The Life Predicting Calculations in Whole Process Realized from Micro to Macro Damage with Conventional Materials Constants

American Journal of Science and Technology

YanguiYu¹ 

[1] Zhejiang Guangxin New Technology Application Academy of Electromechanical and Chemical Engineering, floor13, East Edifice, International Garden Tiannushan Road 160, Hangzhou 310007, China.

关键词: Elastic-Plastic Materials;    Cyclic Loading;    Fatigue Damage;    Damage Growth;    Damage Modeling;    Fatigue Life Prediction;   

学科分类：工程和技术（综合）

来源: AASCIT

【 摘 要 】

Based on researching and analyzing data by references, to study their compositions of various traditional mathematical models and modern models, to use the theoretical approach, especially to be the similar to “genetic elements” and “clone technology” in life science, by means of the conventional and the modern material constants, thereby have made up the calculating figure1 of material behaviors. For elastic-plastic steels containing pre-micro or pre-macro-flaws, to adopt the multiplication method of two parameters σ∙ε in micro damage process, the multiplication method of two parameters K_1^'∙δ_t^' in macro damage process, along with the program calculations of computer, so that to discover and establish lot of new calculation models from micro to macro and even all damage growth process, which are the equations of the driving forces and the various life predicting calculations. In addition, to propose yet many calculating expressions and calculating methods under different loading conditions, to define their physical and geometrical meanings for key parameters, to explain in detail the conversion methods between the damage variable D and the crack variable , between corresponding the dimensions-units and ones, which are relevant parameters in the damage mechanics and the fracture mechanics. Also to expound concretely the calculation methods and the processes for transition damage value D_tr between two stages from the micro to macro damage growth process. The purpose is to try to make the modern fatigue-damage discipline nowadays depends on tests become gradually calculable subject as the conventional material mechanics, such that will be having practical significances for saving testing manpower and funds, for promoting applying and development relevant disciplines.

【 授权许可】

Unknown