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Fracture Toughness Testing Of Small And Standard Bending Specimens
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Book Synopsis Fracture Toughness Testing of Small and Standard Bending Specimens by : D. Kalkhof
Download or read book Fracture Toughness Testing of Small and Standard Bending Specimens written by D. Kalkhof and published by . This book was released on 1998 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work deals with an alternative possibility of performing fracture mechanics testing with small Charpy impact specimens in the same manner as for large, three-point bend-type specimens. The procedure is based upon the determination of Ji, which claims that the J-integral for fracture resistance at stable crack propagation initiation is a characteristic value of the material. It is shown that the results of the application of this procedure are promising in the cases of brittle fracture and brittle/ductile transition.
Book Synopsis Small Specimen Test Techniques by : W. R. Corwin
Download or read book Small Specimen Test Techniques written by W. R. Corwin and published by ASTM International. This book was released on 1998 with total page 630 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of an increasing interest in radiation embrittlement for aging nuclear reactors, scientists gathered in New Orleans in January 1997 to consider the interests and capabilities of the scientific-testing community and of the commercial light-water-cooled power-reactor industry in terms of improving methods to characterize component integrity. The resulting 37 papers concentrate on the use of unique small and miniature specimens; nondestructive, nonintrusive, and in- situ test techniques for measuring mechanical and fracture properties; the application of tests to irradiation-induced embrittlement; and actual examples of tests to determine material integrity and to evaluate potential component life extension. They consider experimental, analytical, and computational aspects. Annotation copyrighted by Book News, Inc., Portland, OR
Author :ASTM International Committee E10 on Nuclear Technology and Applications Publisher :ASTM International ISBN 13 :0803128975 Total Pages :495 pages Book Rating :4.8/5 (31 download)
Book Synopsis Small Specimen Test Techniques by : ASTM International Committee E10 on Nuclear Technology and Applications
Download or read book Small Specimen Test Techniques written by ASTM International Committee E10 on Nuclear Technology and Applications and published by ASTM International. This book was released on 2002 with total page 495 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Contact and Fracture Mechanics by : Pranav H. Darji
Download or read book Contact and Fracture Mechanics written by Pranav H. Darji and published by BoD – Books on Demand. This book was released on 2018-05-30 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains two sections: Chapters 1-7 deal with contact mechanics, and Chapters 8-13 deal with fracture mechanics. The different contributions of this book will cover the various advanced topics of research. It provides some needed background with respect to contact mechanics, fracture mechanics and the use of finite element methods in both. All the covered chapters of this book are of a theoretical and applied nature, suitable for the researchers of engineering, physics, applied mathematics and mechanics with an interest in computer simulation of contact and fracture problems.
Book Synopsis Fracture Toughness Testing by : John E. Srawley
Download or read book Fracture Toughness Testing written by John E. Srawley and published by . This book was released on 1965 with total page 80 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive survey is presented of current methods of fracture toughness testing that are based on linear elastic fracture mechanics. General principles are discussed in relation to the basic two-dimensional crack stress field model and in relation to real three-dimensional specimens. The designs and necessary dimensions of specimens for mixed mode and opening mode (plane strain) crack toughness measurement are considered in detail. Methods of test instrumentation and procedure are described. Expressions for the calculation of crack toughness values are given for the common types of specimens.
Book Synopsis Preferable Initial Crack Length for Fracture Toughness Evaluation Using Sub-sized Bend Specimens by : H-J Schindler
Download or read book Preferable Initial Crack Length for Fracture Toughness Evaluation Using Sub-sized Bend Specimens written by H-J Schindler and published by . This book was released on 2002 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: In order to guarantee maximum crack-tip constraints, fracture toughness testing standards require an initial crack length of about a0 = W/2. When performing impact tests on specimens smaller than the required size the situation is somewhat different: Since the thickness is usually not sufficient to provide plane strain conditions, it is questionable whether the initial crack length should still be about a0 = W/2 to provide maximum in plane constraints. On impact testing of small specimens, shorter cracks exhibit several experimental advantages, the main ones being, first, the lower influence of dynamic oscillations and second, the extended validity range of the measured toughness properties. For these reasons, we suggest to use shorter cracks and account for the insufficient in-plane constraints by correcting the measured (apparent) fracture toughness values. For this purpose the theoretical correction formula is derived in this paper. Based on this correction and the standard size requirements one obtains a lower-bound fracture toughness that can be used as a conservative design value. The latter is shown to be maximum for a relative crack length of about a0/W = 0.25-0.3.
