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American Journal of Materials Research

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Life Predictions Based on Calculable Materials Constants from Micro to Macro Fatigue Damage Processes

American Journal of Materials Research
Vol.1 , No. 4, Publication Date: Oct. 24, 2014, Page: 59-73

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Authors

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

Abstract

To use the theoretical approach, by means of the traditional and the modern material constants; study their compositions of conventional mathematical models and modern models; research damage growth behaviors for some steels containing pre-micro or pre-macro-flaws; thereby discover and establish lot of new calculation models in all damage growth process, which are the equations of the driving forces and the various life predictions. In addition, propose yet many calculating expressions under different loading conditions. For key parameters inside formulas, define their physical and geometrical meanings. For relationship between the damage variable D and the crack variable a, between the dimensions-units and ones inside different equations, explain in detail the conversion methods. For the transition damage value D_tr from micro to macro damage growth process, expound concretely the calculation processes. The purpose is to try to make the modern fatigue-damage discipline become a calculable subject as the conventional material mechanics, such that will be having practical significances for promoting applying and development for relevant disciplines.

Keywords

Elastic-Plastic Materials, Damage Modeling, Fatigue Damage Parameter, Low Cycle Fatigue, High Cycle Fatigue, Lifetime Prediction

Reference

[01]	Yu Yangui, Sun Yiming, MaYanghui and XuFeng. The Computing of intersecting relations for its Strength Problem on Damage and Fracture to Materials with short and long crack. 2011); In: International Scholarly Research Network ISRN. Mechanical Engineering Volume, Article ID 876396. http://www.hindawi.com/isrn/me/.
[02]	Yangui Yu. The Calculations of Evolving Rates Realized with Two of Type Variables in Whole Process for Elastic-Plastic Materials Behaviors under Unsymmetrical Cycle. Mechanical Engineering Research. Canadian Center of Science and Education 2012; 2. (2):77-87; ISSN 1927-0607(print) E-ISSN 1927-0615 (Online).
[03]	Yu Yangui, Xu Feng, Studies and Application of Calculation Methods on Small Crack Growth Behaviors for Elastic-plastic Materials, Chinese Journal of Mechanical Engineering, 43, (12), 240-245. (2007), (in Chinese).
[04]	YU Yangui, LIU Xiang, ZHANG Chang sheng and TAN Yanhua. Fatigue damage calculated by Ratio-Method Metallic Material with small crack under un-symmetric Cyclic Loading, Chinese Journal of Mechanical Engineering, 19, (2), 312-316, (2006).
[05]	YU Yangui. Fatigue Damage Calculated by the Ratio-Method to Materials and Its Machine Parts, Chinese Journal of Aeronautics, 16, (3) 157-161, (2003).
[06]	YuYangui and LIU Xiang. Studies and Applications of three Kinds of Calculation Methods by Describing Damage Evolving Behaviors for Elastic-Plastic Materials, Chinese Journal of Aeronautics, 19, (1), 52-58,(2006).
[07]	Yangui Yu, Several kinds of Calculation Methods on the Crack growth Rates for Elastic-Plastic Steels. In: 13th International Conference on fracture (ICF13), (Beijing, 2013) In CD, ID S17-045
[08]	Morrow, j. D. Fatigue Design handbook, Section 3.2, SAE Advances in Engineering, Society for Automotive Engineers, (Warrendale, PA, 1968), Vol. 4, pp. 21-29.
[09]	Y. Murakami, S. Sarada, T. Endo. H. Tani-ishi, Correlations among Growth Law of Small Crack, Low-Cycle Fatigue Law and ,Applicability of Miner’s Rule, Engineering Fracture Mechanics, 18, (5) 909-924, (1983).
[10]	S. V. Doronin, et al., Ed. RAN U. E. Soken, Models on the fracture and the strength on technology systems for carry structures, (Novosirsk Science, 2005) , PP. 160-165. (in Russian).
[11]	S. Ya. Yaliema, Correction about Paris’s equation and cyclic intensity character of crack, Strength Problem.147, (9) 20-28(1981). (in Russian).
[12]	Xian-Kui Zhu, James A. Joyce, Review of fracture toughness (G, K, J, CTOD, CTOA) testing and standardization, Engineering Fracture Mechanics, 85, 1-46, (2012).
[13]	U. Zerbst, S. Beretta, G. Kohler, A. Lawton, M. Vormwald, H.Th. Beier, C. Klinger,I. C erny´, J. Rudlin, T. Heckel a, D. Klingbeil, Safe life and damage tolerance aspects of railway axles – A review. Engineering Fracture Mechanics. 98, 214–271 (2013).
[14]	Yu Yangui, MaYanghuia, The Calculation in whole Process Rate Realized with Two of Type Variable under Symmetrical Cycle for Elastic-Plastic Materials Behavior, in: 19th European Conference on Fracture, (Kazan, Russia, 26-31 August, 2012), In CD, ID 510.
[15]	Yu Yangui, Bi Baoxiang, MaYanghau, Xu Feng. Damage Calculations in Whole Evolving Process Actualized for the Materials Behaviors of Structure with Cracks to Use Software Technique. In: International Conference on Fracture Proceeding. Ottawa, Canada. 2009; 12-19. CD.
[16]	China Machine Press, Machine Design Handbook, Vol (5),2004; 31-125 (in chinese).
[17]	Yangui Yu, The Life Predicting Calculations in Whole Process Realized from Micro to Macro Damage with Conventional Materials Constants. American Journal of Science and Technology.2014. Vol. 1, No. 5, 2014, pp. 310-328.