By D. E. McCabe, J. G. Merkle, K. Wallin

ISBN-10: 0803133685

ISBN-13: 9780803133686

ISBN-10: 0803145594

ISBN-13: 9780803145597

This new ASTM guide introduces the idea that of the grasp Curve technique so it may be understood and utilized by engineers who've had restricted publicity to elastic-plastic fracture mechanics and/or complicated statistical tools. It addresses the sensible design-related challenge of defining the ductile-to-brittle fracture transition temperature of structural steels at once when it comes to fracture mechanics info. themes disguise: • historical past and historic elements • information validity specifications imposed on attempt information, and the variety of information required to represent a statistically useable info set for deciding on a reference temperature, To • try specimens that may be used to boost legitimate KJc • Fixturing and attempt gear wishes • coaching of specimens (precracking and side-grooving) for trying out • try out machines, their mode of operation, and prompt specimen loading premiums • the entire details had to calculate values of KJc • Scale parameter statistical equations for cloth checking out • moment alternative for calculating the To temperature that's useable while KJc info were generated at quite a few attempt temperatures • How the range of KJc values is dealt with utilizing the three-parameter Weibull version • details on recommendations lower than examine • short dialogue of significant issues eager about at once utilizing grasp Curve fracture longevity info to the fracture-safety research of exact constructions

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Additional resources for An Introduction to the Development and Use of the Master Curve Method (ASTM Manual) (Astm Manual Series, Mnl 52)

Sample text

ORNL 2003-02427/dgc 9 Rod Thd. 2501 O05W i m. 002 in. T. LR. 005 W). 002 in. 081 mm. Note 3 - Corners of the clevis may be removed if necessary to accommodate the clip gage. ' ~ Fig. lO~Clevis design used to test compact specimens. Material used should be high strength steel. 3iClip Gages Making clip gages such as that shown in Fig. 12 is a feasible venture given reasonab]e manual skills. However, it is far more practical to purchase commercially available gages. Make or purchase a d i p gage of the following characteristics: 1.

If the remaining data are multiple temperature data, use To in Eq 10 and calculate the master curve. See Fig. 19 to select the lowest Kjr value. Then calculate TOusing Eq 25. at) O/ os / 0 O / O J O s~' ~ 9J~ estin of To (Kmat) t t~ ""~ ~ estimate ^ T (~ Fig. 19--Principleof SlNTAPsystem3 analysis(minimumvalue estimation). MNL52-EB/May 2005 Applications T H E M A S T E R CURVE CONCEPT H A S I N T R O D U C E D TEST PRACTICES AND an analysis methodology that has made fracture mechanics, as applied to structural steels, a practical technology.

13. The duration of transient cooling is dictated by the measured skin temperature of the specimen. The internal temperature of steel specimens will equalize with the skin temperature within a few minutes of reaching a constant skin temperature. ) of specimen thickness is primarily needed to stabilize the temperature control within the enclosure. ~ : C1 Optional T1 Knife 20 k y \ / \ ! I \\ \ I N ], J Fig. 12--The most common type of clip gage used in fracture mechanics tests. ORNL 2003-02431/dgc N L + I ) + Thermocouple Attachment Locations Fi9.

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An Introduction to the Development and Use of the Master Curve Method (ASTM Manual) (Astm Manual Series, Mnl 52) by D. E. McCabe, J. G. Merkle, K. Wallin


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