Next Generation Design Guidelines for Composites in Constructionhttp://www.tu1207.eu

Task Group 9.3The International Federationfor Structural Concretehttp://www.fibtg93.ugent.be

Marie Curie Initial Training NetworkEuropean Network for Durable Reinforcementand Rehabilitation Solutionshttp://www.endure-itn.eu

Action TU1207

PRODUCTION OF FILAMENT WOUND COMPOSITE TUBES FOR CONSTRUCTIONV. Srebrenkoska1, S. Risteska2, S. Srebrenkoska3

1Faculty of Technology, University Goce Delchev – Shtip, R.Macedonia2Institute for Advanced Composites and Robotics, Prilep, R.Macedonia

3Faculty 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 resinAradur 917 is an anhydride hardenerAccelerator 960 is an amine accelerator

E-glass, continuous filament from Owens Corning – P185 1200 tex

Ring Test Specimens Tensile Test Specimen

Full factorial experimental design - 23

No. exp.

Matrix of full factorial experimental design

Characteristics(conditions of the experiment)

X1 X2 X3 X1X2

X1X3

X2X3

X1X2X3

X1 (m/min)velocity of

the filament winding

X2 (N)fibre tension

X3 (0)winding angle

1 -1 -1 -1 +1 +1 +1 -1 5,25 64 102 +1 -1 -1 -1 -1 +1 +1 21 64 103 -1 +1 -1 -1 +1 -1 +1 5,25 110 104 +1 +1 -1 +1 -1 -1 -1 21 110 105 -1 -1 +1 +1 -1 -1 +1 5,25 64 906 +1 -1 +1 -1 +1 -1 -1 21 64 907 -1 +1 +1 -1 -1 +1 -1 5,25 110 908 +1 +1 +1 +1 +1 +1 +1 21 110 90

Primary level X1 = 13,125 X2 = 87 X3 = 50

Interval of variation 7,875 23 40 Lower level 5,25 64 10Upper level 21 110 90

ApstractThe 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 23 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 – 100 and 900, 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.