A Generalized Kinematic Hardening Theory,
ARMY CONSTRUCTION ENGINEERING RESEARCH LAB CHAMPAIGN ILL
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The influence of inelastic behavior of materials ranges from the design of structures to survive earthquake motions to the design of minute machine parts for a specified expected service life. The scope of the present paper is limited to generalizing simple kinematic hardening theory so as to directly attack the question of fatigue life for realistic time-dependent three-dimensional stress states. This new theory of kinematic plastic flow defines an additional physical parameter, the stress hardening coefficient, which services as memory of the previous plastic states. For a specified material, the limiting value of the stress hardening coefficient can be determined from simple one-dimensional fatigue experiments. This limiting value of the stress hardening coefficient directly determines the service life for the material subjected to complex stress states.
- Metallurgy and Metallography
- Solid State Physics