Author: M. Satoh
Publisher:
ISBN:
Category : A 508 steel
Languages : en
Pages : 14
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Book Description
The effect of the loading rate on elastic-plastic fracture toughness, which defines stable crack initiation, has not been clear; therefore, the test method of elastic-plastic fracture toughness under rapid loading (rapid-loading fracture toughness JId) has not yet been established in ASTM Test Method for JIc, a Measure of Fracture Toughness (E 813-81).
Author: Ralph Papirno
Publisher: ASTM International
ISBN: 0803112513
Category : Hardness
Languages : en
Pages : 252
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Book Description
The 17 peer-reviewed papers describe investigations where the precision of test procedures were either examined (to study the precision) or enhanced (to increase the precision). Topics include hardness testing, fatigue and fracture testing, and specimen alignment and gripping problems. Annotation co
Author: Ravinder Chona
Publisher: ASTM International
ISBN: 080311429X
Category : Metals
Languages : en
Pages : 187
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Book Description
Author: P. B. Hirsch
Publisher: CRC Press
ISBN: 1000724808
Category : Technology & Engineering
Languages : en
Pages : 237
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Book Description
This volume brings together the papers presented at the 7th Symposium organised by the Technical Advisory Group on Structural Integrity of Nuclear Plant (TAGS!) which was held at the TWI Conference Centre, Great Abington, UK on 29 April 1999. The Symposium, which marked 25 years of TAGSI and its predecessor, the Light Water Reactor Study Group (LWRSG), was dedicated to Sir Alan Cottrell FREng, FRS, whose impact on the fields of integrity, reliability and safety of engineering structures and components has been second to none.
Author: National Research Council (U.S.). Committee on Rapid Inexpensive Tests for Determining Fracture Toughness
Publisher: National Academies
ISBN:
Category : Technology & Engineering
Languages : en
Pages : 266
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Book Description
Author: John E. Srawley
Publisher:
ISBN:
Category : Fracture mechanics
Languages : en
Pages : 80
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Book Description
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.
Author: J. Congleton
Publisher:
ISBN:
Category :
Languages : en
Pages : 84
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Book Description
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).
Author: Stanley Theodore Rolfe
Publisher:
ISBN:
Category : Hulls (Naval architecture)
Languages : en
Pages : 136
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Book Description
The Report provides comprehensive toughness criteria for welded ship hulls that can be used for steels of all strength levels. Because of the fact that stress concentrations are always present in large complex welded structures and therefore high stresses as well as discontinuities or flaws will be present in welded ship hulls, primary emphasis in the proposed fracture-control guidelines is placed on the use of steels with moderate levels of notch-toughness and on the use of properly designed crack arresters. In general, concepts of fracture mechanics are used to develop the material toughness level that is required for fail-safe operation of welded ship hulls.
Author: CE. Turner
Publisher:
ISBN:
Category : Brittle fracture
Languages : en
Pages : 22
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Book Description
Previous studies of the Charpy impact test using instrumented pendulum or anvil with V-noteh steel specimens are reviewed. It is concluded that such results add little to the usefulness of the test since even cleavage fractures are normally well beyond yield. No fracture toughness index emerges other than the simple measure of energy from the pendulum. In a second generation of work, fatigue cracked and side grooved (fcsg) specimens promoted below yield fractures up to about the 50 percent fracture appearance transition temperature (fatt). These results have been analysed by linear fracture mechanics to give the dynamic fracture toughness KID. In this interpretation understanding of the oscillations in load records due to specimen vibration is important. Results are discussed in the light of recent studies including an analog model with which near quantitative agreement is found. An improved simple correction factor for inertia loading effects is presented. It is concluded from both this work and supporting measurements of KID by other techniques that dynamic fracture toughness KID can be measured for low-strength steels using the instrumented fcsg impact test subject to the precautions and corrections discussed. Typical values of KID for mild steel are 60 ksi ?in. at 0 C falling to 30 ksi ?in. at -60 C. The significance of these low values in relation to the much higher static toughness is discussed briefly.
Author: American Society for Testing and Materials
Publisher: ASTM International
ISBN:
Category : Impact
Languages : en
Pages : 222
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