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The incorporation of yield surface distortion into a unified constitutive model, part 2: Predictive capabilities

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Summary

The MATMOD-4V-DISTORTION model has been derived [1] with the intent of improving the MATMOD-4V model by adding the capability to predict “distortions” of small strain offset yield surfaces. This model is compared against a variety of experimental data to verify its behavior. Model simulations are compared with experimental data for proportional and nonproportional prestress histories and the effect of yield definition is also investigated. Finally, the same model which predicts a flattening of the yield surface in\(\sigma - \sqrt 3 {\mathbf{ }}\tau \) space is used to predict a rotation of the yield surface in σ1-σ2 coordinates.

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References

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Authors and Affiliations

  1. Technical Support Div.-EDSG, Hughes Aircraft Co., P.O. Box 902, 90245, El Segundo, CA, USA

    D. E. Helling (Formerly Graduate Research Assistant)

  2. Dept. Mater. Sci. and Engg., Stanford University, 94305, Stanford, CA, USA

    A. K. Miller

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  1. D. E. Helling
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  2. A. K. Miller
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Helling, D.E., Miller, A.K. The incorporation of yield surface distortion into a unified constitutive model, part 2: Predictive capabilities. Acta Mechanica 72, 39–53 (1988). https://doi.org/10.1007/BF01176542

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