Book Synopsis Developments In Fracture Mechanics Test Methods Standardization by : W. F Brown
Download or read book Developments In Fracture Mechanics Test Methods Standardization written by W. F Brown and published by ASTM International. This book was released on 1977 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Review of Developments in Plane Strain Fracture Toughness Testing by :
Download or read book Review of Developments in Plane Strain Fracture Toughness Testing written by and published by ASTM International. This book was released on 2011 with total page 278 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Applicability of Sub-Charpy-Size Bend and Impact Specimens for Estimation of Fracture Toughness in the Transition Region by : M. Nevalainen
Download or read book Applicability of Sub-Charpy-Size Bend and Impact Specimens for Estimation of Fracture Toughness in the Transition Region written by M. Nevalainen and published by . This book was released on 1999 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: As part of a test program to introduce small specimen test techniques, fracture toughness tests have been performed with 20% side-grooved small (10•10•55 mm) and "ultra-small" (3•4•27, 5•5•27 and 5•10•55 mm) specimens. The objectives were to evaluate the measuring capacity of small specimens and to verify the applicability of the statistical cleavage fracture model of VTT for such test data. Two pressure vessel steels were used in the study. Most of the tests were performed in the transition range and ended at cleavage fracture, but some tests were also conducted in the temperature range of ductile tearing. According to the measured data, the 100 MPa?m reference temperatures (T0), determined even with 3•4 mm specimens, are in good agreement with those of the larger specimens. The statistical specimen size correction only was applied in the analyses, i.e., without any consideration of specimen constraint. The measurements made in the ductile range indicate that practically similar fracture resistance curves can be obtained with the 5•10 mm and larger specimens up to the J-level of 500 kN/m. Also, correlations have been developed, by applying a fracture mechanics approach, for estimating the Charpy transition temperatures of ferritic structural steels from small specimen test data. The correlations were verified by analyzing test data produced with Charpy (ISO-V) and KLST-type subsize specimens (3•4•27 mm). Two energy criterion combinations were applied for determining transition temperatures, i.e., the criteria based on the area of the specimen ligament, being in accordance with the master curve definition, and those derived from an empirical mean relationship found between the upper-shelf energies measured with ISO-V and KLST specimens for various steels. The results show that both of these criteria can be used to give a satisfactory correlation between the transition temperatures and that the standard deviations of the correlations are approximately equal, i.e., around 15°C. A method is proposed for estimating the Charpy upper-shelf energy from subsize specimen data.
Author :National Research Council (U.S.). Committee on Rapid Inexpensive Tests for Determining Fracture Toughness Publisher :National Academies ISBN 13 : Total Pages :266 pages Book Rating :4.3/5 (91 download)
Book Synopsis Rapid Inexpensive Tests for Determining Fracture Toughness by : National Research Council (U.S.). Committee on Rapid Inexpensive Tests for Determining Fracture Toughness
Download or read book Rapid Inexpensive Tests for Determining Fracture Toughness written by National Research Council (U.S.). Committee on Rapid Inexpensive Tests for Determining Fracture Toughness and published by National Academies. This book was released on 1976 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Validation of Miniature Fracture Toughness Specimens for Material Surveillance by : K. Wallin
Download or read book Validation of Miniature Fracture Toughness Specimens for Material Surveillance written by K. Wallin and published by . This book was released on 2002 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture toughness testing in the elastic-plastic temperature range of material behavior is described in the Master Curve standard ASTM 1921-97. The standard allows measurement of valid fracture toughness values up to KJC= 100 MPa?m with clearly smaller than standard CVN-size specimens for the irradiated material condition. However, a relatively small amount of data measured with miniature specimens of cross-sections 5 mm x 5 mm or 3 mm x 4 mm have been published and hence the utilization of such small specimens is generally not accepted even if the universal specimen size criteria are fulfilled. In this study, the fracture toughness transition temperature T0 has been measured for a high phosphorus content WWER 440 weld coded as W502 both in the non-irradiated and in the irradiated and annealed material conditions. Three-point bend specimens of cross-sections 10 mm x 10 mm, 5 mm x 5 mm and 3 mm x 4mm were used in the study.
