminasyon ve boşluk içeriği, Ultrasonik Test yoluyla NDT yöntemi kullanılarak karakterize edildi. Bu makale, bir polieter keton keton (PEKK)/karbon fiber (CF) kompozitleri kullanılarak otoklav işlemiyle farklı kürleme sıcaklığı numunelerinin karşılaştırılması için üretim kupon test numunelerinin bazı güncel sonuçlarını sunmaktadır. Kür sıcaklığının PEKK/CF kompozitin mekanik özellikleri ve konsolidasyon derecesi üzerindeki etkileri incelenmiştir. PEKK/CF'nin gerilme ve laminalar arası kayma mukavemeti özellikleri, sırasıyla 350°C, 375°C ve 400°C'de farklı kürleme sıcaklık geçmişleri ile hazırlanacak şekilde çalışılmıştır. Yapılan testler ideal kürleme sıcaklığını 400°C derece olarak belirlemiştir.

Anahtar Kelimeler:

Termoplastik Kompozit, PEKK/CF, Mekanik Özellikler, Kürleme Sıcaklığı

An Investigate of the Effect of Manufacturing Parameters on the Mechanical Properties of Thermoplastic Composites

Manufacturing parameters play an essential role in the mechanical properties of thermoplastic composites, especially in aerospace grade polyether ketone ketone (PEKK) / carbon fibre (CF) composites. In this presented study, the mechanical properties of PEKK/CF composites consolidated at different temperature values have been evaluated. Various cure temperatures were applied with an identical pressure profile to determine the effect of cure temperature on tensile, interlaminar shear strength (ILSS) and in-plane shear strenght (IPSS) of PEKK/CF composite laminate. Porosity, delamination and void content within the composite laminates were characterized using the NDT method via Ultrasonic Testing. This paper presents some current manufacturing coupon test specimens for comparing different cure temperature specimens by autoclave process using polyether ketone ketone (PEKK) / carbon fibre (CF) composites. Effects of curing temperature on the mechanical properties and consolidation grade of PEKK/CF composite are studied. Tensile and interlaminar shear strength properties of PEKK/CF have been studied to prepared with different curing temperature histories at 350°C, 377°C, and 400°C, respectively. The tests were carried out have determined the ideal curing temperature as 400°C degrees.

Keywords:

Thermoplastic Composites, PEKK/CF, Mechanical Properties, Cure Temperature,

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