Hasarlı boruların tamirinde yama malzemesinin yapıştırıcı üzerine etkilerinin incelenmesi

İç basınca maruz borular sıcaklık ve basıncın değişmesi sonucunda hasara uğramaktadır. Hasara uğrayan bu boruların onarılması son yıllarda hemen hemen her türlü alanda yaygın bir şekilde kullanılmakta olan yapıştırma bağlantılarıyla yapılmaktadır. Yapıştırma bağlantılarında birleştirilecek olan malzemeler aynı türden ya da farklı türden olabilmektedir. Yapıştırıcılar farklı malzemelerde farklı mukavemet değerleri sergileyebileceğinden dolayı hasara uğramış borunun yapıştırıcı ile tamir edilmesinde malzeme seçimi büyük önem taşımaktadır. Bu çalışmada, hasara uğramış galvanizli çelik boruların tamirinde kompozit, alüminyum ve çelik olmak üzere üç farklı yama malzemesi seçilerek yapıştırıcı üzerinde nasıl bir mekanik davranış sergileyeceği araştırılmıştır. İç basınca maruz boru tesisatlarında meydana gelen hasarlar, farklı yama malzemeleri kullanılarak tek tip yapıştırıcı ile birleştirilmiş nümerik ve deneysel olarak incelenmiştir. Bunun için galvanizli borular üzerine çatlak oluşturulmuş 7 (2 mm), 9 (2.6 mm) ve 11 (3.2 mm) tabakadan oluşan düz örgülü karbon fiber kompozit yamalar, alüminyum yamalar ve çelik yamalar iki bileşenli akrilik yapıştırıcı (DP810) ile birleştirilmiştir. Tamir edilen borulara iç basınç uygulanmış, yama kalınlığı yama bindirme açıları ve bindirme uzunluklarına bağlı olarak yapıştırıcı üzerinde etkileri incelenmiştir.

Effects of patch material on the adhesive in the repair of damaged pipes

Pipes exposed to internal pressure are damaged due to the change in temperature and pressure. In the repair of these damaged pipes, adhesively bonded joints, which have been widely used in almost all kinds of fields in recent years, are used. Materials to be bonded in adhesively bonded joints may be of different types or the same type. Material choice has great importance in the repair of damaged pipe with adhesive because adhesives may exhibit different strength values in different materials. In this study, three different patching materials including composite, aluminum and steel were selected for the repair of damaged galvanized steel pipes, and how they would exhibit a mechanical behavior on the adhesive was investigated. Damages that had occurred in pipe installations exposed to internal pressure were bonded with a uniform adhesive and investigated numerically and experimentally. Therefore, cracks were formed in the galvanized pipes, and flat braided carbon fiber composite, aluminum and steel patches consisting of 7 (2 mm), 9 (2.6 mm) and 11 (3.2 mm) layers were bonded with two-component acrylic adhesives (DP810). Internal pressure was exerted to the repaired pipes, and the effects on the adhesive of patch material depending on the patch thickness, overlapping angles and overlapping length were investigated.

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