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Author : Robert L. Tregoning
Publisher :
ISBN 13 :
Total Pages : 360 pages
Book Rating : 4.:/5 (86 download)
Download or read book Dynamic Fracture Toughness Measurements of Tough Ductile Steels written by Robert L. Tregoning and published by . This book was released on 1990 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : RE. Link
Publisher :
ISBN 13 :
Total Pages : 21 pages
Book Rating : 4.:/5 (125 download)
Download or read book Dynamic Fracture Toughness Measurements in the Ductile-to- Brittle Region Using Small Specimens written by RE. Link and published by . This book was released on 2003 with total page 21 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamic fracture toughness of a reactor pressure vessel steel was investigated using small specimens. Precracked Charpy-size SE(B) specimens and circumferentially cracked round bars (CRB) loaded in tension were used to investigate the dynamic fracture toughness of an A533, Gr. B steel plate within the ductile-brittle transition region. The specimens used in this investigation were removed from the broken halves of conventional 4T C(T) specimens that had been utilized in a previous investigation of the dynamic fracture toughness of this material. Crack-tip loading rates in excess of 104 MPa-m1/2/s were achieved in the current tests. Multiple specimens were tested at each temperature in order to permit the determination of the reference temperature, T0. A fracture toughness scaling model for the circumferentially cracked round bar developed by Sciabetta was used to account for the loss of constraint in this specimen. A master curve approach was used to characterize the dynamic toughness in the ductile-brittle region. The shift in transition temperature was compared to a model for the strain rate dependence of T0 developed by Wallin. The shift in transition temperature of the CRB specimen was accurately predicted by the model. The CRB specimen and the dynamic SE(B) specimens gave good results considering the material inhomogeneity typical of the plate tested.
Author : Toshiro Kobayashi
Publisher : Springer Science & Business Media
ISBN 13 : 4431539735
Total Pages : 277 pages
Book Rating : 4.4/5 (315 download)
Download or read book Strength and Toughness of Materials written by Toshiro Kobayashi and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 277 pages. Available in PDF, EPUB and Kindle. Book excerpt: As the shift from the Metal Age progresses, materials engineers and materials scientists seek new analytical and design methods to create stronger and more reliable materials. Based on extensive research and developmental work done at the author’s multi-disciplinary material laboratory, this graduate-level and professional reference addresses the relationship between fracture mechanisms (macroscale) and the microscopic, with the goal of explaining macroscopic fracture behavior based on a microscopic fracture mechanism. A careful fusion of mechanics and materials science, this text and monograph systematically considers an array of materials, from metals through ceramics and polymers, and demonstrates lab-tested strategies to develop desirable high-temperature materials for technological applications.
Author : Welding Institute
Publisher :
ISBN 13 :
Total Pages : 364 pages
Book Rating : 4.:/5 (318 download)
Download or read book Dynamic Fracture Toughness: Papers written by Welding Institute and published by . This book was released on 1977 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : Jason William Reinhart
Publisher :
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (576 download)
Download or read book Dynamic Fracture Toughness Measurements in X70 & X80 Steels written by Jason William Reinhart and published by . This book was released on 2003 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
![Download Dynamic Fracture Toughness Measurements in X70 & X80 Steels [microform] PDF Online Free](https://books.google.com/books/content/images/frontcover/UyaDtgAACAAJ?fife=w200-h370)
Author : Jason William Reinhart
Publisher : Library and Archives Canada = Bibliothèque et Archives Canada
ISBN 13 :
Total Pages : 410 pages
Book Rating : 4.:/5 (576 download)
Download or read book Dynamic Fracture Toughness Measurements in X70 & X80 Steels [microform] written by Jason William Reinhart and published by Library and Archives Canada = Bibliothèque et Archives Canada. This book was released on 2003 with total page 410 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : EM. Hackett
Publisher :
ISBN 13 :
Total Pages : 24 pages
Book Rating : 4.:/5 (125 download)
Download or read book Measurement of Dynamic Fracture Toughness of Ductile Materials written by EM. Hackett and published by . This book was released on 1988 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The primary objective of this study was to demonstrate the applicability of a J-based approach to fracture characterization of ductile alloys subjected to dynamic loading. Three-point-bend [SE(B)] fracture specimens of a high-strength steel were subjected to impact loading in a drop tower, and appropriate strains and displacements were measured to allow estimation of J. A finite element analysis of these experiments was conducted to evaluate the applicability of a J-based fracture characterization scheme and to provide guidance for the experimental measurements. The concept of a transition time was introduced to provide an estimate of the time during which the controlling crack-tip field [Hutchinson-Rice-Rosengren (HRR) field] stabilizes. The paper demonstrates that for fracture times greater than the transition time, J can be accurately evaluated by the quasi-static deep-crack formulation. For the case of the steel SE(B) specimen geometry used for this study, the transition time was approximately 300 s. The finite-element analysis indicated that the net moment carried by the remaining ligament of the specimen could be evaluated by measurements of the flexural and stresses at the quarter-span position on the SE(B) specimen. This was verified experimentally in drop tower experiments utilizing strain gages at the quarter-span position. These results were found to compare well with a load estimation scheme based on a full bridge of strain gages attached to the tension and compression surfaces of the SE(B) specimen. The load accuracy obtained using the full bridge was also found to be insensitive to crack extension and plasticity at the crack tip. Methods of determining the crack initiation point in these dynamic experiments were evaluated. It was found that the double capacitance crack-opening displacement (COD) gage used in the experiments provides an accurate estimate of the crack initiation point.
