Development of a unified viscoplasticity constitutive model based on classical plasticity theory |
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Authors: | Ping Guan ChangChun Liu HeXiang Lü |
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Affiliation: | (1) College of Architectural Engineering, Dalian University, Dalian, 116622, China;(2) State Key Laboratory of Structural Analysis for Industrial Equipment, Dalian University of Technology, Dalian, 116024, China |
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Abstract: | The traditional unified viscoplasticity constitutive model can be only applied to metal materials. The study of the unified
constitutive theory for metal materials has discovered the correlation between the classical plasticity theory and the unified
viscoplasticity constitutive model, thus leading to the concepts of the classic plastic potential and yield surface in the
unified constitutive model. Moreover, this research has given the continuous expression of the classical plastic multiplier
and presented the corresponding constructive method, which extends its physical significance and lays down a good foundation
for the application of the unified constitutive theory to the material analysis in more fields. This paper also introduces
the unified constitutive model for metal materials and geo-materials. The numerical simulation indicates that the construction
should be both reasonable and practical.
Supported by the National Natural Science Foundation of China (Grant No. 90410012) |
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Keywords: | viscoplasticity classical plasticity unified constitutive model plastic potential yield surface |
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