About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Discovery of a Reciprocal Relationship in Fatigue between Stress-life (S-N) Behavior and Fatigue Crack Growth Behavior |
Author(s) |
K. S. Ravi Chandran |
On-Site Speaker (Planned) |
K. S. Ravi Chandran |
Abstract Scope |
The discovery of a reciprocal relationship between the stress-life (S-N) behavior (or curve) and fatigue crack growth behavior (or curve) is presented. This relationship is simple, mathematically symmetric and has been developed from the author’s physical model of S-N fatigue behavior through heuristic arguments. Remarkably, the reciprocal relationship allows the direct conversion of S-N curve into FCG curve and vice-versa. This is shown to be valid for cyclic fatigue of metals, ceramics and polymers. What this means is that the fatigue crack growth data determined from one fracture mechanics specimen would allow the construction of the S-N data without time consuming multi-specimen S-N fatigue testing. Extensive experimental fatigue data of metals, ceramics and polymers have been used to demonstrate the validity of this relationship. The relationship cannot be framed from the crack-centric fracture-mechanics. Rather, the net-section-centric approach leads to a more powerful way of characterizing fatigue behavior of materials. |
Proceedings Inclusion? |
Planned: |
Keywords |
Mechanical Properties, Modeling and Simulation, Other |