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ISSN: 2375-3846

American Journal of Science and Technology

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Calculations on Cracking Strength in Whole Process to Elastic-Plastic Materials---The Genetic Elements and Clone Technology in Mechanics and Engineering Fields

American Journal of Science and Technology
Vol.3 , No. 6, Publication Date: Dec. 14, 2016, Page: 162-173

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Authors

[1]	Yangui Yu, Principal Office, Zhejiang Guangxin New Technology Application Academy of Electromechanical and Chemical Engineering, Hangzhou, China; Wenzhou University, Wenzhou, China.

Abstract

For the decreasing experiments on fatigue, damage and fracture, the author bases on the principles of similar to the genetic genes in the life sciences, adopts the conventional material constants, discovers new constants to some materials of Masing’s and elastic-plastic ones which show inherent properties; uses the theoretical approach which the mathematical derivations, the mechanics analysis and the calculations and analysis of the computer; proposes some new computing models from short to long crack which are the calculable mathematic models on crack problem as the threshold size, the transitional size and the critical ones; and sets up new computing formulas on the strength in different stages; provides the calculating criterions which are defined as the crack size and the stress intensity factor at each stage and in the whole process; and puts forward two kinds of the assessment methods in each stage and in whole process. In addition, to supplement again the comprehensive figure of the material behaviours; to give yet a detailed calculating example applied two of kinks for a safety assessment. This works may be there are practical significances for make linking and communication among the modern the material subject, fracture mechanics and damage mechanics; for to promote engineering applications.

Keywords

Elastic-plastic Materials, Strain Hardening, Strength Criterion, Assessment Method of Crack Size, Assessment in Whole Process

Reference

[01]	Yan Gui Yu. Damage Growth Rate Calculations Realized in Whole Process with Two Kinks of Methods. American Journal of Science and Technology. Vol. 2, No. 4, 2015, pp. 146-164.
[02]	Yangui Yu. The Life Predicting Calculations Based on Conventional Material Constants from Short Crack to Long Crack Growth Process. International Journal of Materials Science and Applications. Vol. 4, No. 3, 2015, pp. 173-188. doi: 10.11648/j.ijmsa.20150403.15.
[03]	Yangui Yu. The Predicting Calculations for Lifetime in Whole Process Realized with Two Kinks of Methods for Elastic-Plastic Materials Contained Crack. Journal of Materials Sciences and Applications. Vol. 1, No. 2, 2015, pp. 15-32.
[04]	Yangui Yu. The Calculations of Crack Propagation Rate in Whole Process Realized with Conventional Material Constants. Engineering and Technology. Vol. 2, No. 3, 2015, pp. 146-158.
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