Download or read book Dynamic Fracture Toughness Characteristics of D2 Tool Steel written by Thomas Michael Breunig and published by . This book was released on 1984 with total page 236 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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:

Download or read book Determination of Dynamic Fracture Toughness Properties of Rail Steels written by Melvin F. Kanninen and published by . This book was released on 1987 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Dynamic Fracture Toughness Analysis of H 13 Hot Worked Die Steel by Instrumented Impact Testing written by D. Simon Shong and published by . This book was released on 1983 with total page 264 pages. Available in PDF, EPUB and Kindle. Book excerpt:

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 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.

Download or read book On the Determination of Dynamic Fracture Toughness Properties by Instrumented Impact Testing written by GB. Lenkey and published by . This book was released on 2000 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: In the engineering practice it is of importance to know the effect of loading rate on the material behaviour, e.g., on the fracture mechanics properties. One of the most widely used testing techniques for determining these properties is the instrumented impact test. Depending on the material behaviour under a given loading condition, different fracture mechanics parameters should be determined. Most of the evaluation procedures of these parameters are still not standardised for higher loading rates. So the aim of the present work was to investigate the applicability of different methods for determining dynamic fracture toughness properties. Instrumented impact experiments combining with magnetic emission measurement have been performed on pre-cracked Charpy-V specimens of E420 C and QStE 690 TM high strength steels. Critical values of stress intensity factor (KId, KJi) related to the initiation of the fracture at different temperatures have been determined Using different methods depending on the type of the fracture.

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:

Download or read book Local Approach to Dynamic Fracture Toughness Evaluation written by T. Ochiai and published by . This book was released on 2000 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fracture toughness properties of structural steels of 490-MPa strength class and weld metals under dynamic loading are studied in the light of the near crack tip stress fields. The loading rate in toughness tests range from 0.1 to 500 mm/s. The near-tip stress fields are analyzed by 3D-FEM considering the strain rate effect on the flow properties of materials. Temperature rise caused by high-speed plastic deformation is also included in the FE analysis. The critical CTOD at brittle fracture initiation decreases when increasing the loading rate. This is due to the elevation of a local stress near the crack tip. The local approach is applied to the dynamic fracture toughness evaluation. It is shown that the brittle fracture resistance evaluated in terms of the Weibull stress, an integrated stress over a highly stressed region near the crack tip, is a material property independent of the loading rate. Based on the Weibull stress fracture criterion, the dynamic fracture toughness can be predicted from static toughness results. An engineering procedure to estimate the loading rate effect on the fracture toughness is also presented.

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:

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.

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:

Download or read book Masters Theses in the Pure and Applied Sciences written by Wade H. Shafer and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: Masters Theses in the Pure and Applied Sciences was first conceived, published, SIld disseminated by the Center for Information and Numerical Data Analysis and Synthesis (CINDAS) * at Purdue University in 1957, starting its coverage of theses with the academic year 1955. Beginning with Volume 13, the printing and dissemination phases of the activity were transferred to University Microfilms/Xerox of Ann Arbor, Michigan, with the thought that such an arrangement would be more beneficial to the academic and general scientific and technical community. After five years of this joint undertaking we had concluded that it was in the interest of all con cerned if the printing and distribution of the volumes were handled by an interna and broader dissemination. tional publishing house to assure improved service Hence, starting with Volume 18, Masters Theses in the Pure and Applied Sciences has been disseminated on a worldwide basis by Plenum Publishing Cor poration of New York, and in the same year the coverage was broadened to include Canadian universities. All back issues can also be ordered from Plenum. We have reported in Volume 30 (thesis year 1985) a total of 12,400 theses titles from 26 Canadian and 186 United States universities. We are sure that this broader base for these titles reported will greatly enhance the value of this important annual reference work.

Download or read book Dynamic Fracture Toughness Measurement written by J. Congleton and published by . This book was released on 1973 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt: KId values for PMMA, glass and 'Pitho' tool steel have been measured by a technique based on crack velocity measure-ments. Fracture induced by combined tensile and impact loading can cause a crack to decelerate, pass through a minimum velocity them accelerate again. Crack tip stress in- tensity at the minimum crack velocity is the dynamic fracture toughness for that velocity. Values obtained for PMMA and glass show that KId for slow moving cracks are sig-nificantly smaller than both the corresponding KIc and KId values for fast moving cracks. Reasons for the variation of fracture toughness with crack velocity are discussed. (Author, modified-PL).

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:

Download or read book Dynamic Fracture Toughness of Low alloy Cast Steels written by Jack K. Wang and published by . This book was released on 1982 with total page 208 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book An Analysis Of and Some Observations On Dynamic Fracture in an Impact Test Specimen written by T. Nishioka and published by . This book was released on 1981 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerical simulations of crack-propagation histories in four cases of dynamic tear test experiments on 4340 steel are performed. The influence of the loss of contact of the specimen at various times with either the supports or the tup or both is critically examined. In each case, the variation of the dynamic K-factor, for the simulated crack-propagation history, is directly computed. The results are discussed in the light of current controversies surrounding the dynamic fracture toughness properties governing crack-propagation under impact loading. It is concluded that these controversies may not be fully warranted. (Author).