Behavior of concrete columns confined by carbon composite tubes

2004 ◽  
Vol 31 (2) ◽  
pp. 178-188 ◽  
Author(s):  
Won-Kee Hong ◽  
Hee-Cheul Kim
Keyword(s):  
Large Scale ◽  
Glass Fibers ◽  
Testing Machine ◽  
Concrete Columns ◽  
Longitudinal Axis ◽  
Carbon Composite ◽  
Filament Winding ◽  
Axial Loads ◽  
Composite Tubes ◽  
Filament Wound

The carbon composite tube can play an important role in replacing or complementing longitudinal and transverse reinforcing steels by providing ductility and strength for conventional columns. In this study, both experimental and analytical investigations of axial behavior of large-scale circular and square concrete columns confined by carbon composite tubes are presented. The specimens are filament-wound carbon composite with 90° + 90°, 90° ± 60°, 90° ± 45°, and 90° ± 30° winding angles with respect to a longitudinal axis of a tube. The instrumented large-scale concrete-filled composite tubes are subjected to monotonic axial loads exerted by a 10 000 kN universal testing machine (UTM). The influence of transverse dilation, winding angle, thickness of a tube, as well as shape of the column section on stress–strain relationships of the confined columns is identified and discussed. Proposed equations to predict both strength and ductility of confined columns by carbon composite tubes demonstrate good correlation with test data obtained from large-scale specimens.Key words: carbon composites, glass fibers, strength, filament winding.

Lateral behavior of full-scale concrete-filled carbon composite columns

2004 ◽  
Vol 31 (2) ◽  
pp. 189-203 ◽  
Author(s):  
Won-Kee Hong ◽  
Hee-Cheul Kim ◽  
Suk-Han Yoon
Keyword(s):  
Concrete Strength ◽  
Concrete Columns ◽  
Carbon Composite ◽  
Full Scale ◽  
Filament Winding ◽  
Stress Strain ◽  
Composite Tubes ◽  
Moment Capacity ◽  
Composite Columns ◽  
Lateral Behavior

Full scale concrete-filled carbon composite columns without longitudinal and transverse reinforcing steels are tested to investigate the lateral behavior of columns confined with carbon composite tubes. In the present study, the full-scale circular and square concrete-filled carbon composite tubes (CFCTs) with various winding angles with respect to longitudinal axes of the tubes are subjected to lateral loads under a constant axial load. The influence of thickness and winding angle of carbon tubes on the lateral behavior of concrete columns is studied both experimentally and analytically, demonstrating that the calculated ultimate moment capacity of confined columns compares well with test data. For this analytical process, stress–strain relationships of confined concrete columns uncovered by the authors are used to identify the distribution of confined compressive concrete strength at failure. This stress–strain model considers the influence of winding orientation of carbon fibers on the confining capability of the concrete core.Key words: carbon composite, lateral capacity of confined column, strength, filament winding.

scholarly journals Mechanical Properties of Filament Wound Pipes: Effects of Winding Angles

2015 ◽  
Vol 11 (1-2) ◽  
Author(s):  
Simona Naseva ◽  
Vineta Srebrenkoska ◽  
Svetlana Risteska ◽  
Maja Stefanovska ◽  
Sara Srebrenkoska
Keyword(s):  
Mechanical Properties ◽  
Tensile Properties ◽  
Glass Fibers ◽  
Sem Analysis ◽  
Filament Winding ◽  
High Fiber ◽  
Glass Fiber Reinforced ◽  
Filament Wound ◽  
Mechanical Performances ◽  
Winding Angle

The aim of this study is to investigate the mechanical properties of continuous glass fiber reinforced composite tubes produced by filament winding technique with three different winding angles. With help of split-disk tests hoop tensile properties of selected specimens were determined, where reliable results were obtained with low standard deviations. It was observed that bigger winding angle lead to higher hoop tensile properties of filament wound tubular samples. Also, the effect of reinforcement direction on the mechanical performances of these composites has been presented. Fiber fracture and fiber-matrix debonding is observed to be the dominant failure mechanisms by samples winded with bigger winding angles, whereas delamination in addition to these mechanisms is detected by samples with smaller winding angles. From received results it is concluded that, mechanical properties of composite specimens are depended from winding angles in filament winding technology.With help of conducted SEM analysis good merger between glass fibers and the epoxy matrix was seen, but cracks within plies and broken fiber were noticed, due to the high fiber branching.

