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Expedient repair of hydro-pneumatic pipes with adhesives

Smal T., Rośkowicz M.

Journal of KONES

2011

Vol. 18, No. 1

573-578

The paper presents research on expedient repairs, including battle damage repair methods of hydro-pneumatic pipes with adhesives. According to analyzed publications concerning battle damage of military equipment, various pipes and lines, which are used in military vehicles and aircrafts, are one of the most often damaged parts during combat operations. During experimental tests, the efficiency of damaged pipes repair was researched. Various methods of repair depending on pressure in the pipe and sort of damage were considerate. To conduct experimental tests of repair two kind of adhesive were used. It was composite adhesive Belzona 1111, which is used by many armies of NATO, and epoxy adhesive Epidian 57 hardened with Z-1. The conducted experiments proofed that both low pressure and even high pressure hydro-pneumatic pipes can be repaired in the field conditions with considered adhesives. Presented methods of repairs can be very useful especially during combat operations when the access to spare parts and disposal time is limited. Using to repair the manufacturer’s composite adhesive without any strengthening should be limited to low pressure pipes. The specific properties of epoxy adhesives must be considered before applying to repair, especially change of mechanical and utilitarian features at higher temperature.

Kleje kompozytowe utwardzane produktami aminoglikolizy poli(tereftalanu etylenu)

Pilawka R., Fabrycy E., Spychaj T.

Kompozyty

2003

R. 3, nr 7

221-224

Badano kompozycje i kompozyty epoksydowe utwardzane produktami aminoglikolizy poli(tereftalanu etylenu) trietano-loaminą (PET/TEA), N-metylodietanoloaminą (PET/NMDA) oraz N,N,N',N'-tetra(2-hydroksyetyIo)etylenodiaminą (PET/EtEDA). Jako żywic użyto Epidianu 6 oraz Epidianu 2, jako napełniaczy: modyfikowanych (silanizowanych) krzemionek - produktów firmy Quarzwerke. Do kompozytów wprowadzano 5, 25, 50 lub 65 części napelniacza na 100 części wagowych żywicy epoksydowej. Utwardzacze stosowano w różnych udziałach wagowych od 10 do prawie 30 g utwardzacza na 100 g żywicy. Badano przebieg procesu sieciowania oraz wytrzymałości spoiny klejowej kompozycji klejowych w temperaturze pokojowej oraz w 40 i 70°C.

The epoxy compositions and composites hardened with the products of aminoglycolysis of poly(ethylene terephthalate) using: triethanolamine (PET/TEA), N-metyldiethanolamine (PET/NMDA) and N,N,N",N"-tetra(2-hydroxyethyI) ethylene diamine (PET/EtEDA) have been investigated. Epoxy resins used were Epidian 6 and Epidian 2; as fillers were applied modified silicas, products of Quarzwerke. To the composite adhesives the fillers were introduced in amounts of 5, 25, 50 or 65 parts per 100 weight parts of epoxy resin. The hardeners were applied in different weight ratios since 10 to almost 30 g per 100 g of the resin. The process of crosslinking was followed up and the shear strength of these epoxy compositions investigated at room temperature, 40 and 70°C.