Author : TJ. Koppenaal
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (125 download)
Download or read book Dynamic Fracture Toughness Measurements of High-Strength Steels Using Precracked Charpy Specimens written by TJ. Koppenaal and published by . This book was released on 1974 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: The dynamic fracture toughness, KId, was measured in a number of ferrous alloys using precracked Charpy specimens and an instrumented impact machine. The alloys investigated included quenched and tempered steels (H-11, D6AC, and 4340), 18Ni maraging steels (grades 200, 250, and 300) and a high-temperature, stainless maraging steel (Pyromet X-15). Standard Charpy specimens were precracked in fatigue and tested at either 72°F (22°C) or -65°F (-54°C). Values of KId, were determined as a function of yield strength and microstructure, and correlations were established between KId and both the energy to initiate fracture, Wm/A, and the total energy of fracture, W/A. The instrumented, precracked Charpy test is shown to be a convenient method of determining relative fracture toughness; under proper conditions this test procedure can be used to determine the dynamic planestrain fracture toughness.
Author : K. Ravi-Chandar
Publisher : Elsevier
ISBN 13 : 0080472559
Total Pages : 265 pages
Book Rating : 4.0/5 (84 download)
Download or read book Dynamic Fracture written by K. Ravi-Chandar and published by Elsevier. This book was released on 2004-10-16 with total page 265 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic fracture in solids has attracted much attention for over a century from engineers as well as physicists due both to its technological interest and to inherent scientific curiosity. Rapidly applied loads are encountered in a number of technical applications. In some cases such loads might be applied deliberately, as for example in problems of blasting, mining, and comminution or fragmentation; in other cases, such dynamic loads might arise from accidental conditions. Regardless of the origin of the rapid loading, it is necessary to understand the mechanisms and mechanics of fracture under dynamic loading conditions in order to design suitable procedures for assessing the susceptibility to fracture. Quite apart from its repercussions in the area of structural integrity, fundamental scientific curiosity has continued to play a large role in engendering interest in dynamic fracture problems In-depth coverage of the mechanics, experimental methods, practical applications Summary of material response of different materials Discussion of unresolved issues in dynamic fracture
Author : RE. Link
Publisher :
ISBN 13 :
Total Pages : 26 pages
Book Rating : 4.:/5 (125 download)
Download or read book Analysis of Dynamic Fracture and Crack Arrest of an HSLA Steel in an SE(T) Specimen written by RE. Link and published by . This book was released on 2006 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt: A single edge notch tension, SE(T), specimen was used to measure the dynamic fracture toughness and the crack arrest toughness of a tough HSLA steel in the ductile-brittle transition region. The SE(T) specimen was considerably smaller (W = 152 mm) than wide-plate specimens that have been typically used in other crack arrest tests. A thermal gradient was applied across the ligament of the specimen to facilitate a brittle crack initiation in the low temperature region of the specimen. The cleavage crack propagated into warmer and, consequently, tougher material which led to crack arrest. Transient, three-dimensional, finite element analyses of the tests were performed to determine the dynamic fracture and crack arrest toughness of the steel. The analyses employed both linear elastic and visco-plastic constitutive models. Dynamic strain measurements recorded during the run-arrest event were used to determine the crack tip position as a function of time during the event. This information was used as a boundary condition for the analysis. The measured strains were compared with strains predicted by the finite element analysis to validate the model. The dynamic response of the specimen, the effect of crack speed on the driving force, and the evolution of crack tip plasticity during the run-arrest event are discussed.
