نتایج جستجو برای: e glass fiber

تعداد نتایج: 1204923  

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...

2017
Edith Mäder Stephen C. Bondy

Since the early 1930s, the process of melting glass and subsequently forming fibers, in particular discontinuous fiber glass or continuous glass filaments, evolved into commercial-scale manufacturing. Most commonly, a direct melt process is applied. Thereby, the several raw materials were mixed, fed into a furnace, melted and forwarded to the fiber-forming units. Here, the filaments are formed ...

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...

2004
T. Ely D. Armentrout

A series of stress corrosion experiments were performed on 12 pultruded glass fiber composite materials (two fibers in six different matrices) commonly used in high voltage composite insulators. In this study two types of glass fibers were investigated, namely Eglass and ECR-glass. The tests were performed in nitric acid solutions (pH 1.2) using constant K I specimens that were specifically des...

2013
Brahmananda Pramanik P. Raju Mantena

This paper presents an investigation on energy absorption characteristics of nano-reinforced panels, laminated face sheets and sandwich composites in high velocity ballistic and low velocity punch-shear experiments. The vinyl ester panels were reinforced with 1.25 and 2.5 wt. percent nanoclay and exfoliated graphite platelets. Three different face sheets were manufactured with E-glass, Owens Co...

2011
Hari Prasad

Background and objectives : The fracture of acrylic maxillary complete dentures is a commonly seen clinical problem which usually occurs due to heavy occlusal forces or accidental damage.The objectives of the study were to measure the impact strength of maxillary complete dentures fabricated with high impact acrylic resin and to evaluate the effect of woven E-glass fiber and silane treated glas...

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 ...

C. B. K. Rao N. R. Dakshina Murthy S. R. R. Teja Prathipati,

Brittleness, which was the inherent weakness in High Strength Concrete (HSC), can be avoided by reinforcing the concrete with discontinuous fibers. Reinforcing HSC with more than one fiber is advantageous in an overall improvement of the mechanical performance of the composite. In this experimental study, Hybrid Fiber Reinforced High Strength Concrete (HyFR-HSC) mixes were formed by blending si...

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