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RISS 인기검색어
- 검색키워드
- 저자 : Murat Yavuz Solmaz (검색결과 2 건)
- 무료
- 기관 내 무료
- 유료
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Investigation of low velocity impact behaviors of honeycomb sandwich composites
Tolga Topkaya,Murat Yavuz Solmaz 대한기계학회 2018 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.32 No.7
Honeycomb sandwich composites are used as significant structural members in advanced engineering applications. Thus, it is critical to determine how they behave under impact loading, in addition to other loads. In this study, low velocity impact loading behaviors of honeycomb sandwich composites were experimentally investigated. Almost all of the design parameters of honeycomb sandwich composites were investigated. The results indicated that the core thickness of honeycomb had no effect on the strength of the composite, and the parameter influencing the impact behavior of the specimen the most was the face sheet thickness. When the face sheet thickness of the specimen was increased, the most apparent strength increase was observed in the models using carbon fiber-reinforced composite face sheets. For all face sheet types subject to impact energy of 10 Joules, the upper face sheets of 0.5 mm-thick specimens were perforated.
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An experimental investigation of the effects of chronic stress on bone-to-implant contact
Serkan Dundar,Alihan Bozoglan,Ferhan Yaman,Mustafa Kirtay,Ozgur Bulmus,Hacer Sahin Aydinyurt,Murat Yavuz Solmaz,Cenk Yanen 대한구강악안면외과학회 2019 대한구강악안면외과학회지 Vol.45 No.2
Objectives: This study aimed to investigate the effects of chronic restraint stress on the osseointegration of titanium implants. Materials and Methods: Twenty adult male Wistar albino rats were used in the study. After surgical insertion of titanium implants into the metaphyseal part of the tibial bone, rats were randomly divided into two groups: a control group (CNT group) and an experimental restraint stress group (RS group). In the CNT group, titanium implants were inserted surgically, and rats received no further treatment during the 47-day experimental period. In the RS group, restraint stress was applied for 3 hours per day for 45 days, beginning 2 days after implant surgery. Weight of the rats was measured prior to surgery and at the end of the study to analyze the effects of stress. At the end of the experimental period, rats were euthanized, and implants and surrounding bone tissues were used for undecalcified histological analysis. Serum cortisol levels were assessed in cardiac blood samples from the rats following centrifugation. Results: Average weight of rats in the RS group was lower than that of rats in the CNT group after the experimental protocol had been completed (P<0.05). Further, serum cortisol levels were higher in the RS group than in the CNT group (P<0.05). There were no significant differences in boneimplant connection levels between the two groups (P>0.05). Conclusion: The data analyzed in this study suggest that chronic restraint stress did not adversely affect rats during a 45-day osseointegration period.
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