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Fatigue Crack Propagation under Complex Loading in Arbitrary 2D Geometries / ACO Miranda, MA. Meggiolaro, JTP Castro, LF. Martha, TN. Bittencourt

Conference Author
Applications of Automation Technology in Fatigue and Fracture Testing and Analysis: Fourth Volume (4th : (2000 : Orlando, FL)
Physical Description
1 online resource (26 pages) : illustrations, figures, tables
Additional Creators
Miranda, ACO, Bittencourt, TN., Castro, JTP, Martha, LF., Meggiolaro, MA., American Society for Testing and Materials, and ASTM International
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Summary
A reliable and cost effective two-phase methodology is proposed and implemented in two pieces of software to predict fatigue crack propagation in generic two-dimensional structural components under complex loading. First, the fatigue crack path and its stress intensity factor are calculated in a specialized finite-element software, using small crack increments. At each crack propagation step, the mesh is automatically redefined based on a self-adaptive strategy that takes into account the estimation of the previous step stress analysis numerical errors. Numerical methods are used to calculate the crack propagation path, based on the computation of the crack incremental direction, and the stress-intensity factors KI, from the finite element response. An application example presents a comparison between numerical simulation results and those measured in physical experiments. Then, an analytical expression is adjusted to the calculated KI(a) values, where a is the length along the crack path. This KI(a) expression is used as an input to a powerful general purpose fatigue design software based in the local approach, developed to predict both initiation and propagation fatigue lives under complex loading by all classical design methods, including the S-N, the ?-N and the IIW (for welded structures) to deal with crack initiation, and the da/dN to treat propagation problems. In particular, its crack propagation module accepts any KI expression and any da/dN rule, using a ?Krms or a cycle-by-cycle propagation method to deal with one and two-dimensional crack propagation under complex loading. If requested, this latter method may include overload-induced crack retardation effects.
Dates of Publication and/or Sequential Designation
Volume 2002, Issue 1411 (January 2002)
Subject(s)
Other Subject(s)
ISBN
9780803154629 (e-ISBN)
9780803128903
0803128908
Digital File Characteristics
text file PDF
Bibliography Note
Includes bibliographical references 39.
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, 2002. 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.
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