Author: Frank O. ReedPublisher:
ISBN:
Category : Bridges, Iron and steel
Languages : en
Pages : 56
Book Description
Development of Ultrasonic Techniques to Establish Flaw Size
Author: Frank O. ReedPublisher:
ISBN:
Category : Bridges, Iron and steel
Languages : en
Pages : 56
Book Description
Investigation of Methods for Determining Actual Flaw Size in Materials by Non-destructive Ultrasonic Techniques
Author: G. R. POSAKONYPublisher:
ISBN:
Category : Nondestructive testing
Languages : en
Pages : 57
Book Description
Development of Ultrasonic Techniques for Defect Evaluation
Author: J. B. RamseyPublisher:
ISBN:
Category : Metals
Languages : en
Pages : 158
Book Description
The results of investigations to determine the effects of several metallurgical and acoustical variables on the ultrasonic signal strength using commercially available ultrasonic flaw detection equipment are reported. Applied to various metals used in aerospace structures and components, these investigations resulted in the separation and determination of important acoustical properties that were expected to indicate the cause for differences in the trans mission of ultrasonic energy in the various materials. A method was developed for applying correction factors to test blocks of one metal in order to estimate the size of defects in other metals. Beam collimation techniques were studied to determine optimum conditions for detecting defects and displaying them on both cathode ray image and C-Scan (plan view) facsimile paper recordings. Some investigations were also performed to separate and identify shear and surface (Rayleigh) waves.
Investigation of Methods for Determining Actual Flaw Size in Materials by Nondestructive Ultrasonic Means
Author: Leo J. AndersonPublisher:
ISBN:
Category : Metals
Languages : en
Pages : 84
Book Description
The work effort under Contract AF 33(616)-7279 was directed toward the development and evaluation of techniques for determining actual flaw size, orientation geometry in materials by nondestructive ultrasonic means. The program led to the development of a breadboard instrument capable of presenting an isometric, three0-dimensional projection of inconsistencies in metal parts. The three dimensional display of the material was achieved by the design of a special mechanical manipulator and presentation system employing a single oscillating transducer. With the theory and practicality thus demonstrated, attention to refinements to increase the inspection rate an imporve information display for in-process viewing and permanent recording was undertaken which led to the development of a fully operational self-contained nondestructive testing instrument. This new instrument represents a new technology using sound beam properties in materials as operating parameters to produce an isometric presentation on a cathode ray tube. The end result is an operational instrument capable of rapid scan rates and a multi-purpose display system for setup, analysis by in-process viewing, and flaw are localization.
Ultrasonic Nondestructive Evaluation Systems
Author: Lester W. Schmerr JrPublisher: Springer Science & Business Media
ISBN: 0387490639
Category : Technology & Engineering
Languages : en
Pages : 602
Book Description
Using a systems level approach, this book employs aspects of linear systems theory and wave propagation and scattering theory to develop a comprehensive model of an entire ultrasonic measurement system. This integrated approach leads to a new model-based engineering technology for designing, using and optimizing ultrasonic nondestructive evaluation inspections. In addition, the book incorporates MATLAB examples and exercises.
Scientific and Technical Aerospace Reports
Author: Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 1028
Book Description
Lists citations with abstracts for aerospace related reports obtained from world wide sources and announces documents that have recently been entered into the NASA Scientific and Technical Information Database.
Development of a Multi-Beam Laser Ultrasonic Inspection System and Its Application on Flaw Sizing
Author: Publisher: Contentsworks Inc.
ISBN: 4862163351
Category :
Languages : en
Pages : 25
Book Description
Determination of Actual Flaw Size in Materials by Ultrasonic Techniques
Author: E. DUGGERStudy on the Ultrasonic Flaw Size Estimation by the Scanning Method with Relative Threshold
Author: UDO. SCHLENGERMANNPublisher:
ISBN:
Category :
Languages : en
Pages : 7
Book Description
THE DETERMINATION OF THE SHAPE AND THE SIZE OF A DISCONTINUITY HAS BECOME DECISIVE IN THE ASSESSMENT OF THE ACCEPTABILITY OF A PRODUCT. WITHIN ULTRASONIC TECHNIQUES THERE ARE DIFFERENT METHODS AVAILABLE FOR THIS PURPOSE. AS THE DGS METHOD IS OPERATING WITH THE IDEALIZED SHAPE OF A CIRCULAR REFLECTOR AND THEREFORE DOES NOT INDICATE THE TRUE TARGET AREA BUT AN EQUIVALENT FLAW SIZE, IN SPECIAL CASES ONE TRIES TO RE-ESTABLISH THE OLD METHOD OF FLAW CONTOUR SCANNING (GO-AROUND -METHOD), THOUGH ORIGINALLY IT WAS USED FOR LARGE TARGETS ONLY. FOR THE FLAW CONTOUR SCANNING METHOD UNTIL NOW, THEORETICAL STATEMENTS HAVE BEEN MADE ONLY IN THE FAR FIELD AND ONLY FOR SMALL REFLECTORS. IN PRACTICE MOSTLY OTHER CONDITIONS ARE MET WITH, HOWEVER. THEREFORE THE LIMITS FOR THE USABILITY OF THIS METHOD (WITH RELATIVE THRESHOLD) HAVE BEEN DETERMINED BY EXPERIMENTAL STUDIES, AND THE RESPECTIVE CONCLUSIONS ARE DRAWN FOR MATERIAL TESTING BY ULTRASOUND.
A Review of the Air Force Materials Research and Development Program
Author: United States. Wright Air Development DivisionPublisher:
ISBN:
Category : Materials
Languages : en
Pages : 212
Book Description