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Early Stages of Fatigue Damage of Fastener Holes Monitored by Laser Speckle / F-P Chiang, M-L Du, S. Li.

Conference Author
Structural Integrity of Fasteners (1992 : Miami, Florida)
Physical Description
1 online resource (12 pages) : illustrations, figures, tables
Additional Creators
Chiang, F-P, Du, M-L, Li, S., American Society for Testing and Materials, and ASTM International
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Summary
The present work confines itself to the study of the initiation and early propagation of fatigue cracks emanating from simulated fastener holes using a laser speckle method that is a noncontact, nondestructive, and remote sensing technique. When illuminated by a narrow laser beam, the fatigue-induced surface roughness causes the laser beam to diffract into a halo modulated by a random speckle pattern. The fatigue damage information is contained in the speckle diffraction pattern. The half width and cross correlation coefficient of a speckle pattern are chosen to quantify this information. Two kinds of specimens, a thin plate with an open hole in the center and a thin plate with an oversized pin impacted into a central hole, were tested. The fatigue process was monitored by the laser speckle patterns. After crack propagation, the specimens were examined under a scanning electron microscope and their fractographic features correlated with the fatigue process.
Dates of Publication and/or Sequential Designation
Volume 1995, Issue 1236 (January 1995)
Subject(s)
Other Subject(s)
ISBN
9780803153004 (e-ISBN)
9780803120174
0803120176
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 14.
Other Forms
Also available online via the World Wide Web. Tables of contents and abstracts freely available; full-text articles available by subscription.
Full text article also available for purchase.
Also available in PDF edition.
Reproduction Note
Electronic reproduction. W. Conshohocken, Pa. : ASTM International, 1995. Mode of access: World Wide Web. System requirements: Web browser. Access may be restricted to users at subscribing institutions.
Technical Details
Mode of access: World Wide Web.
Source of Acquisition
ASTM International PDF Purchase price USD25.
View MARC record | catkey: 27996921