Download or read book On the Experimental Calibration of a Potential Drop System for Crack Length Measurements in a Compact Tension Specimen written by G. Belloni and published by . This book was released on 2002 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt: The present study was focused on the setup of a system for monitoring deep cracks in notched specimens in creep and fatigue laboratory tests. The test configuration features, the instrumentation requirements, and the important problems of the calibration for potential drop application to both fatigue and creep crack growth tests on compact tension specimens are discussed in detail. Experimental tests on the compact tension specimen geometry were carried out at ambient and high temperatures in order to define and validate an experimental calibration for this specimen geometry, to check the effect of temperature, and to compare the crack growth calibration curves under creep or fatigue conditions.

Download or read book Fatigue Crack Propagation in Metals and Alloys written by Ulrich Krupp and published by John Wiley & Sons. This book was released on 2007-04-09 with total page 312 pages. Available in PDF, EPUB and Kindle. Book excerpt: This comprehensive overview of the whole field of fatigue and fracture of metallic materials covers both the theoretical background and some of the latest experimental techniques. It provides a summary of the complex interactions between material microstructure and cracks, classifying them with respect to the overall damage process with a focus on microstructurally short cracks and dynamic embrittlement. It furthermore introduces new concepts for the numerical treatment of fatigue microcrack propagation and their implementation in fatigue-life prediction models.This comprehensive overview of the whole field of fatigue and fracture of metallic materials covers both the theoretical background and the latest experimental techniques. It provides a summary of the complex interactions between material microstructure and cracks, classifying them with respect to the overall damage process. It furthermore introduces new concepts for the numerical treatment of fatigue microcrack propagation and their implementation in fatigue-life prediction models.

Download or read book High Temperature Component Life Assessment written by George Webster and published by Springer Science & Business Media. This book was released on 1994-03-31 with total page 350 pages. Available in PDF, EPUB and Kindle. Book excerpt: The aim of this book is to investigate and explain the rapid advances in the characterization of high temperature crack growth behaviour which have been made in recent years, with reference to industrial applications. Complicated mathematics has been minimized with the emphasis placed instead on finding solutions using simplified procedures without the need for complex numerical analysis.

Download or read book Notes on Direct Current Potential Drop Calibration for Crack Growth in Compact Tension Specimens written by J. Tong and published by . This book was released on 2001 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt: In using the direct current potential drop method for crack growth measurement, a suitable reference location on the test piece of a compact tension (CT) specimen seems difficult to find and yet is highly desirable for high-temperature long-term testing. This short report presents a possible solution that seems promising based on our preliminary test results. Vanations in the potential and current lead placement were also evaluated for some typical lead configurations in CT specimens.

Download or read book Fatigue Crack Growth Measurement and Data Analysis written by S. J. Hudak and published by ASTM International. This book was released on 1981 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Frattura ed Integrit Strutturale Annals 2013 written by AA.VV. and published by Gruppo Italiano Frattura. This book was released on 2013-12-31 with total page 650 pages. Available in PDF, EPUB and Kindle. Book excerpt: Frattura ed Integrità Strutturale (Fracture and Structural Integrity) is the official Journal of the Italian Group of Fracture (ISSN 1971-8993). It is an open-access Journal published on-line every three months (July, October, January, April). Frattura ed Integrità Strutturale encompasses the broad topic of structural integrity, which is based on the mechanics of fatigue and fracture, and is concerned with the reliability and effectiveness of structural components. The aim of the Journal is to promote works and researches on fracture phenomena, as well as the development of new materials and new standards for structural integrity assessment. The Journal is interdisciplinary and accepts contributions from engineers, metallurgists, materials scientists, physicists, chemists, and mathematicians.

Download or read book Experimental Determination of the Dependence of Crack Extension Force on Crack Length for a Single edge notch Tension Specimen written by John E. Srawley and published by . This book was released on 1964 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The single-edge-notch form of a plane-strain (or opening mode) crack toughness specimen is particularly economical in regard to available test material and testing machine capacity. The necessary calibration relation for a particular design of a single-edge-notch specimen centrally loaded in tension, was determined from a series of compliance measurements at crack lengths ranging from zero to one-half the specimen width. The accuracy of the calibration is estimated to be +1/2 percent in the range of interest. Agreement with concurrent results obtained by boundary collocation of an appropriate stress function is excellent. Alternative types of specimen are discussed, and the relation between necessary specimen size and the ratio of toughness to yield strength is emphasized.

