A New Approach to Improve Material Models
Source abstract
Abstract
The inelastic behavior of materials is described most efficiently by unified models when their material functions are determined so that flow, hardening, creep etc. will be covered correctly. In this paper, the adaptation of a model is not confined to finding the optimal material parameters but is extended to the identification of the optimal shape of the material functions itself. Material functions given by series of simple shape functions defined in discrete sections which merge smoothly together lead to the best adaptation to experimental results. Furthermore, any remaining shortcomings of the model reveal deficiencies in the modelling of the microphysics of the material. Then by careful interpretation of the uncovered physical properties the original material model has to be amended leading to the derivation of even entirely new models. Thus, a powerful tool is presented here by which a unified model can be checked and improved.
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Research context
OpenAlex topics: Material Properties and Failure Mechanisms · Soil, Finite Element Methods · High-Velocity Impact and Material Behavior
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institut fu¨r Statik, TU Braunschweig, 38106 Braunschweig, Germany
References (9)
Show source-provided references
1. Braasch, H., 1992, “Ein Konzept zur Fortentwicklung und Anwendung viskoplastischer Werkstoffmodelle, (A Concept for the Further Development and the Application of Visco-Plastic Material Models),” PhD thesis, TU Braunschweig.
2. Braasch, H., and Estrin, Y., 1993, “Parameter Identification for a Two-internal-Variable Constitutive Model Using the Evolution Strategy,” Bertram, L. A., Brown, S. B., and Freed, A. D., eds., Material Parameter Estimation for Modern Constitutive Equations, ASME, pp. 47–56.
3. Bruhns, O. T., White, P. S., Chaboche, J. L., and Eikhoff, J. V. D., 1988, “Constitutive Modeling in the Range of Inelastic Deformations,” EUR 17999.
4. Chaboche J. L. , and NouailhasD., 1989, “A Unified Constitutive Model for Cyclic Viscoplasticity and its Applications to Various Stainless Steels,” ASME JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY, Vol. 111, pp. 424–430.10.1115/1.3226490 ↗
5. Chaboche J. L. , and RousselierG., 1983, “On the Plastic and Viscoplastic Constitutive Equations,” ASME Journal of Pressure Vessel Technology, Vol. 105, pp. 153–164.10.1115/1.3264257 ↗
6. Estrin Y., 1990, “Strain Hardening and Creep Behavior of Material Containing Nonshearable Second-Phase Particles,” Gefu¨ge und Mechanische Eigenschaften von Werkstoffen, DGM.
7. Mu¨ller D. , and HartmannG., 1989, “Identification of Materials Parameters for Inelastic Constitutive Models Using Principles of Biologic Evolution,” ASME JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY, Vol. 111, pp. 299–305.10.1115/1.3226470 ↗
8. Nouailhas, D., 1987, “Viscoplastic Modelling Applied to Stainless Steel Behavior,” Proc. of the Second International Conference on Constitutive Laws for Engineering Materials: Theory and Applications.
9. Robinson, D. N., and Bartolotta, P. A., 1985, “Viscoplastic Constitutive Relationships with Dependence on Thermomechanical History,” NASA Report CR-174835.