High temperature biaxial ratchetting under complex loading history
Book
·
OSTI ID:131864
- Univ. of Tokyo (Japan). Dept. of Mechanical Engineering
A loading history effect on biaxial mechanical ratchetting under the interaction of creep and plasticity has been experimentally investigated with modified 9Cr-1Mo steel. The experiments were conducted at 873K under the biaxial loading of a steady torsional shear stress superposing upon a cyclic push-pull straining. In the first series of experiments it has been found that the slower cyclic straining and/or the larger steady shear stress result in the larger accumulation of ratchet strain. The second series of experiments includes changes in the cyclic strain rate and the ``steady`` shear stress to investigate the loading history effect. Simple empirical equations were derived. Additional analysis has been done with inelastic constitutive equations of creep plasticity superposition type and Chaboche type.
- OSTI ID:
- 131864
- Report Number(s):
- CONF-950740--; ISBN 0-7918-1334-7
- Country of Publication:
- United States
- Language:
- English
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