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  1. توسعه برنامه اجزای محدود صریح برای شبیه سازی بتن به کمک مدل ریزصفحه
توسعه برنامه اجزای محدود صریح برای شبیه سازی بتن به کمک مدل ریزصفحه
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توسعه برنامه اجزای محدود صریح برای شبیه سازی بتن به کمک مدل ریزصفحه

شاگردی اسماعیلی، هادی Shagerdi Eamaeeli, Hadi

Implementation of an Explicit Finite Element Program for Simulation of Concrete Behavior Via Microplane Model

Shagerdi Eamaeeli, Hadi | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 42062 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Vafaei, Abolhassan; Shahbeyk, Sharif
  7. Abstract:
  8. In this research study, two constitutive models of improved Microplane are presented. The microplane model M1 is capable of simulation of a brittle aggregate material that undergoes progressive tensile fracturing or damage. It is assumed that the normal stress on a plane of any orientation within the material is a function of only the normal strain on the same microplane. This strain is further assumed to be equal to the resolved component of the macroscopic strain tensor, while the stress on the microplane is not equal to the resolved component of the macroscopic stress tensor. This model also is capable of simulating realistic tensile stress-strain curve with strain-softening and reduction of stresses all the way to zero. The microplane model M4 is a generalized constitutive model for brittle-plastic heterogeneous materials such as concrete. The constitutive law is characterized as a relation between the normal, volumetric, deviatoric, and shear stresses and strains on planes of various orientations, called the microplanes. These types of materials are quasi-brittle and a strain softening has been shown in the zone of stress postpeak. Therefore, using of this model with kinematic constraint makes the results stable in the zone of strain softening. Finally, analysis of implemented finite element model of microplane M4 at three dimensional spaces is considered by using Explicit dynamic analysis. Microplane model M4 by considering the concept of "Stress – strain boundaries" and interaction of normal and shear components on the tension, compression and shear boundaries has the capability of simulation of tensile and compression loading responses in the zone of strain softening
  9. Keywords:
  10. Stress-Strain Boundary ; Finite Element Method ; Strain-Softening Behavior ; Microplane Model ; Explicit Dynamic Analysis ; Improved Microplane Model M4

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