نتایج جستجو برای: دورپیچ cfrp

تعداد نتایج: 3640  

2013
Md. A. Alam M. Z. Jumaat

Strengthening of reinforced concrete beams using externally bonded CFRP laminate is the most popular choice. However, premature end peeling of CFRP laminate has been shown to be the main weakness of this method. Development of high shear and normal stresses at the end of strengthening laminate is the key reason to cause end peeling which is not preventable by conventional anchoring system. This...

در این مطالعه به بررسی عددی رفتار تیرهای بتن‌آرمه با خاموت‌های دورپیچ مستطیلی تحت بارگذاری پیچشی پرداخته شده‌است. این مقاله آنالیز اجزاء محدود، شامل نتایج آزمایشگاهی 27 تیر بتنی دارای خاموت‌گذاری دورپیچ مستطیلی را ارائه می‌دهد، که در آن خاموت‌های دورپیچ مستطیلی دارای فواصل و زاویه ساق‌های قائم و افقی متفاوت می‌باشند و توسط نرم افزار آباکوس به روش تحلیل ضمنی Explicit صحت‌سنجی شده‌اند. شرایط محصو...

Journal: :Comput. Graph. Forum 2012
Andreas Reh B. Plank Johann Kastner Eduard Gröller Christoph Heinzl

In this work a novel method for the characterization of porosity in carbon fiber reinforced polymers (CFRP) is presented. A visualization pipeline for the interactive exploration and visual analysis of CFRP specimens is developed to enhance the evaluation workflow for non-destructive testing (NDT) practitioners based on specified tasks. Besides quantitative porosity determination and the calcul...

2018
Kun Zhang Wenhui Tang Kunkun Fu

Carbon fiber-reinforced polymer (CFRP) composites have been increasingly used in spacecraft applications. Spacecraft may encounter highenergy-density X-ray radiation in outer space that can cause severe damage. To protect spacecraft from such unexpected damage, it is essential to predict the dynamic behavior of CFRP composites under X-ray radiation. In this study, we developed an in-house three...

2009
M. S. Ha O. Y. Kwon H. S. Choi

The improvement of electrical conductivity of carbon-fiber reinforced plastics (CFRP) has been investigated by conductive silver nano-particles coating for the purpose of aircraft lightning protection. Silver nano-particles in colloid were sprayed on the surface of carbon fibers, which were then impregnated by epoxy resin to form a CFRP specimen. Electrical resistance was measured by contact re...

2001
Antonio Nanni Thomas Boothby

The opinions, findings and conclusions expressed in this report are those of the principal investigator and the Missouri Department of Transportation. They are not necessarily those of the U. EXECUTIVE SUMMARY This report presents the results of a pilot study to apply externally bonded Carbon Fiber Reinforced Polymer (CFRP) sheets to strengthen a simple span reinforced concrete solid slab bridg...

2016
Ali Zarafshani Thomas Bach Chris Chatwin

Electrical Impedance Tomography (EIT) as an imaging technique producing a 2D or 3D impedance image (conductivity or impedivity) of the subject under test. It can be used for delamination detection and evaluating the damage location, size, strain and severity for Structure Health Monitoring (SHM) of aerospace composites i.e. Carbon-fibrereinforced polymer (CFRP) composites. Keywords—Electrical I...

2015
Guibing Li Aihui Zhang Yugang Guo

Most of the laboratory tests investigated the flexural performance of un-preloaded or undamaged RC beams strengthened with CFRP composites. However, in engineering applications, the structural member must carry a certain load or damage. There is a lack of systematical investigations on the effects of preload or damage level on the flexural load-carrying capacity of CFRP-strengthened RC beams. T...

2003
S. Rizkalla

The need for repair and strengthening of deteriorated, damaged and substandard infrastructures has become an important challenge worldwide. The demand for increasingly heavier truck loads is forcing bridge owners to upgrade existing structures. In response to the growing need for concrete repair and rehabilitation, an experimental program was conducted to investigate the feasibility of using di...

2005
D. Schnerch B. Lanier S. Rizkalla

Many steel structures are in need of strengthening due to reqUirements to increase carrying capacity and/or rehabili tation due to corrosion degradation. This paper summarizes the results of an investigation that has been conducted to evaluate the performance of carbon fiber reinforced polymer (CFRP) materials to increase the strength and stiffness of steel structures. Two types of specimens we...

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