Dissertation > Excellent graduate degree dissertation topics show

Numerical Simulation on Ductile Farcture Considering Micro-Plastic Damage

Author: ZhangKai
Tutor: JingHongYang
School: Tianjin University
Course: Materials Processing Engineering
Keywords: X65 steel Plastic damage Ductile fracture Three-point bending Numerical Simulation
CLC: TB301
Type: Master's thesis
Year: 2005
Downloads: 364
Quote: 0
Read: Download Dissertation

Abstract


Widely used in the production and life of steel components, steel structure increasingly large-scale, highly fortified complex structure and rigors of the use of the environment, so that the security problem has been widespread concern. On the other hand, in the actual use of the steel structure process and to maximize the potential of the material, you can save a lot of money and human resources. Therefore, not only has a theoretical value for ductile fracture, no doubt also has potentially huge economic benefits. With the development of metallurgy and metallurgical technologies to improve the toughness of the material gradually enhanced material failure studies focus will shift from brittle fracture of the material to ductile fracture up. From the fifties and sixties of the last century, at home and abroad from the mechanics, metallurgy and so many aspects of plastic deformation and ductile fracture toughness materials extensive and in-depth studies have proposed many models, and achieved fruitful results. Currently the most widely used, the theory is more ductile fracture model Gurson in 1975, after a revised and improved by Tvergaard porous microscopic mechanism model (GT model), the model quantitatively describes the amount of plastic deformation and hole expansion relationship. Into the next decade, with the application and development of computer technology, GT model in the numerical study of ductile fracture and new applications. Actual ductile materials containing plastic damage in the hosting process will correctly describe the microscopic plastic damage material properties and ductile fracture process, security, and reliability for the evaluation of the quality of the material, will be of great theoretical and practical significance. In this study, using X65 Pipeline as experimental materials, its uniaxial tensile test and three-point bending experiments; consider plastic damage inside the material basis, by the finite element method (used in this study is a special unit model method), the preparation of solving program ductile fracture characteristic parameters, the simulation of the materials ductile fracture process, obtained by the standard three-point bending specimen resistance curve test results reflect the material microstructure damage control parameters, according to the parameters of the same material. uniaxial tensile test for quantitative prediction, that predict the experimental results of the same material, from the results of an experimental analysis of the crack-tip stress field distribution of the three-point bend specimens. The results show that a special unit to consider plastic damage in toughness, crack propagation model can well describe the the material ductile fracture process and the realization of the same material in different experimental forecast.

Related Dissertations

  1. The Setting Bases of Working Pressure in LNG Systems and Orthogonal Experiment Design of Heat Exchangers,TQ051.5
  2. Study on Springback of High-Strength Steel Stamping,TG386
  3. Numerical Simulation and Experiment on Hydroforming of Cups with Controllable Radial Pressure,TG386
  4. Research on Technology and Mechanism of Joining Cemented Carbide to Carbon Steel,TG454
  5. Numerical Simulation of Film Cooling in Turbine Cascade with Non-Axisymmetric Endwall Method,V231.3
  6. High Speed Aerodynamic Convection and Coupled Heat Transfer of Complicated Bodies,V215.4
  7. The Analysis on Characteris of Vibration Source about Vertical Vibration of Surrounding Environment Induced by Rail Transit,U211.3
  8. Study on the Heat Transfer Characteristics of Particle Cluster in Circulating Fluidized Bed,TK124
  9. Numerical Simulation of SNCR Process of a 600MW Utility Boiler,TK222
  10. Numerical Simulation of Biomass Direct Reburning,TK16
  11. Numerical Simulation on Pulverized Coal Combustion Process in a 670T/H Tangential Firing Furnace,TK224.11
  12. Numerical Simulation on the Combustion Process in the Furnace of a 1000MW Lignite-Fired USC Boiler,TK224.11
  13. Study on Gas-Solid Two-Phase Flow in Spouted Beds,TK173
  14. Experimental Study and Numerical Simulation on Aerodynamic Field of Tangential Bias Swirl Burner,TK223.23
  15. Characteristic Study of Combustion in Central Reverse Flame Chamber,TK223.21
  16. Numerical Simulation and Contrastive Analysis of Labyrinth Seals and Leaf Seals,TK263.2
  17. Numerical Study on Phosphorus Distribution in Water Environment of the Three Gorges Reservoir,X832
  18. The Design and Performance Simulation of External Valve Small Displacement Pump,TE933.3
  19. Analysis of the Impact of Tailings Dam Stability under Seepage Role,TV649
  20. Study on Hydraulic Fracturing of Low Permeability Reservoir,P618.13
  21. Numerical Simulation and Experimental Study of Air-Assisted Sprayer of Orchard,S491

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > General issues of engineering materials > Engineering Mechanics of Materials ( material strength of Science)
© 2012 www.DissertationTopic.Net  Mobile