1. Next Generation Design Guidelines for Composites in Construction http://www.tu1207.eu Task Group 9.3 The International Federation for Structural Concrete http://www.fibtg93.ugent.be Marie Curie Initial Training Network European Network for Durable Reinforcement and Rehabilitation Solutions http://www.endure-itn.eu Action TU1207 PRODUCTION OF FILAMENT WOUND COMPOSITE TUBES FOR CONSTRUCTION V. Srebrenkoska 1, S. Risteska 2, S. Srebrenkoska 3 1 Faculty of Technology, University Goce Delchev – Shtip, R.Macedonia 2 Institute for Advanced Composites and Robotics, Prilep, R.Macedonia 3 Faculty of Technology and Metallurgy, Ss.Cyril & Methodius University, Skopje, R.Macedonia Filament Winding Technique Schematic representation of the process Presentation of coupled helical winding of layers Presentation of hoop winding of layers Materials Epoxy matrix system from Huntsman: Araldite LY1135-1 is an epoxy resin Aradur 917 is an anhydride hardener Accelerator 960 is an amine accelerator E-glass, continuous filament from Owens Corning – P185 1200 tex Ring Test SpecimensTensile Test Specimen Full factorial experimental design - 2 3 No. exp. Matrix of full factorial experimental design Characteristics (conditions of the experiment) X1X1 X2X2 X3X3 X1X2X1X2 X1X3X1X3 X2X3X2X3 X1X2X3X1X2X3 X 1 (m/min) velocity of the filament winding X 2 (N) fibre tension X 3 ( 0 ) winding angle 1 +1 5,256410 2+1 +1 216410 3+1 +1+1 5,2511010 4+1 +1 2111010 5 +1 +1 5,256490 6+1+1+1 216490 7+1 +1 5,2511090 8+1 2111090 Primary levelX 1 = 13,125X 2 = 87X 3 = 50 Interval of variation7,8752340 Lower level5,256410 Upper level2111090 Apstract The aim of this study is to investigate the mechanical properties of continuous fiber reinforced composite tubes, produced by filament winding technique. For this purpose, the full factorial experimental design was implemented. When designing filament winding composites three major factors are the most important: fiber orientation, fiber tension and velocity of the filament winding. The ultimate target is to achieve the composite pipes with good characteristics as bearing material for construction with the lowest possible weight. The filament winding composite pipes were made of glass fiber and epoxy resin. Glass fibers have good mechanical and thermal properties, and due to this reason, they are usually selected as the reinforcement material for filament winding technique. Thermoset or thermoplastic resin systems are usually used for impregnation of the continuous fibers in filament winding. Most commonly, epoxy resins are used due to their wide range of thermal and mechanical properties. The preparation of the composites was done by applying the 2 3 full factorial experimental design. For the purposes of these investigation, eight test specimen configurations are made and on the basis that, test results should provide material properties useful in the design stage. The velocity of the filament winding was taken to be the first factor, the second – fibre tension and the third – winding angle. The first factor low and high levels were chosen to be 5,25 m/min and 21 m/min, respectively, for the second factor – 64 N and 110 N, respectively and for the third factor – 10 0 and 90 0, respectively. The effect of a filament-winding processing variables on longitudinal and hoop tensile and bending properties of the prepared composites will be investigated according to American Society for Testing and Materials (ASTM) standards. split-disk test  Curing at 80°C, for four hours.  Curing at 140°C, for four hours.