Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles
https://orcid.org/0000-0002-3157-634X
Highlights The effects of UV, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles have been studied. Different cross-sections were used to study the effect of profile type. Effect of conditioning on different failure modes were investigated. Regression models have been developed to predict the mechanical properties retentions.
Abstract The present research examines the effects of UV radiation, moisture and elevated temperature on the mechanical properties of GFRP pultruded profiles. Flexural, compressive and tensile properties of different GFRP sections were studied after they were exposed for 1000, 1500, 2000 and 3000 h to UV radiation and water vapour condensation cycles. Mechanical tests, including three-point bending, compression and tension tests, SEM analyses, and statistical studies were conducted to gather comprehensive results. The results showed that the mechanical properties of various GFRP sections generally decreased with the duration of conditioning: however, the rate of the decrease that was only slight up to 1000 h, increased rapidly during 1000–2000 h, and again it was slow during 2000–3000 h. The maximum reductions were 34%, 28% and 23% after exposure to 3000 h cycles for bending, tensile and compression tests, respectively. In the bending tests, where inter-laminar shear failure controls ultimate strength, the degradation was greater compared to the situation where fibres fracture controls the failure. Further, regarding the cross-section parameter, it was concluded that the thickness and perimeter are the effective factors; the thinner the sample and the larger the perimeter, the greater is the reduction. However, the maximum effect of the cross section in terms of thickness and perimeter did not exceed 13% among all sections.
Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles
https://orcid.org/0000-0002-3157-634X
Highlights The effects of UV, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles have been studied. Different cross-sections were used to study the effect of profile type. Effect of conditioning on different failure modes were investigated. Regression models have been developed to predict the mechanical properties retentions.
Abstract The present research examines the effects of UV radiation, moisture and elevated temperature on the mechanical properties of GFRP pultruded profiles. Flexural, compressive and tensile properties of different GFRP sections were studied after they were exposed for 1000, 1500, 2000 and 3000 h to UV radiation and water vapour condensation cycles. Mechanical tests, including three-point bending, compression and tension tests, SEM analyses, and statistical studies were conducted to gather comprehensive results. The results showed that the mechanical properties of various GFRP sections generally decreased with the duration of conditioning: however, the rate of the decrease that was only slight up to 1000 h, increased rapidly during 1000–2000 h, and again it was slow during 2000–3000 h. The maximum reductions were 34%, 28% and 23% after exposure to 3000 h cycles for bending, tensile and compression tests, respectively. In the bending tests, where inter-laminar shear failure controls ultimate strength, the degradation was greater compared to the situation where fibres fracture controls the failure. Further, regarding the cross-section parameter, it was concluded that the thickness and perimeter are the effective factors; the thinner the sample and the larger the perimeter, the greater is the reduction. However, the maximum effect of the cross section in terms of thickness and perimeter did not exceed 13% among all sections.
Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles
https://orcid.org/0000-0002-3157-634X
Highlights The effects of UV, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles have been studied. Different cross-sections were used to study the effect of profile type. Effect of conditioning on different failure modes were investigated. Regression models have been developed to predict the mechanical properties retentions.
Abstract The present research examines the effects of UV radiation, moisture and elevated temperature on the mechanical properties of GFRP pultruded profiles. Flexural, compressive and tensile properties of different GFRP sections were studied after they were exposed for 1000, 1500, 2000 and 3000 h to UV radiation and water vapour condensation cycles. Mechanical tests, including three-point bending, compression and tension tests, SEM analyses, and statistical studies were conducted to gather comprehensive results. The results showed that the mechanical properties of various GFRP sections generally decreased with the duration of conditioning: however, the rate of the decrease that was only slight up to 1000 h, increased rapidly during 1000–2000 h, and again it was slow during 2000–3000 h. The maximum reductions were 34%, 28% and 23% after exposure to 3000 h cycles for bending, tensile and compression tests, respectively. In the bending tests, where inter-laminar shear failure controls ultimate strength, the degradation was greater compared to the situation where fibres fracture controls the failure. Further, regarding the cross-section parameter, it was concluded that the thickness and perimeter are the effective factors; the thinner the sample and the larger the perimeter, the greater is the reduction. However, the maximum effect of the cross section in terms of thickness and perimeter did not exceed 13% among all sections.
Effects of UV radiation, moisture and elevated temperature on mechanical properties of GFRP pultruded profiles
Bazli, Milad (Autor:in) / Jafari, Armin (Autor:in) / Ashrafi, Hamed (Autor:in) / Zhao, Xiao-Ling (Autor:in) / Bai, Yu (Autor:in) / Singh Raman, R.K. (Autor:in)
02.10.2019
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Effect of harsh environments on mechanical properties of GFRP pultruded profiles
| British Library Online Contents | 2016
Effect of harsh environments on mechanical properties of GFRP pultruded profiles
| British Library Online Contents | 2016
| British Library Online Contents | 2019