Extension of the Local Strain Fatigue Analysis Concepts to Incorporate Time Dependent Deformation in Titanium(6)-Aluminum(4)-Vanadium at Room Temperature (Fatigue)
Kurath, Peter
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https://hdl.handle.net/2142/71675
Description
Title
Extension of the Local Strain Fatigue Analysis Concepts to Incorporate Time Dependent Deformation in Titanium(6)-Aluminum(4)-Vanadium at Room Temperature (Fatigue)
Author(s)
Kurath, Peter
Issue Date
1984
Department of Study
Theoretical and Applied Mechanics
Discipline
Theoretical and Applied Mechanics
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
Ph.D.
Degree Level
Dissertation
Keyword(s)
Engineering, Materials Science
Abstract
The titanium alloy under investigation, Ti-6Al-4V, displays time dependent deformation at room temperature. This time dependent deformation and the resulting damage are incorporated into the existing framework of the fatigue life prediction methods based upon the local strain approach. This methodology has been developed over the last twenty years to analyze the time independent deformation and damage characteristics of notched members subjected to fatigue loading. Smooth specimens controlled according to the Neuber relation are employed to simulate notch root behavior of members made from the alloy under consideration. Analyses of tests conducted with and without hold times provide estimates of the deformation behavior and fatigue life that are within the usual range of accuracy achieved in the local strain approach.
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