Email RIS file
Bookmark
Report an Issue

In-situ Fatigue Damage Investigations in Welded Metallic Components by Infrared Techniques / Justus Medgenberg, Thomas Ummenhofer

Conference Author
Seventh International ASTM/ESIS Symposium on Fatigue and Fracture Mechanics (36th ASTM National Symposium on Fatigue and Fracture Mechanics) (7th : 2007 : Tampa, FL)
Physical Description
1 online resource (24 pages) : illustrations, figures, tables
Additional Creators
Ummenhofer, Thomas, Medgenberg, Justus, American Society for Testing and Materials, and ASTM International
Access Online

Availability

I Want It
I Want It

Finding items...

Restrictions on Access
Subscription required for access to full text.
License restrictions may limit access.
Summary
The paper reviews the state of the art of thermal damage assessment in metals and proposes a specialized form of lock-in thermography as an efficient tool for the quantification of early fatigue damage phenomena in welded steel structures in the regime of mid- to high-cycle fatigue. It can be proved that advanced thermographic techniques are sensitive to early damage phenomena in the weld toe. They provide a new experimental mean for in-situ investigation of early inhomogeneous fatigue damage phenomena as mesoplasticity and fatigue cracks. The results demonstrate that noncontacting full field temperature measurements using highly sensitive infrared technology can be applied successfully to detect localized fatigue damage at around 10 % to 20 % of the total fatigue lifetime of the tested specimens. The applied method is based on the separation of thermoelastic and thermoplastic temperature effects which cause characteristic local temperature signatures. In contrast to other well-known approaches¿̐ưas, e.g., measuring the rise of mean temperature during fatigue loading¿̐ưthe applied method offers a very high spatial resolution and resolves extremely localized phenomena. The methodology can be applied to monitor the fatigue process during conventional fatigue testing. The additional effort for the specimen preparation and the installation of the testing setup is minimal.
Dates of Publication and/or Sequential Designation
Volume 2009, Issue 1508 (January 2009)
Subject(s)
Other Subject(s)
ISBN
9780803169999 (e-ISBN)
9780803134164
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 48.
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, 2009. 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: 28010029