Mechanical and thermal characterization of the filament wound composites for construction

Srebrenkoska, Vineta (2015) Mechanical and thermal characterization of the filament wound composites for construction. University in Sheffield. (Unpublished)

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Properties of fiber reinforced composites (FRP) arise as a function of its constituent materials, their distribution, and the interaction among them and as a result of it an unusual combination of material properties can be obtained. There are various methods of their manufacturing, but filament winding is a very important and widely used technique for FRP production related to civil engineering. The basis of this technology includes winding of resin-impregnated fibers into a tool and hardening of the wound structure. This technology enables the fibers to be placed into the direction of the load that may be expected during exploitation of construction elements. By varying the winding angle with respect to the mandrel axis, directional strength can be obtained by the loads, which will operate on the finished product. It is essential to know the mechanical and thermal characteristics of filament wound tubes in order to employ them in design applications.
The focus of this stay was to investigate the mechanical and thermal properties of different glass fiber reinforced composite pipes produced by filament winding technique. So, the research program of the STSM was divided into two tasks. The first one refers to the mechanical characterization, and the second one to the thermal characterization of the epoxy resin and filament wound pipes.
Based on the investigation in the fame of this STSM, it can be concluded that from the mechanical point of view there are significant differences in the filament wound pipes with different fiber orientation. Regarding the tensile properties, the bigger winding angle lead to higher hoop tensile properties of filament-wound tubular samples. But, for the transverse compression properties of composite specimens the lower winding angle lead to higher transverse compression properties of the samples. The optimal mechanical properties have the samples on the primary level winded with angle 450. It was noticed a slight influence of the fiber tension but the velocity of the filament winding doesn’t influence on the mechanical properties of the specimens.
From the results of thermal characterization, it can be concluded that all filament wound pipes have a good thermal stability and their weight loss was observed at temperature interval from 600 oC to 1000 oC. Based on the measurements for the glass transition and rate of cure, it can be concluded that crosslinking reaction between the resin and fibers in the filament wound pipes is already reached in all composites.

Item Type: Other
Subjects: Engineering and Technology > Materials engineering
Divisions: Faculty of Technology
Depositing User: Vineta Srebrenkoska
Date Deposited: 01 Oct 2015 11:27
Last Modified: 01 Oct 2015 11:27

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