Download or read book Determining the Potential Drop Calibration of a Fatigue Crack Growth Specimen Subject to Limited Experimental Observations written by PC. McKeighan and published by . This book was released on 1994 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Six separate calibration techniques are applied to potential drop (PD) and crack length data from 23 experimental datasets. Five of the techniques use limited experimental input gained during precracking and after test completion to derive the coefficients associated with the calibrations. The datasets include SE(B) and M(T) specimens, fatigue crack growth (FCG) tests and foil analog simulations as well as various aluminum alloys and steel. A comparison of the calibration techniques is undertaken in terms of crack length and the subsequent effect on stress intensity factor errors. The best calibration techniques using two PD and crack length data pairs are the two-point modified and post-test corrected Johnson's equation. Using these methods, 21 of the 23 tests satisfy a criterion based on an acceptable ±2% mean variation in stress intensity factor. If a statistical assessment of the data is made, only 30 to 35% of the tests satisfy this criterion. Finally, the crack length prediction errors that result from the different calibrations can typically cause a 15 to 30% variation in FCG rate da/dN at a given ?K level. This difference is found to be primarily due to errors in the ?K calculation.

Download or read book Automated Test Methods for Fracture and Fatigue Crack Growth written by W. H. Cullen and published by ASTM International. This book was released on 1985 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fracture Mechanics written by Ravinder Chona and published by ASTM International. This book was released on 1993 with total page 864 pages. Available in PDF, EPUB and Kindle. Book excerpt: The proceedings of the 23rd National Symposium on Fracture Mechanics, held in College Station, Texas, June 1991, present a broad overview of the current state of the art in fracture mechanics research. Following the Swerdlow Lecture (Structural Problems in Search of Fracture Mechanics Solutions by

Download or read book The Measurement of Crack Length and Shape During Fracture and Fatigue written by C. J. Beevers and published by . This book was released on 1980 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Journal of Testing and Evaluation written by and published by . This book was released on 1985 with total page 462 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book The Influence of Plasticity on Crack Length Measurements Using the Potential Drop Technique written by K. M. Tarnowski and published by . This book was released on 2015 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt: The potential drop (PD) technique is one of the most common methods for determining crack growth; however, other factors can also change the resistance of the specimen, which may erroneously be interpreted as crack extension. In tough, ductile materials, plastic strain can cause a significant change in PD. This paper presents an experimental investigation which quantifies the apparent crack extension due to strain prior to the onset of physical crack growth and considers ways to mitigate it. Compact tension, C(T), and single edge notch tension, SEN(T), specimen geometries are considered with a range of crack lengths. The influence of probe location is also considered. The results identify apparent crack extensions of up to 1.0 mm in the absence of any physical crack extension. This can be reduced through careful selection of probe locations. Appropriate locations are suggested for the geometries considered. It is also shown that high constraint geometry can significantly reduce the influence of plasticity on PD.

Download or read book Corrosion Tests and Standards written by Robert Baboian and published by ASTM International. This book was released on 2005 with total page 887 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurement of Crack Lengths in Compact Tension and Single Edge Notch Specimens Using a New Electrical Potential Calibration written by L. N. MacCartney and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report of NRL Progress written by Naval Research Laboratory (U.S.) and published by . This book was released on 1977 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Localized Damage IV written by Hironobu Nisitani and published by Computational Mechanics. This book was released on 1996 with total page 992 pages. Available in PDF, EPUB and Kindle. Book excerpt: Annotation "This book covers a wide range of topics in localized damage with particular emphasis on recent advances in computational methods. It forms the proceedings of the Fourth International Conference on Localized Damage: Computer-Aided Assessment and Control, which took place on 3-5 June 1996, in Fukuoka, Japan. The Localized Damage conferences are now well-established as the preeminent forum for presentation of the research on advanced computational methods to problems in fracture, fatigue and damage mechanics."--BOOK JACKET. Title Summary field provided by Blackwell North America, Inc. All Rights Reserved.