STUDY ON CHARACTERISTICS OF DAMAGE MECHANICS FOR DUCTILE IRON

Q4 Engineering

Journal of Mechanical Strength Pub Date : 2004-01-01 DOI:10.4028/0-87849-413-8.347

Jiang Zhi

引用次数: 0

Abstract

According to principle of damage mechanics, the damage characteristics of ferrite nodular cast iron under uniaxial stress has been studied through measuring electric resistance. The results showed that the damage in nodular cast iron happens when the applied stress is more than a certain extent, and the damage value increases with stress. The evolutional law of damage value as a function of stress was obtained. The damage threshold of nodular cast iron exists and increases with nodularity, but this threshold is always below the yield strength, which has related significant reference to the design of machinery structure and the choice of materials. The critical damage value is not related to the nodularity, which is about 0.06～0.068 under the present test condition.

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球墨铸铁损伤力学特征研究

根据损伤力学原理，通过测量电阻，研究了铁素体球墨铸铁在单轴应力作用下的损伤特性。结果表明:当外加应力大于一定程度时，球墨铸铁发生损伤，损伤值随外加应力的增大而增大;得到了损伤值随应力变化的演化规律。球墨铸铁存在损伤阈值，并随着球化程度的增加而增大，但该阈值始终低于屈服强度，这对机械结构的设计和材料的选择具有重要的参考意义。临界损伤值与球化程度无关，在本试验条件下约为0.06~0.068。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Journal of Mechanical Strength Engineering-Mechanical Engineering

CiteScore

0.70

自引率

0.00%

发文量

5969

期刊介绍： Journal of Mechanical Strength is an academic and technical journal governed by China Machinery Industry Federation，sponsored by Zhengzhou Research Institute of Mechanical Engineering Co., Ltd. and Chinese Mechanical Engineering Society. It mainly publishes research articles, reviews and newsletters with innovative, economic and practical application in the fields of machinery, strength, vibration and material strength. Journal of Mechanical Strength was founded in May 1975, bi-monthly issued. The publishing scope covers mechanical structure strength, micro electro mechanical systems (MEMS), reliability, optimization design, mechanical design, calculation methods, fatigue, damage, fracture, vibration, noise, fault diagnosis and monitoring, testing technology, detection and evaluation, testing instruments, experimental stress analysis, residual stress, failure analysis and related interdisciplinary subjects. The aimed readers of the journal are researchers, designers and developers in machinery industry, as well as teachers and students in universities. The journal is included by the Statistical Source Journal of Chinese Scientific and Technological Papers (Key Magazine of China Technology) (since 1989), Chinese Core Journal (since 1992), Important Chinese Journal of Academic Degrees and Postgraduate Education (since 1995), source journal of the Chinese Science Citation Database (since 1996), Science Abstract (UK) (since 1995), China Quality Scientific and Technological Journals (300 journals) (2008), Top 20 Journals of Natural Science of Henan Province (2008), RCCSE China Authoritative Academic Journal (A+) (2012), and Top 20 Journals of Natural Science of Henan Province (2013). The Journal is also indexed by Scopus Database，Chemical Abstract (CA), Japan Science and Technology Agency (JST), and Report of World Journals Clout Index (WJCI) (2021).