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Damage Growth Rate Calculations Realized in Whole Process with Two Kinks of Methods

American Journal of Science and Technology
Vol.2 , No. 4, Publication Date: Jun. 2, 2015, Page: 146-164

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Authors

[1]	Yan Gui Yu, Zhejiang Guangxin New Technology Application Academy of Electromechanical and Chemical Engineering, Hangzhou, China.

Abstract

Based on author’s the new viewpoints who he thinks there are the genetic principles and clone technologies in the mechanics and the engineering fields; In view of micro-damage and macro-damage behaviors there are distinctly different; To use the theoretical approach, and adopt the simple stress-parameter, or the strain-parameter-method and the multiplication-method of two-parameters, to establish numerous new calculation models in whole damage growth process for elastic-plastic steels, which are the micro damage and macro growth driving forces, the damage growth rate equations for different stages, the damage-growth-rate-linking-equation in whole process; For the transitional point damage value and the damage growth rate at transitional point from micro damage to macro damage growth respectively to put forward a lot of expressions, to provide the concrete and detailed calculation process, the steps and the methods; For new discovering and there are functional relations of some key materials parameters, respectively to give the new calculable formulas, the new definitions, the new physical and geometrical meanings for them. Thereby make linking and communication for among the modern damage mechanics, the fracture mechanics and the traditional material mechanics; to realize calculations for the damage growth rate and lifetime prediction in whole process.

Keywords

Micro and Macro Damage Growth, Damage Rate Modeling in Whole Process, Simple Stress or Strain Parameter Method, Multiplication-Method of Two-Parameters, Elastic-Plastic Materials

Reference

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