scholarly journals Fatigue strength evaluation of PPGF35 by energy approach during mechanical tests

2021 ◽  
Vol 16 (59) ◽  
pp. 537-548
Author(s):  
Giacomo Risitano
Keyword(s):  
Composite Materials ◽  
Fatigue Strength ◽  
Glass Fibre ◽  
Mechanical Tests ◽  
Energy Approach ◽  
Polypropylene Composite ◽  
Strength Evaluation ◽  
Glass Fibre Reinforced

Thanks to the progress of research on thermoplastic materials, the properties of composite materials have improved considerably. The aim of this study is the evaluation of fatigue strength of glass-fibre-reinforced polypropylene composite (PPGF35) by applying both the Risitano Thermographic Method (RTM) and the new Static Thermographic Method (STM).

scholarly journals Analysis of fatigue and damage in glass-fibre-reinforced polypropylene composite materials

1999 ◽  
Vol 59 (10) ◽  
pp. 1461-1467 ◽  
Author(s):  
J.A.M Ferreira ◽  
J.D.M Costa ◽  
P.N.B Reis ◽  
M.O.W Richardson
Keyword(s):  
Composite Materials ◽  
Glass Fibre ◽  
Polypropylene Composite ◽  
Glass Fibre Reinforced

Monitoring of Internal Damage of Glass Fibre Reinforced Composite Components Using Strain Measurements with Strain Gauges and Fibre Optic Sensors

2013 ◽  
Vol 486 ◽  
pp. 58-61 ◽  
Author(s):  
Ivo Černý
Keyword(s):  
Fatigue Strength ◽  
Glass Fibre ◽  
Shear Failure ◽  
Dynamic Stiffness ◽  
Strain Gauges ◽  
Shear Stresses ◽  
Fibre Optic ◽  
Internal Damage ◽  
Manufacture Process ◽  
Glass Fibre Reinforced

Glass fibre reinforced polymer (GRP) composites are perspective materials for manufacture of components in different machinery applications. Favourable characteristics of these materials include very high specific strength, ratio of static and dynamic stiffness, particularly beneficial in dynamically loaded structures, and potentially excellent fatigue strength provided that there are no latent internal imperfections, occurring usually in the manufacture process. Defects like insufficient wet-out of glass fibres by resin result in significant reduction of static and fatigue strength in shear. If the component thickness is high and it is loaded by bending, considerable shear stresses occur in the neutral plane, which can cause premature shear failure of the component. Results of static and fatigue tests in bending of full-scale models of longitudinal frames of railway freight vehicle bogies, manufactured from GRP polyester composites, are shown and analysed in the paper. Surface strains measured using strain gauges were monitored during the component loading, its continuous damage and were analysed. The results are in a good agreement with the subsurface strains evaluated using fibre optic sensors embedded in the component during the manufacture process. Asymmetry of strains, both internal and surface, was connected with internal defects and consequently reduced strength. On the contrary, very good fatigue resistance was characteristic for components, where strain values were symmetrical.

Effect of water absorption on the mechanical properties of cross-ply hybrid pseudo- stem banana/glass fibre reinforced polypropylene composite

2019 ◽  
Vol 6 (9) ◽  
pp. 095326 ◽  
Author(s):  
Norizzati Zulkafli ◽  
Sivakumar Dhar Malingam ◽  
Siti Hajar Sheikh Md Fadzullah ◽  
Zaleha Mustafa ◽  
Kamarul Ariffin Zakaria ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Water Absorption ◽  
Glass Fibre ◽  
Polypropylene Composite ◽  
Effect Of Water ◽  
Glass Fibre Reinforced

scholarly journals Strength Characteristics of Concrete Specimen Wrapped with Glass Fiber Reinforced Polymer

2020 ◽  
Vol 8 (5) ◽  
pp. 358-362
Keyword(s):  
Mechanical Properties ◽  
Composite Materials ◽  
Glass Fibre ◽  
Fiber Reinforced Polymer ◽  
Glass Fiber Reinforced Polymer ◽  
Reinforced Polymer ◽  
Glass Fiber Reinforced ◽  
Glass Fibre Reinforced Polymer ◽  
Fibre Reinforced Polymer ◽  
Glass Fibre Reinforced

Glass Fiber Reinforced Polymer (GFRP) is one of a relatively new class of composite material. These materials are manufactured from a combination of fibers and resins. These composite materials have proven to be efficient and economical for the development of new structures and the repair of deteriorating structures in civil engineering. One of the important reasons for the use of GFRP composite materials is because of its superior mechanical properties. These mechanical properties includes impact resistance, strength, stiffness, flexibility and also its enhanced ability to carry loads. In construction industry, in order to meet the advanced infrastructure requirements, new innovative technologies and materials are being introduced. Also any new technology or material has its own limitations but to meet the new requirements, new technologies and materials have to be invented and put to use. With structures becoming old and increasing bar corrosion, old buildings have to be retrofitted with additional materials to increase their durability and life. For strengthening and retrofitting of concrete structures confinement with FRP has various applications. In this project concrete specimens are wrapped with glass fibre reinforced polymers to study the effect of confinement in the strength of specimens. For wrapping bi-directional and uni-directional glass fibre reinforced polymer mats are used. During the uni-directional glass fibre reinforced polymer wrapping, it is wrapped in both horizontal and vertical directions. The fiber used in this paper is bi-directional fibre. To find the effect of wrapping, specimens are wrapped in one rotation and two rotations.

Influence of Fibre Heating in PMC Production Technology

2006 ◽  
Author(s):  
A. Gisario ◽  
F. Quadrini ◽  
V. Tagliaferri
Keyword(s):  
Storage Modulus ◽  
Production Technology ◽  
Glass Fibre ◽  
Parallel Plate ◽  
Room Temperature ◽  
Mechanical Tests ◽  
Fibre Content ◽  
Heating Effect ◽  
Composite Fabrication ◽  
Glass Fibre Reinforced

Fibre heating can be employed to optimise composite fabrication in hand lamination. In order to show the fibre heating effect on the properties of hand laminated composites, dynamical and mechanical tests were performed on simply cured glass fibre reinforced laminates and on treated ones. In this second case the fibre content was heated before composite lamination by means of a hot parallel plate press. All the specimens were room temperature cured. A significant increase in storage modulus was observed as an effect of fibre heating as well as a data dispersion reduction. Additionally a lower thickness was measured due to the higher resin fluidity.

Sign in / Sign up

Export Citation Format

Share Document