Fiberglass-reinforced Epoxy Research Articles

AN IMPROVED STRESSED-SKIN SUPPORT FOR ARTWORKS ON CANVAS OR PAPER

AN IMPROVED STRESSED-SKIN SUPPORT FOR ARTWORKS ON CANVAS OR PAPER

A compact 0.8T superconducting MRI magnet

A compact, cryogen-free 0.8T superconducting MRI magnet has been woundusing Nb 3Sn tape conductor and is maintained at 8K using a two-stage Gifford-McMahon refrigerator. The magnet is housed in a low eddy-current cryostat which incorporates a fiberglass-reinforced epoxy (FRE) vacuum enclosure with an integral stainless-steel permeation barrier, a composite copper/fiberglass thermal shield heat stationed to the first stage of the cryocooler, and a FRE magnet support structure heat stationed to the second stage of the cryocooler. The low eddy-current components eliminate the need to shield the gradient coils. The magnet components and the measured performance characteristics of the system are described in detail.

Investigation of leaks in fiberglass-reinforced pressure vessels by direct observation of hollow fibers in glass cloth

A simple method of visual observation of hollow fibers within fiberglass cloth has been developed. This visualization can aid in determining the contribution these fibers make toward leaks observed in fiberglass-reinforced epoxy resin pressure or vacuum vessels. Photographs and frequency data of these hollow fibers are provided.

Griffith Fracture Criterion and Concrete

The original Griffith fracture criteria was developed to describe the rapid extension of a crack in a homogeneous elastic body. To check the applicability of the Griffith theory to portland cement systems which are neither elastic nor homogeneous, specimens of hardened cement paste, mortar and concrete made with normal and lightweight aggregates, and with notches of varying lengths were tested in flexure and in tension. While the paste specimens were notch-sensitive, mortar and concrete strengths were independent of notch length. The notch-insensitivity of mortar and concrete appears to be due to their composite nature. Similar behavior occurs in glass-Al²O³, fiberglass-reinforced epoxy and tungsten-reinforced copper composites. It appears that for mortar and concrete the direct application of Griffith criteria is not valid up to a certain length of cracks. This critical length depends on the size, volume, and type of aggregate.

FIBERGLASS REINFORCED EPOXY PIPE The new corrosion-resistant, tough-job pipe from Koppers research

RETURN TO ISSUEPREVAdvertisementNEXTFIBERGLASS REINFORCED EPOXY PIPE The new corrosion-resistant, tough-job pipe from Koppers researchCite this: Chem. Eng. News 1964, 42, 49, 12–13Publication Date (Print):December 7, 1964Publication History Published online6 November 2010Published inissue 7 December 1964https://doi.org/10.1021/cen-v042n049.p012Copyright © 1964 AMERICAN CHEMICAL SOCIETYArticle Views9Altmetric-Citations-LEARN ABOUT THESE METRICSArticle Views are the COUNTER-compliant sum of full text article downloads since November 2008 (both PDF and HTML) across all institutions and individuals. These metrics are regularly updated to reflect usage leading up to the last few days.Citations are the number of other articles citing this article, calculated by Crossref and updated daily. Find more information about Crossref citation counts.The Altmetric Attention Score is a quantitative measure of the attention that a research article has received online. Clicking on the donut icon will load a page at altmetric.com with additional details about the score and the social media presence for the given article. Find more information on the Altmetric Attention Score and how the score is calculated. Share Add toView InAdd Full Text with ReferenceAdd Description ExportRISCitationCitation and abstractCitation and referencesMore Options Share onFacebookTwitterWechatLinked InReddit PDF (2 MB) SUBJECTS:Organic polymers Get e-Alerts