Mechanisms of Fatigue Damage in Boron/Aluminum Composites / WS. Johnson
- Conference Author
- Damage in Composite Materials: Basic Mechanisms, Accumulation, Tolerance, and Characterization (1980 : Bal Harbour, Fla)
- Physical Description
- 1 online resource (20 pages) : illustrations, figures, tables
- Additional Creators
- Johnson, WS., American Society for Testing and Materials, and ASTM International
Access Online
- Restrictions on Access
- Subscription required for access to full text.
License restrictions may limit access. - Summary
- Fatigue damage mechanisms have been investigated using a series of tension fatigue tests on several laminates of boron/aluminum (6061-0). This study focuses on four aspects of the fatigue response. First, in laminates with 0-deg fibers on the outside, an analysis that identifies ¿̐ưshakedown¿̐ư conditions is shown to predict the stress amplitude below which no fatigue damage accumulates. Second, a simple fatigue damage accumulation model which relates matrix fatigue cracking and the overall laminate properties is described. A model for the saturation damage stage development is presented. Third, data illustrate that identical laminates, tested in directions 90-deg apart (such that one layup has 90-deg outer plies and the other 0-deg), have different fatigue behaviors due to the stacking sequence. The 90-deg plies on the surface develop cracks earlier than predicted by shakedown. An attempt is made to explain this stacking sequence effect. Finally, variable load history effects on the fatigue damage response are investigated by simple tests. These tests reveal that for a given stress ratio the specimen seeks the saturation damage state for the largest stress range to which it is subjected. It also was found that little damage is generated by shifting a given stress range down, whereas significant damage may be created by shifting it upward.
- Dates of Publication and/or Sequential Designation
- Volume 1982, Issue 775 (January 1982)
- Subject(s)
- Other Subject(s)
- ISBN
- 9780803148406 (e-ISBN)
9780803106963
0803106963 - Digital File Characteristics
- text file PDF
- Bibliography Note
- Includes bibliographical references 27.
- 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, 1982. 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: 28000353