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Fracture Toughness Of Polymer Concrete Materials Using Various Chevron Notched Configurations
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Book Synopsis Fracture Toughness of Polymer Concrete Materials Using Various Chevron-Notched Configurations by : ER. Fuller
Download or read book Fracture Toughness of Polymer Concrete Materials Using Various Chevron-Notched Configurations written by ER. Fuller and published by . This book was released on 1984 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: The fracture toughness of two similar polymer concrete materials was determined using several fracture mechanics configurations to show any influence of crack geometry on resistance to fracture in these materials. The testing configurations included a conventional straight-through notch in a flexure bar and various chevron-notched geometries in both flexure-bar and short-rod specimens. The materials were polymerized mixtures of monomers, anhydrous Type III portland cement, and silica sand. In one composition the monomers were styrene and trimethylolpropane-trimethacrylate; whereas, in the other composition, acrylonitrile was added as well. The fracture toughness was calculated from published stress-intensity coefficients for the straight-through notch which were adapted for use with a chevron notch by assuming that the derivative of the compliance with respect to crack length was the same for both notch types. Effects of varying chevronnotched angle, chevron-vertex position, and width of specimen in the crack plane were examined. Variation of these parameters to produce a wide variation in the width of the crack front shows minor if any influence on the fracture toughness measurements. In contrast, however, the calculated amount of crack extension for all the various specimen configurations indicates a trend of fracture toughness which is consistent with the concept of a rising crack-growth resistance curve for these materials.
Book Synopsis Chevron-notched Specimens, Testing and Stress Analysis by : John H. Underwood
Download or read book Chevron-notched Specimens, Testing and Stress Analysis written by John H. Underwood and published by ASTM International. This book was released on 1984 with total page 353 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book NBS Special Publication written by and published by . This book was released on 1968 with total page 416 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Institute of Standards and Technology ... Catalog by : National Institute of Standards and Technology (U.S.)
Download or read book Publications of the National Institute of Standards and Technology ... Catalog written by National Institute of Standards and Technology (U.S.) and published by . This book was released on 1986 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications by : United States. National Bureau of Standards
Download or read book Publications written by United States. National Bureau of Standards and published by . This book was released on 1986 with total page 408 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Inorganic Materials Division by : Center for Materials Science (National Measurement Laboratory). Inorganic Materials Division
Download or read book Inorganic Materials Division written by Center for Materials Science (National Measurement Laboratory). Inorganic Materials Division and published by . This book was released on 1984 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Publications of the National Bureau of Standards ... Catalog by : United States. National Bureau of Standards
Download or read book Publications of the National Bureau of Standards ... Catalog written by United States. National Bureau of Standards and published by . This book was released on 1986 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Short Bar Chevron-Notch Fracture Toughness of Bone Cement by : SK. Bhambri
Download or read book Short Bar Chevron-Notch Fracture Toughness of Bone Cement written by SK. Bhambri and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: Poly(methylmethacrylate) is used as a grouting agent in total joint arthroplasty. Fracture toughness of the relatively brittle bone cement is an important property determining the reliability and defect tolerance capability of the material. In the present study, fracture toughness of bone cement and commercial PMMA has been determined using a short bar chevron-notch test method. Chevron-notched short bar specimens were prepared with a notch molded-in during the polymerization process or by machining techniques. Specimen size and other test parameters were varied to determine variability of the results. In addition, parameters were also varied to simulate clinical practices.
Book Synopsis Chevron-notch Fracture Test Experience by : Kevin R. Brown
Download or read book Chevron-notch Fracture Test Experience written by Kevin R. Brown and published by ASTM International. This book was released on 1992 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviews the latest information and experimentation on the fracture-toughness testing of materials using specimens that are chevron notched, a procedure that has been an ASTM standard only since December 1989. The 13 papers were presented at a symposium in Indianapolis, May 1991; they include studies
Book Synopsis Fracture Mechanics of Concrete by : Alberto Carpinteri
Download or read book Fracture Mechanics of Concrete written by Alberto Carpinteri and published by Springer. This book was released on 1984-08-31 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt: In this volume on the mechanics of fracture of Portland cement concrete, the general theme is the connection between microstructural phenomena and macroscopic models. The issues addressed include techniques for observation over a wide range of scales, the influence of .microcracking on common measures of strength and de formability , and ultimately, the relationship between microstructural changes in concrete under load and its resistance to cracking. It is now commonly accepted that, in past attempts to force-fit the behavior of concrete into the rules of linear elastic fracture mechanics, proper attention has not been paid to scale effects. Clearly, the relationships among specimen size, crack length and opening, and characteristic material fabric dimensions have been, in comparison to their counterparts in metals, ceramics, and rocks, abused in concrete. Without a fundamental understanding of these relationships, additional testing in search of the elusive, single measure of fracture toughness has spawned additional confusion and frustration. No one is in a better position to document this observation than Professor Mindess.