Author : Kan-San Liu
Publisher :
ISBN 13 :
Total Pages : 274 pages
Book Rating : 4.:/5 (976 download)
Download or read book Dynamic Fracture Toughness Measurements of Low Alloy Steel Castings written by Kan-San Liu and published by . This book was released on 1983 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : H. Conque
Publisher :
ISBN 13 :
Total Pages : 13 pages
Book Rating : 4.:/5 (125 download)
Download or read book Using Small Specimens to Measure Dynamic Fracture Properties of High-Toughness Steels written by H. Conque and published by . This book was released on 1992 with total page 13 pages. Available in PDF, EPUB and Kindle. Book excerpt: The use of coupled pressure bars (CPB) to induce dynamic fracture in tough materials using small specimens is investigated. CPB experiments were performed with a nuclear pressure vessel steel, A533 Grade B Class 1, over the temperature range 37 to 100°C. The dynamic fracture initiation toughness at a stress intensity loading rate, KI, of 2 x 106 MPa•m1⁄2 s-1 was deduced from the simulation of the fracture experiment with a dynamic viscoplastic finite-element fracture code. At 100°C, no cleavage fracture was observed for either dynamic crack initiation or subsequent propagation and arrest. A procedure to measure initiation, propagation, and arrest toughnesses of nuclear pressure vessel steels up to service temperature with CPB specimens is introduced.
Author : Alan F. Liu
Publisher : ASM International
ISBN 13 : 1615032525
Total Pages : 452 pages
Book Rating : 4.6/5 (15 download)
Download or read book Mechanics and Mechanisms of Fracture written by Alan F. Liu and published by ASM International. This book was released on 2005-01-01 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author :
Publisher :
ISBN 13 :
Total Pages : 42 pages
Book Rating : 4.:/5 (227 download)
Download or read book Dynamic Fracture Toughness Parameters for HY-80 and HY-130 Steels and Their Weldments written by and published by . This book was released on 1979 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lower bound dynamic fracture toughness parameters for HY-80 and HY- 130 steel and their weld metals are identified. Specific values of the parameters K sub Id and K sub Im obtained from direct measurements are reported together with estimates inferred from the large body of Charpy energy, nil ductility transition temperature and dynamic tear energy measurements. The emphasis is on reasonable lower bound values at 30 F, the lowest anticipated service temperature, for use in elastodynamic analyses of crack growth initiation, propagation, and arrest in ship structures. For these conditions, it has been found that the ratio K sub Id/RHO sub Y is approximately sq root of 1 in. Consequently, HY-80 plate appears to be substantially more resistant to fracture under dynamic loading than are the other three grades examined.
Author : G. Tang
Publisher :
ISBN 13 :
Total Pages : 17 pages
Book Rating : 4.:/5 (799 download)
Download or read book Dynamic Fracture Toughness and Characteristics of Ductile-brittle Transition of V-Ti-N Microalloyed Steel written by G. Tang and published by . This book was released on 1995 with total page 17 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Author : DF. Cannon
Publisher :
ISBN 13 :
Total Pages : 19 pages
Book Rating : 4.:/5 (125 download)
Download or read book The Development of Standard Methods for Determining the Dynamic Fracture Toughness of Metallic Materials written by DF. Cannon and published by . This book was released on 1992 with total page 19 pages. Available in PDF, EPUB and Kindle. Book excerpt: A simple, reliable, and repeatable method has been developed for determining dynamic plane-strain fracture toughness using an on-specimen strain gage. This extends the range of the British Standard Method for Determination of the Dynamic Fracture Toughness of Metallic Materials (BS 6729) to include measurement at impact testing rates. Dynamic finite element computing was used to optimize the position of the gage on the specimen. In tests at low loading rates on Charpy specimens, good agreement was found between toughness values calculated from the applied load and the calibrated gage, and with those measured by the shadow optic caustic technique. At higher rates, several gage types and two adhesives were compared. A satisfactory method was developed for performing tests at high and low temperatures. The technique was applied to larger bend specimens of two steels, and a test program was conducted at seven laboratories to assess the influence of testing machine and instrumentation variables. From the results, a standard calibration and test procedure has been developed.
Author : P. McConnell
Publisher :
ISBN 13 :
Total Pages : 14 pages
Book Rating : 4.:/5 (125 download)
Download or read book Dynamic Fracture Toughness of Ductile Iron written by P. McConnell and published by . This book was released on 1992 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dynamic J-integral fracture-toughness test results were obtained for several different ductile irons over a range of temperatures. The ductile irons were all of a chemistry and microstructure in nominal compliance with ASTM Specification for Ferritic Ductile Iron Suitable for Low Temperature Service (A 874).
