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Plastic Analysis of a Plate Containing an Edge Notch and a Piezoelectric Patch

Ghandriz, Rojin | 2010

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  1. Type of Document: M.Sc. Thesis
  2. Language: English
  3. Document No: 41053 (53)
  4. University: Sharif University of Technology, International Campus, Kish Island
  5. Department: Science and Engineering
  6. Advisor(s): Mohammadi Shoja, Hossein
  7. Abstract:
  8. In this project the goal is to study where, when and how the cracks in the steel connection plate between beam and column initiate and how far would the crack grow before failure and how to detect crack initiation by utilizing piezoelectric sensors. In this analysis piezoelectric is placed in line of crack propagation for sensing strain and changing it to voltage. A thin plate with edge notch which is an ideal model of typical beam to column connection is assumed. The plate is subjected to a uniaxial uniform load. With the aid of ANSYS software, the plate is analyzed in both elastic and plastic stages. The strain-stress curve with kinematic hardening part is considered and modeled with multi-linear method. The micromechanical based theory, so-called “Stress Modified Critical Strain” (SMCS) model is utilized for prediction of ductile crack initiation. Based on the combined effects of the triaxiality and plastic strain, the model can capture the void growth phenomenon in steel material. The triaxiality and plastic strain for several load levels are obtained. The SMCS criterion corresponding to each load is calculated and the crack status is determined
  9. Keywords:
  10. Refraction ; Plastic Analysis ; Piezoelectric Sensor ; Kinematics Hardening ; Crack Initiation ; Stress Modified Critical Strain (SMCS)

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