Inversion of Masing models via continuous Iwan systems.
It is shown that for any material or structural model expressible as a Masing model, there exists a unique parallel-series (displacement-based) Iwan system that characterizes that model as a function of displacement history. This poses advantages both in terms of more convenient force evaluation in arbitrary deformation histories as well as in terms of model inversion. Characterization as an Iwan system is demonstrated through the inversion of the Ramberg-Osgood model, a force(stress)-based material model that is not explicitly invertible. An implication of the inversion process is that direct, rigorous comparisons of different Masing models, regardless of the ability to invert their constitutive relationship, can be achieved through the comparison of their associated Iwan distribution densities.
- Research Organization:
- Sandia National Laboratories
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- AC04-94AL85000
- OSTI ID:
- 961639
- Report Number(s):
- SAND2004-3914J
- Journal Information:
- Proposed for publication in the Journal of Nonlinear Mechanics., Journal Name: Proposed for publication in the Journal of Nonlinear Mechanics. Journal Issue: 1 Vol. 43
- Country of Publication:
- United States
- Language:
- English
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