Thermographic Testing of Epoxy-Glass Composite Tensile Properties

Kutin, Marina; Ristić, Slаvicа; Puharić, M.; Vilotijević, Miroljub; Krmar, M.

doi:10.5767/anurs.cmat.110201.en.088k

Cited by 9 publications

(9 citation statements)

References 3 publications

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“…The temperature distribution for both specimens consist of two phases, as illustrate in Figure 6. Each phase of temperature distribution has different behaviour [17,28,29,30]. The first phase of the elastic phase generates a decreasing trend of temperature behaviour due to the absorption energy by the specimen from the given load.…”

Section: Resultsmentioning

confidence: 99%

“…where, α1 and α2 are the coefficients of thermal expansion (μm/m o C), Cp is the specific heat at constant pressure (J/g o C), ρ is density (g/cc) and Δσ is the change in stress (N/m 2 ) where subscripts 1 and 2 denote the longitudinal and transverse to fibre directions. Furthermore, most research works based on thermography on composite material has shown that thermal analyses can indicate the damage location on the specimen surface and successfully detected the damage formation and propagation based on the temperature evolution under static loading conditions [13,14,15,16,17,18,19].…”

Section: Introductionmentioning

confidence: 99%

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Damage Behaviour and Stress Concentration Factor of Open Hole Tensile (OHT) Glass Fibre Reinforced Polymer (GFRP) Composites

Bale

2019

IJAME

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In many applications of composites, open-hole frequently includes for various purposes. However, further study on open-hole behaviour is still required, including on its strength and damage properties by combining experimental testing, real-time observations and calculations based on theoretical analysis and simulation model. The objective of this study is to understand the effect of an open-hole glass fibre reinforced polymer (GFRP) composites on tensile (static) properties, damage behaviour through Non-destructive Testing (NDT) Thermography and stress concentration factor (SCF). This study used an open-hole rectangular of GFRP specimens that fabricated by filament winding (FW) method and resin transfer moulding (RTM) method. It is found that the RTM specimens generate ≈ 170 % higher of tensile strength and ≈ 100 % higher of tensile modulus compared to the FW specimens. Infra-red (IR) camera shown the good detection on damage behaviour based on temperature increase at elastic and failure phase. Moreover, theoretical analysis and simulation results shown the good correlation where SCF reaches more than 4 times at the edge of the hole. This study concludes that open-hole on GFRP composites affects the tensile properties and generates damage marked by temperature increase and high SCF at the edge of the hole.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Damage Behaviour and Stress Concentration Factor of Open Hole Tensile (OHT) Glass Fibre Reinforced Polymer (GFRP) Composites

Bale

2019

IJAME

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“…Studies were also performed to investigate the evolution of composite damage under static tensile tests by using the thermography method with different fibre orientations of E-glass respective to the loading direction. These studies showed that the thermography method can locate the failure due to the rupture of fibre by detecting the hottest point of the specimen and it is very useful for early diagnostics of structures under real conditions [38,39]. Colombo et.al [40] in their study about mechanical characteristics of GFRP by thermography, categorised thermal behaviour of fibre composite into elastic behaviour, non-elastic behaviour and final breakage.…”

Section: Introductionmentioning

confidence: 99%

Thermal phenomenon of glass fibre composite under tensile static and fatigue loading

et al. 2017

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The aim of this study is to understand the thermal phenomenon of unidirectional Glass Fibre Reinforced Polymer (GFRP) composite under static and fatigue (tensile) loads. This study used a rectangular shaped GFRP composite and consisted of specimens with and without a circular notch. Under static test, the constant displacement rate was applied. Under fatigue test, frequency and amplitude of stress were explored to study the fatigue properties and damage evolution of the specimen. Thermography was used in real-time observation to obtain the temperature profile on the external surface of the specimens. This experimental method showed that the thermal phenomenon gave a good detection of the damage appearance of GFRP material under static loading. Moreover, thermal phenomenon gave a good correlation with the energy dissipation under fatigue loading. Thermal phenomenon successfully determined the high cycle fatigue strength of GFRP composite. This study concluded that thermal phenomenon observed by Infra-Red (IR) camera has successfully demonstrated the damage propagation and the strength behaviour of GFRP composite due to tensile loading in both static and fatigue conditions. The IR camera can then be used to determine the damage evolution and the strength prediction based on the thermal phenomenon on the external surface of the GFRP composite.

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“…Such approach is common in the automotive industry. Other common applications of the active PVT scheme are in quantitative subsurface defect assessment (cracks, delaminations, impact damages, disbondings, moisture), thermophysical property evaluation; in all kind of industries (Myriounis et al, 2011;Lahiria et al, 2012;Naderi et al, 2012;Wu et al, 2011;Cheng and Tian, 2012;Kutin et al, 2011).…”

Section: Introductionmentioning

confidence: 99%

A New Approach to Damage Detection in Composite Body Structures Using Time Compensated Hyperspectral Image Analysis Technique

Iskandarani

2013

American Journal of Applied Sciences

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A novel approach to damage detection in composite car body structures using hyperspectral image index analysis algorithm is presented and discussed. The adapted technique allows the monitoring and analysis of a components structure based on correlation between time spaced thermal images. The technique produces several organized tables resulting from image fusion and frame deviation pixel redistribution calculations, which results in computable matrices. The obtained results proved the technique to be capable of classifying damage with ability to model various types of damage under various conditions. There is a need to accurately identify damaged composite components. This will enable the used algorithm to determine if the level of damage or defect in the component is critical according to established database that takes into account mechanical and physical factors. Testing different composite structures using Hyperspectral technique and Pulse Video Thermography (PVT), as hyperspectral uses different bands with different wavelengths to analyze the image results, which enables better recognition and classification. Successful recognition and component classification obtained with characterization of tested composite

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Thermographic Testing of Epoxy-Glass Composite Tensile Properties

Cited by 9 publications

References 3 publications

Damage Behaviour and Stress Concentration Factor of Open Hole Tensile (OHT) Glass Fibre Reinforced Polymer (GFRP) Composites

Damage Behaviour and Stress Concentration Factor of Open Hole Tensile (OHT) Glass Fibre Reinforced Polymer (GFRP) Composites

Thermal phenomenon of glass fibre composite under tensile static and fatigue loading

A New Approach to Damage Detection in Composite Body Structures Using Time Compensated Hyperspectral Image Analysis Technique

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