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 Current Methods of Fracture-toughness Testing of High-strength Alloys with Emphasis on Plane Strain by : J. E. Campbell
Download or read book Current Methods of Fracture-toughness Testing of High-strength Alloys with Emphasis on Plane Strain written by J. E. Campbell and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture-toughness testing using principles of fracture mechanics has developed to the point where it can be used as a basis for selection of materials, for estimating limiting design stresses assuming the presence of small flaws, and for analyzing failures. Current methods of measuring plane-stress and plane-strain fracturetoughness parameters are presented in this report. The specimens include center-cracked, edge-cracked, single-edge-cracked, surface-cracked, and notched round bars, which are subjected to tensile loading, and notched bars for bend tests. The different types of specimens permit evaluating sheet, plate, bar stock, and forgings as well as material from failed structures. Application of fracture-toughness parameters to design of high-strength structures is reviewed for both static and fatigue loading. Consideration of the fracture-mechanics concepts in design should lead to fewer problems with brittle fracture in high-strength structures. (Author).
Book Synopsis Size and Deformation Limits to Maintain Constraint in K[sub Ic] and J[sub C] Testing of Bend Specimens by :
Download or read book Size and Deformation Limits to Maintain Constraint in K[sub Ic] and J[sub C] Testing of Bend Specimens written by and published by . This book was released on 2006 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: The ASTM Standard Test Method for Plane-Strain Fracture Toughness of metallic Materials (E399-90) restricts test specimen dimensions to insure the measurement of highly constrained fracture toughness values (K[sub Ic]). These requirements insure small-scale yielding (SSY) conditions at fracture, and thereby the validity of linear elastic fracture mechanics. Recently, Dodds and Anderson have proposed a less restrictive size requirement for cleavage fracture toughness measured in terms of the J-integral (J[sub c]), as given by a, b, B [ge] 200 J[sub c]/[sigma][sub 0]. The size requirement proposed by Dodds and Anderson increases the applicability of fracture toughness experiments by expanding the range of conditions over which fracture toughness data meeting SSY conditions can be reliably measured. This investigation compares the proposed size requirement with that of ASTM Standard Test Method E399 and, by comparison with published experimental data for various alloys, provides validation of the new requirements.
Book Synopsis Shallow Crack Fracture Mechanics Toughness Tests and Applications by : Michael Graham Dawes
Download or read book Shallow Crack Fracture Mechanics Toughness Tests and Applications written by Michael Graham Dawes and published by Woodhead Publishing. This book was released on 1992-01-15 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: Within the last decade there has been an increasing awareness that use of standards deeply notched fracture mechanics test specimens can result in substantial over-or-under-assessments of the real fracture toughness associated with shallow surface cracks.
Book Synopsis Fracture Testing with Arc Bend Specimens by : J. H. Underwood
Download or read book Fracture Testing with Arc Bend Specimens written by J. H. Underwood and published by . This book was released on 1985 with total page 39 pages. Available in PDF, EPUB and Kindle. Book excerpt: A limited review of existing stress, stress intensity factor, and displacement analyses is compared with new work in order to select arc bend geometries appropriate for fracture testing. Results from the literature for rectangular and arc bend specimens are compared with finite element and boundary collocation results from the present work. Two series of comparative tests were performed, one with arc specimens cut from a steel forging with outer-to-inner radius ratio of 2.5, the other from an aluminum cylinder with outer-to-inner radius ratio of 1.3. Fracture toughness tests KIc and JIc, when appropriate, were performed with standard arc tension specimens and with three-point arc bend specimens both arc and chord support. Conclusions were drawn regarding the appropriate stress intensity factor, crack mouth displacement, and load-line displacement solutions for arc bend fracture specimens. Recommendations were offered for practical ranges of specimen geometry and for reliable test procedures.
Book Synopsis Elastic-plastic Fracture Test Methods by : James Albert Joyce
Download or read book Elastic-plastic Fracture Test Methods written by James Albert Joyce and published by ASTM International. This book was released on 1991 with total page 351 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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