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RISS 인기검색어
- 검색키워드
- 저자 : Ulcay Y. (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Effects of Gamma Irradiation on Some Mechanical Properties of Novoloid Fibers
Ulcay, Y.,Altun, S. The Korean Fiber Society 2004 Fibers and polymers Vol.5 No.2
Novoloid fibers have high chemical, flame and thermal resistance; however they have low tensile properties. Effects of gamma irradiation on the tensile properties of novoloid fibers have been investigated. Loop and knot resistance have also been examined. Maximum tenacity of the single fiber increased with an increase of the radiation dose applied. According to the loop and knot tenacity results it is found that brittleness has been also affected by the amount of radiation dose.
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Effect of Dilation on the Mechanical Characterization of Vascular Prostheses
Ulcay Y.,Pourdeyhimi B. The Korean Fiber Society 2005 Fibers and polymers Vol.6 No.1
The purpose of this study has been to investigate the effect of dilation on the some mechanical properties of several types of warp-knitted vascular grafts. The structures of warp knit vascular grafts used in the experiments were reverse locknit, locknit, and Tricot. Various mechanical properties of these grafts were determined using devices developed for the purpose. Clinical data obtained were compared with experimental results of warp knit vascular grafts. The most important mechanical properties are found to be creep extension, bursting strengths, and compliance. Preliminary results indicate that vascular grafts are non-compliant and exhibit creep which is predictive of the long term dilation that has been noted in the clinical results. It is found that there is a positive correlation between experimental data and clinical results for at least the grafts tested.
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