A DAMAGE MODEL INCORPORATING DYNAMIC PLASTIC YIELD SURFACE

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GANJIANI M.

مرکز اطلاعات علمی Scientific Information Database (SID) - Trusted Source for Research and Academic Resources

Journal Paper

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Journal: THE JOURNAL OF COMPUTATIONAL APPLIED MECHANICS Year:2016 | Volume:47 | Issue:1 Page(s): 11-24

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Title

A DAMAGE MODEL INCORPORATING DYNAMIC PLASTIC YIELD SURFACE

Author(s)

GANJIANI M. | Issue Writer Certificate

Keywords

CONTINUUM DAMAGE MECHANICS

DYNAMIC YIELD SURFACE

CONSISTENCY MODEL

GENERALIZED TRAPEZOIDAL ALGORITHM

Abstract

In this paper, a general elastoplastic-damage constitutive model considering the effect of strain rate has been developed. The derivation of this model has been cast into the irreversible thermodynamics with internal variables within thefundamentals of CONTINUUM DAMAGE MECHANICS (CDM). The rate effect has been involved as an additional term intothe plastic yield surface (dynamic plastic yield surface). Therefore, the plastic surface has been presented in thecategory of Consistency– type model in which the rate of state variables is considered as independent state variables. The damage has been assumed as a tensor type variable and based on the energy equivalence hypothesis the damageevolution has been developed. The proposed model has been validated for both rate-independent and rate-dependentdeformation. For this manner, the generalized trapezoidal stress integration algorithm of the model has been explainedand the model has been implemented into user-defined subroutines (UMAT and VUMAT) in the finite elementprogram ABAQUS. The results of numerical simulation, statically and dynamically, have been compared to theexperimental results of three aluminum and two steel alloys. Also, the results of simulation for shear and doublenotchedtests have been compared to their experiments. By comparing the predicted results with experimental data, the capability and validity of the model have been verified.

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APA: Copy

GANJIANI, M.. (2016). A DAMAGE MODEL INCORPORATING DYNAMIC PLASTIC YIELD SURFACE. THE JOURNAL OF COMPUTATIONAL APPLIED MECHANICS, 47(1), 11-24. SID. https://sid.ir/paper/301779/en

Vancouver: Copy

GANJIANI M.. A DAMAGE MODEL INCORPORATING DYNAMIC PLASTIC YIELD SURFACE. THE JOURNAL OF COMPUTATIONAL APPLIED MECHANICS[Internet]. 2016;47(1):11-24. Available from: https://sid.ir/paper/301779/en

IEEE: Copy

M. GANJIANI, “A DAMAGE MODEL INCORPORATING DYNAMIC PLASTIC YIELD SURFACE,” THE JOURNAL OF COMPUTATIONAL APPLIED MECHANICS, vol. 47, no. 1, pp. 11–24, 2016, [Online]. Available: https://sid.ir/paper/301779/en

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