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RISS 인기검색어
- 검색키워드
- 저자 : Mamoru Mizuno (검색결과 3 건)
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Masahiro Hosoi,Mamoru Mizuno,Jian Shi 대한기계학회 2017 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.31 No.9
In the present paper, damage development within Carbon fiber reinforced plastic (CFRP) laminates and CFRP/Aluminum (Al) honeycomb core sandwich panels by impact loading was evaluated, and change in material properties due to the damage development was investigated. Falling weight impact tests, 3-point bending tests and cross-sectional observation were carried out. As results, it is found that falling rate of bending elastic modulus due to internal damage in the laminate only is lower than that in the upper face-sheet of the sandwich panel, and that difference in the falling rate between them becomes maximum at the impact energy of 5.1 J. As a result of investigating the relationship between reduction in bending elastic modulus and internal damage development, the reduction is caused by delamination within CFRP laminates mainly. Since total length of cracks in CFRP/Al honeycomb core sandwich panels is smaller than that in the laminates only, the sandwich panels have high impact tolerance because of absorption of impact energy by damaging Al honeycomb core.
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Interfacial performance enhancement of carbon fiber/epoxy composites by a twostep surface treatment
Jian Shi,Yuji Yamamoto,Mamoru Mizuno,Chunhong Zhu 대한기계학회 2021 JOURNAL OF MECHANICAL SCIENCE AND TECHNOLOGY Vol.35 No.1
Carbon fiber-reinforced polymer composites (CFRPs) have many features, such as lightweight, high specific strength, and excellent chemical resistance. However, the adhesion at the interface of the CFRPs, which are composed of fiber and resin, is poor. Thus, delamination and interfacial peeling occur, and the mechanical properties, such as intrinsic strength and rigidity, decrease. Fiber surface modification by plasma and silane coupling treatments has attracted much attention to improve these properties. In this study, argon and oxygen mixed gas plasma treatment was used as pretreatment to introduce hydroxyl group on the fiber surface. This method was utilized to improve the adhesion between the fiber and resin. A silane coupling treatment was conducted to bond the carbon fiber and epoxy resin by chemical covalent bonding. The effect of silane coupling treatment on the interfacial property of CFRPs was investigated. Elemental analysis of the surface modified carbon fiber was explored through energy dispersive X-ray spectrometry. The functional groups of different carbon fiber surfaces were analyzed through X-ray photoelectron spectroscopy. The wettability of the treated carbon fiber was examined with a contact angle meter. The interlaminar shear strength was determined with a short beam method.
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GlycoNAVI : An Information Search System
Issaku Yamada,Hideyuki Honjo,Yuriko Hirose,Masako Mori,Mamoru Mizuno 한국당과학회 2012 한국당과학회 학술대회 Vol.2012 No.1
GlycoNAVI is a computer software suite containing databases, desktop applications, web services and other useful tools that has been developed to provide a comprehensive support for carbohydrate research. GlycoNAVI database, one of the components, consists of multiple databases relevant to glyco -organic chemistry such as organic synthesis methods (reactions), abbreviations (synonyms), molecular information and so on. All information in the database is gathered from numerous literatures related to carbohydrates. The functions in the database provide a number of search options for researchers to quickly access the desired information. The web retrieval system, for instance, allows researchers to input ID number or Keyword as a search query. The system also has the function to show the graphical images of chemical structure so that an easy access to the desired molecular information is possible. On the other hand, a molecular structure is often used as a search query in a conventional database of compounds. However; in this system, a researcher is able to use CSEditor, a desktop application with user-friendly graphical interface, to perform a search for chemical structure. CSEditor allows researchers to easily depict a chemical structure and the depicted structure can be used as a query for partial or exact matching search. Furthermore, by selecting the molecule in the search result, the details regarding chemical reactions including the molecule on the query are easily obtained. GlycoNAVI database is an inclusive set of information which opens the door to all carbohydrate researchers including the ones that are unfamiliar with chemical structures because CSEditor, an easy editing tool of carbohydrates, is available and always comes along the suite.
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