نتایج جستجو برای: Glass Fiber

تعداد نتایج: 196871  

Journal: :علوم و تکنولوژی پلیمر 0
مجتبی صدیقی سهیل داریوشی

during the last decades a new class of materials named fiber/metal laminates (fmls) was introduced. it is a hybrid composite consisting of alternating thin layers of metal sheets and fiber-reinforced composite material. fmls have both low weight and good mechanical properties. in this study, the impact behavior of this attractive material is investigated. the effect of fiber angle, stacking seq...

Journal: :journal of mechanical research and application 2011
reza eslami farsani seyed mohammad reza khalili vahid daghighi reza fazaeli

the creep behavior of basalt fiber reinforced epoxy (bfre) and glass fiber reinforced epoxy (gfre) composites was studied through tensile testing at high temperature. to study the effect of reinforcing epoxy, the micro glass powder (mgp) was added at various volume percentage into the epoxy resin in bfre composites. the initial strain for all the specimens were evaluated and compared with each ...

Journal: :dental research journal 0
farahnaz sharafeddin ali asghar alavi samira zare

background: glass and quartz fiber posts are used in restoration of structurally compromised roots. accessory fiber posts are recently introduced to enhance the fiber post adaptation. this study evaluated the effectiveness of glass versus quartz accessory fiber posts. materials and methods: in this experimental study, 40 mandibular premolar roots with similar dimension (radius of 3.5 ± 0.2 mm a...

Journal: :civil engineering infrastructures journal 0
hasan taherkhani assistant professor, civil engineering department, university of zanjan, zanjan, iran

the performance of asphaltic pavements during their service life is highly dependent on the mechanical properties of the asphaltic layers. therefore, in order to extend their service life, scientists and engineers are constantly trying to improve the mechanical properties of the asphaltic mixtures. one common method of improving the performance of asphaltic mixtures is using different types of ...

Journal: :journal of dentistry, tehran university of medical sciences 0
m. vojdani aar. khaledi

statement of problem: fracture strength of a denture base resin is of great concern, and many approaches have been used to strengthen acrylic resin dentures. purpose: the aim of this study was to measure the transverse strength of a heat polymerized acrylic resin, after reinforcement with metal wire and two types of glass fibers. materials and methods: forty rectangular specimens (65.0×10.0×3.3...

Journal: :علوم و تکنولوژی پلیمر 0
مجتبی صدیقی مهدی تاجداری سهیل داریوشی

the idea of combining low weight and good mechanical properties has led to efforts to develop a new light fiber/metal laminate (fml) in the last decade. fmls are hybrid composites consisting of alternating thin layers of metal sheets and fiber-reinforced epoxy prepregs. in this study, the effect of fiber orientation on tensile properties of this material is investigated both analytically and ex...

Journal: :مجله دانشکده دندانپزشکی اصفهان 0
مینا بهرامی آبادی احمد منشی mina bahrami abadi ahmad monshi

introduction: glass-ionomer cements (gics) are one of the most important dental restorative biomaterials. the aim of this study was to synthesize glass-ionomer‒silk fiber composite and evaluate the effect of adding natural degummed silk fiber on the bioactivity and the ability to release fluoride by glass-ionomer cement. materials and methods: in this study, commercial fuji ii glass-ionomer cem...

ژورنال: :journal of dental school, shahid beheshti university of medical sciences 0
امیر قاسمی amir ghasemi dental school, shaheed beheshti university of medical sciences,tehran–iran ([email protected] )دانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی نازلی صدرزاده nazli sadrzadeh مجید برگ ریزان majid bargrizan dental school, shaheed beheshti university of medical sciences,tehran–iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی لیلا نصیری خانلر leila nasiri khanlar dental school, shaheed beheshti university of medical sciences,tehran–iranدانشکده دندانپزشکی، دانشگاه علوم پزشکی شهید بهشتی حمید فرهادی hamid farhadi

سابقه و هدف: کامپوزیت رزین ها در اتصال چند دندان به هم، شکننده می باشند. بنابراین، تحقیقات زیادی به منظور تقویت خصوصیات فیزیکی و دوام این مواد صورت گرفته که از جمله آنها می توان فایبرها را نام برد. این تحقیق با هدف بررسی اثرglass –fiber بر استحکام خمشی کامپوزیت رزین صورت گرفت.مواد و روش ها: تحقیق به صورت تجربی وin vitro بر روی 22 نمونه ( هر گروه 11 نمونه) به ابعاد mm 25×6×2 انجام شد. در گروه او...

2012
Chang-Hsuan Chiu

This paper demonstrates the feasibility of replacing the metal coil spring with the composite coil spring. Three different types of springs were made using glass fiber, carbon fiber and combination of glass fiber and carbon fiber. The objective of the study is to reduce the weight of the spring. According to the experimental results the spring rate of the carbon fiber spring is 34% more than th...

Reza Eslami Farsani Reza Fazaeli Seyed Mohammad Reza Khalili Vahid Daghighi

The creep behavior of basalt fiber reinforced epoxy (BFRE) and glass fiber reinforced epoxy (GFRE) composites was studied through tensile testing at high temperature. To study the effect of reinforcing epoxy, the micro glass powder (MGP) was added at various volume percentage into the epoxy resin in BFRE composites. The initial strain for all the specimens were evaluated and compared with each ...

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