Anisotropic viscoplasticity coupled with anisotropic damage has been modeled in previous works by using the energy equivalence principle appropriately adjusted. Isotropic and kinematic hardenings are present in the viscoplastic part of the model and the evolution equations for the hardening variables incorporate both static and dynamic recovery terms. The main difference to other approaches consists in the formulation of the energy equivalence principle for the plastic stress power and the rate of hardening energy stored in the material. As a practical consequence, a yield function has been established, which depends, besides effective stress variables, on specific functions of damage. The present paper addresses the capabilities of the model in predicting responses of deformation processes with complex specimen geometry. In particular, multiple notched circular specimens and plates with multiple holes under cyclic loading conditions are considered. Comparison of predicted responses with experimental results confirms the convenience of the proposed theory for describing anisotropic damage effects.
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April 2011
Research Papers
Use of a Continuum Damage Model Based on Energy Equivalence to Predict the Response of a Single-Crystal Superalloy
P. Grammenoudis,
P. Grammenoudis
Department of Civil Engineering and Geodesy, Institute of Continuum Mechanics,
Darmstadt University of Technology
, Hochschulstrasse 1, Darmstadt D-64289, Germany
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D. Reckwerth,
D. Reckwerth
Continental Teves AG & Co. oHG
, Guerickestrasse 7, Frankfurt am Main D-60488, Germany
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Ch. Tsakmakis
Ch. Tsakmakis
Department of Civil Engineering and Geodesy, Institute of Continuum Mechanics,
e-mail: tsakmakis@mechanik.tu-darmstadt.de
Darmstadt University of Technology
, Hochschulstrasse 1, Darmstadt D-64289, Germany
Search for other works by this author on:
P. Grammenoudis
Department of Civil Engineering and Geodesy, Institute of Continuum Mechanics,
Darmstadt University of Technology
, Hochschulstrasse 1, Darmstadt D-64289, Germany
D. Reckwerth
Continental Teves AG & Co. oHG
, Guerickestrasse 7, Frankfurt am Main D-60488, Germany
Ch. Tsakmakis
Department of Civil Engineering and Geodesy, Institute of Continuum Mechanics,
Darmstadt University of Technology
, Hochschulstrasse 1, Darmstadt D-64289, Germanye-mail: tsakmakis@mechanik.tu-darmstadt.de
J. Eng. Mater. Technol. Apr 2011, 133(2): 021001 (7 pages)
Published Online: March 3, 2011
Article history
Received:
May 5, 2008
Revised:
July 21, 2009
Online:
March 3, 2011
Published:
March 3, 2011
Citation
Grammenoudis, P., Reckwerth, D., and Tsakmakis, C. (March 3, 2011). "Use of a Continuum Damage Model Based on Energy Equivalence to Predict the Response of a Single-Crystal Superalloy." ASME. J. Eng. Mater. Technol. April 2011; 133(2): 021001. https://doi.org/10.1115/1.4000666
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