Using potential of filament-wound carbon/glass polymeric composites as rocket motor thermal insulation

2021 ◽  
Vol 29 (9_suppl) ◽  
pp. S1541-S1554
Author(s):  
Jelena Rusmirović ◽  
Jela Galović ◽  
Marija Kluz ◽  
Srdja Perković ◽  
Saša Brzić ◽  
...  
Keyword(s):  
Thermal Insulation ◽  
Glass Fibers ◽  
Polymeric Composites ◽  
Peak Height ◽  
Mechanical Analysis ◽  
Rocket Motor ◽  
Filament Winding ◽  
Woven Fabric ◽  
Filament Wound ◽  
Interlaminar Shear

The study aim is to develop hybrid filament-wound polymeric composites based on flame retardant polyester resin (UPe) and multi-layer structured glass or combined carbon and glass fibers for use as ablative thermal insulation of rocket motor by wet filament winding technique. The composites have a multi-layered structure consisting of two layers of carbon (CF) or glass woven fabric (GF) and one layer of carbon or glass direct roving (CR or GR, respectively), repeated in three cycles. Structural analysis, performed using FTIR spectroscopy and dynamical-mechanical analysis, confirm highly polymerized network. Lower values of the tanδ peak height indicate improved interfacial adhesion between carbon/glass fibers and UPe. The improvements of thermal insulation index of 37% and erosion rate of 38.6% at 180°C are achieved for combined carbon/glass fiber–based composite compared to the neat UPe. Tensile and interlaminar shear properties are investigated according to the fiber orientation and the highest values of tensile and interlaminar shear strengths are obtained for composites with longitudinal orientation, 417.48 MPa and 22.30 MPa, respectively. Compared to the neat UPe, which degrades after 50 s at 3000°C, the composites are stable up to 192 s.

Experimental and Numerical Investigation on the Torsional Behaviour of Filament Winding-Manufactured Composite Tubes

2016 ◽  
Vol 834 ◽  
pp. 173-178 ◽  
Author(s):  
Gabriel Mansour ◽  
Kostas Tzikas ◽  
Dimitrios Tzetzis ◽  
Apostolos Korlos ◽  
Dimitrios Sagris ◽  
...  
Keyword(s):  
Torsion Test ◽  
Numerical Approach ◽  
Carbon Composite ◽  
Filament Winding ◽  
Torsional Loading ◽  
Theoretical Relation ◽  
Composite Tubes ◽  
Element Analysis ◽  
Test Speed ◽  
Twisting Angle

The present work is focused in the examination of the torsional behaviour of composite tubes by a combined experimental and numerical approach. Glass and carbon composite tubes were manufactured by the filament winding technique. All the tubes were fabricated with glass and carbon Fiber orientation at ±45°. The effect of the torsional loading on the mechanical strength of the glass and carbon composite tubes was initially studied experimentally. Angular velocity of 5° per min was used as torsion test speed while torque-twisting angle changes were recorded. The torsional behaviour of composite tubes was also simulated using Finite Element Analysis (FEA). An elastic orthotropic composite model was used for the simulations. The normal and shear stress contours were obtained from the FE models, while the theoretical relation of the torque versus the twisting angle was calculated. Comparison of the numerical and experimentally obtained results has shown a relatively similar torsional behaviour.

scholarly journals Research of Dependence of the Damage Area on Tow Width on Filament-Wound Composite Tubes

2017 ◽  
Vol 2017 (1) ◽  
pp. 7-14
Author(s):  
Marcelina Bobrowska ◽  
Michał Barcikowski ◽  
Radosław Rybczyński
Keyword(s):  
High Velocity ◽  
Composite Structures ◽  
Layered Composite ◽  
Filament Winding ◽  
Composite Tubes ◽  
Damage Area ◽  
Gas Gun ◽  
Filament Wound ◽  
Filament Wound Composite ◽  
Wound Composite

Abstract This paper explores the effect of tow width on the damage area produced by high velocity impacts on glass fiber/epoxy composite structures made by filament winding. The subject of the research were a four-layered composite tubes that have been designed using matrix method. The method was used to select mosaic patterns with different rest of the winding stroke and number of interlaces, which are places of stress concentration and which affect the strength of the composite. The narrowest (5 mm) and the widest (17 mm) tow width available was chosen. Composite filament-wound structures were subjected to a high velocity impact by a 2.0 g spherical hardened steel impactor propelled to a velocity of 140 ÷ 170 m/s using a gas gun. It was observed that dependence of the damage area on tow width on filament-wound composite tubes is possible.

