INVESTIGATION ON SEMI-IMPLICIT INTEGRATION METHOD BASED ON EXPONENTIAL MAP FOR VON-MISES PLASTICITY MODEL WITH LINEAR MIXED HARDENING

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HAJI AGHAJANPOUR NADER; SHARIFIAN MEHRZAD

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

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 163-169

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Title

INVESTIGATION ON SEMI-IMPLICIT INTEGRATION METHOD BASED ON EXPONENTIAL MAP FOR VON-MISES PLASTICITY MODEL WITH LINEAR MIXED HARDENING

Author(s)

HAJI AGHAJANPOUR NADER | SHARIFIAN MEHRZAD | Issue Writer Certificate

Keywords

INTEGRATIONQ1

EXPONENTIAL MAPQ1

VON-MISES PLASTICITYQ1

LINEAR HARDENINGQ1

Abstract

In the nonlinear elastoplastic finite element analysis, the stresses must be updated at each Gauss point of the elements in each iteration of each load increment by a stress-updating process. The stress-updating process is performed by INTEGRATION of the constitutive equations in plasticity. It should be noted that the accuracy of integrating the constitutive equations significantly affects the accuracy of the final results of the structural analysis. In this study, the VON-MISES PLASTICITY model along with the isotropic and kinematic hardening mechanisms is considered in the small strain realm. The constitutive equations are converted to a nonlinear equation system in an augmented stress space. The aforementioned nonlinear equation system is solved by a semi implicit technique. The precision of the solution is dependent on the radius of the yield surface which is used in the process of the solution. Therefore, the relations are derived so that the yield surface radius can be picked up from each arbitrary part of plasticity step. Finally, to determine the best time of loading step for calculating the radius of the yield surface, a wide range of numerical tests is performed.

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APA: Copy

HAJI AGHAJANPOUR, NADER, & SHARIFIAN, MEHRZAD. (2016). INVESTIGATION ON SEMI-IMPLICIT INTEGRATION METHOD BASED ON EXPONENTIAL MAP FOR VON-MISES PLASTICITY MODEL WITH LINEAR MIXED HARDENING. MODARES MECHANICAL ENGINEERING, 16(7), 163-169. SID. https://sid.ir/paper/178327/en

Vancouver: Copy

HAJI AGHAJANPOUR NADER, SHARIFIAN MEHRZAD. INVESTIGATION ON SEMI-IMPLICIT INTEGRATION METHOD BASED ON EXPONENTIAL MAP FOR VON-MISES PLASTICITY MODEL WITH LINEAR MIXED HARDENING. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):163-169. Available from: https://sid.ir/paper/178327/en

IEEE: Copy

NADER HAJI AGHAJANPOUR, and MEHRZAD SHARIFIAN, “INVESTIGATION ON SEMI-IMPLICIT INTEGRATION METHOD BASED ON EXPONENTIAL MAP FOR VON-MISES PLASTICITY MODEL WITH LINEAR MIXED HARDENING,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 163–169, 2016, [Online]. Available: https://sid.ir/paper/178327/en

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