Book Synopsis Brittle Failure of Rock Materials by : G.E. Andreev
Download or read book Brittle Failure of Rock Materials written by G.E. Andreev and published by CRC Press. This book was released on 1995-01-01 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: This text comprises different basic aspects of brittle failure for rocks. It considers classical and contemporary models, as well as failure patterns under different loading schemes.
Book Synopsis Fracture of Polymers, Composites and Adhesives II by : J G Williams
Download or read book Fracture of Polymers, Composites and Adhesives II written by J G Williams and published by Elsevier. This book was released on 2003-11-26 with total page 591 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture of Polymers, Composites and Adhesives II
Book Synopsis Fracture Failure Analysis of Fiber Reinforced Polymer Matrix Composites by : Sanjay Mavinkere Rangappa
Download or read book Fracture Failure Analysis of Fiber Reinforced Polymer Matrix Composites written by Sanjay Mavinkere Rangappa and published by Springer Nature. This book was released on 2021-04-19 with total page 212 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents a unified approach to fracture behavior of natural and synthetic fiber-reinforced polymer composites on the basis of fiber orientation, the addition of fillers, characterization, properties and applications. In addition, the book contains an extensive survey of recent improvements in the research and development of fracture analysis of FRP composites that are used to make higher fracture toughness composites in various applications.The FRP composites are an emerging area in polymer science with many structural applications. The rise in materials failure by fracture has forced scientists and researchers to develop new higher strength materials for obtaining higher fracture toughness. Therefore, further knowledge and insight into the different modes of fracture behavior of FRP composites are critical to expanding the range of their application.
Book Synopsis Fracture Mechanics for Concrete Materials by : Cumaraswamy Vipulanandan
Download or read book Fracture Mechanics for Concrete Materials written by Cumaraswamy Vipulanandan and published by . This book was released on 2001 with total page 300 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Determination of Fracture Toughness Characteristics of Small- Size Chevron-Notched Specimens by : Yevgeny Deryugin
Download or read book Determination of Fracture Toughness Characteristics of Small- Size Chevron-Notched Specimens written by Yevgeny Deryugin and published by . This book was released on 2018 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: A new method is proposed to determine fracture toughness of structural materials according to the test data of non-standard small-size chevron-notched specimens. During the tests, loading diagrams and photographic images of the specimens taken in time intervals are obtained. The crack length is measured in the process of its initiation and propagation. The analytical expressions are obtained being based and derived from the constitutive equations of engineering fracture mechanics to determine the crack-driving force (specific fracture energy) and the stress intensity factor. The method allows us to exclude the periodic unloading of the specimen applied under standard test conditions to determine the change in specimen compliance, which is taken into account in constitutive equations at crack length increase. All necessary calculation parameters are determined according to the experimental data. The method allows us to certify fracture toughness of the material without restrictions regarding the amount of plastic deformation and in front of the crack tip and in the specimen as a whole. The examples are given to calculate the fracture toughness criteria for a number of structural materials characterized by the ability to plastic deformation and by the Young's modulus value.
Book Synopsis Government Reports Annual Index by :
Download or read book Government Reports Annual Index written by and published by . This book was released on 1991 with total page 1654 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Quantitative Fractography by : Stephanie Difrancesco
Download or read book Quantitative Fractography written by Stephanie Difrancesco and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: At a 95% confidence level, the student t-test verified quantitative fractography fracture toughness was not statistically different from the standardized SENB or chevron flexure methods. Fracture toughness evaluated at different W/B sample ratios also did not change SENB K1c measurements. Although the chevron samples demonstrated unstable crack extension due to catastrophic failure from the chevron notch tip, the mean critical chevron fracture toughness was not statistically different from the other standardized techniques. Acetone also did not affect the K1c measurements regardless of technique. An ANOVA analysis performed at a 95% confidence level determined no statistical difference between fracture toughness measured with standardized techniques. A statistical difference, however, was detected when fracture toughness using quantitative fractography was applied to the failed SENB fracture features. Quantitative fractography on the failed SENB fracture features showed that the crack assumed to occur along the entire length of the SENB macro notch by the SENB standardized technique seldom occurs in reality. In contrast, failure in the tested samples typically resulted from semi-elliptical flaws which suggest the flaw size assumed by the standardized techniques is not appropriate. Modeling methods such as finite element analysis should be used in the future to combine independent notch, pre-crack, and semi-elliptical elements to model the observed behavior more effectively.