Effect of drop weight impact on the torsional-loading behavior of filament wound and prepreg-wrapped composite tubes

2020 ◽  
pp. 096739112093010
Author(s):  
Ibrahim Fadil Soykok ◽  
Hamza Tas ◽  
Okan Ozdemir ◽  
Halis Kandas
Keyword(s):  
Twist Angle ◽  
Filament Winding ◽  
Torsional Loading ◽  
Composite Tubes ◽  
Front View ◽  
Impact Performance ◽  
Deformation Curves ◽  
Filament Wound ◽  
Winding Angle ◽  
Wrapping Technique

This article presents an experimental study on the torsional behavior of composite tubes subjected to impact loadings. Four types of composite tubes with the winding angle of 30°, 45°, 60°, and 75° ([±30]FW, [±45]FW, [±60]FW, and [±75]FW) were produced with the filament winding method. Besides, a [0,90]PP composite tube was manufactured with the prepreg wrapping technique. After the composite tubes were impacted at 2.5 J, 5.0 J, and 7.5 J, non-impacted and impacted composite tubes were tested under torsional loading. Contact force–deformation curves of impacted tubes are presented. Torsional moment–twist angle relations for both impacted and non-impacted composite tubes were obtained. In addition, front view and side view of the impacted zone of composite tubes are given. The results showed that sample [±60]FW had the best impact performance with regard to absorbed energy. The impacted samples of [±60]FW and [±75]FW had the lowest torsional strength for each energy level.

scholarly journals Bicycle frame from hemp fibre filament wound composites

2020 ◽  
Vol 3 (1) ◽  
Author(s):  
Arisara Chaikittiratana ◽  
Sacharuck Pornpeerakeat ◽  
Kerati Suwanpakpraek ◽  
Sitthichai Limrungruengrat ◽  
Joshua Dietz-Röthlingshöfer
Keyword(s):  
Finite Element ◽  
Static Load ◽  
Epoxy Composite ◽  
Filament Winding ◽  
Epoxy Composites ◽  
Composite Tubes ◽  
Element Analysis ◽  
Hemp Fibre ◽  
Filament Wound ◽  
Bicycle Frame

This work presents an initial study for hemp fibre produced in Thailand. The study focuses on the application of the filament winding technique in the production of hemp-epoxy composite tubes for a bicycle frame. The motivation is to produce hemp fibre composites from locally available resources in Thailand. For the initial trail, existing bicycle steel tubes were replaced by ±45° filament wound hemp-epoxy composites with thin aluminium inner layers. The mechanical properties of the hemp-epoxy composites were studied according to the ASTM standard. Two static load cases were chosen and considered for a 100 kg cyclist sitting on the saddle and pedalling while standing. The internal forces and moments were calculated for the frame and frame tubes. The stress and buckling analyses were performed using the finite element method for frame tubes considering the above loading cases. The finite element analysis shows that hemp-epoxy composite tubes with ±45° fibre orientation can be used as bicycle frame tubes and meet the design specifications under the considered static load conditions. The filament winding process was accomplished successfully at KMUTNB using an automated desktop filament winding machine.

Low velocity impact response and damages of GFRP composite tubes under room and cryogenic temperatures

2021 ◽  
pp. 002199832110293
Author(s):  
Memduh Kara ◽  
Mustafa Arat ◽  
Mesut Uyaner
Keyword(s):  
Room Temperature ◽  
Filament Winding ◽  
Low Velocity Impact ◽  
Low Velocity ◽  
Composite Tubes ◽  
Velocity Impact ◽  
Glass Fiber Reinforced Plastic ◽  
Glass Fiber Reinforced ◽  
Gfrp Composite ◽  
Force Time

In this paper, we have investigated the damages of glass fiber reinforced plastic (GFRP) composite tubes under the effect of low-velocity impact (LVI) at cryogenic environment conditions and room temperature. A GFRP composite tube consists of 6 layered E-glass/epoxy samples with a ± 55° winding angle, which produced by the filament winding method. Composite tubes either at room temperature or conditioned by liquid nitrogen at different temperature values (273 K, 223 K, 173 K, and 77 K) were impacted at 5, 7.5, and 10 J. Also, force-time and force-displacement graphs were plotted. The damaged regions of the samples were scrutinized. The damage areas of the GFRP composite tubes were smaller as the temperature decreased. However, the energy absorbed at low-temperature conditions was slightly higher than that absorbed in room temperature. Besides, no micro-cracks developed in the composite tubes after cryogenic conditioning.

Sign in / Sign up

Export Citation Format

Share Document