Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude

doi:10.1016/j.ijfatigue.2018.09.005

CORC > 力学研究所 > 中国科学院力学研究所 > 先进制造工艺力学重点实验室

	Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude
	Pan SN(潘斯宁); Yu G(虞钢); He XL(何秀丽); Li SX(李少霞); Zhang Y(张越); Li QY(李清羽)
刊名	INTERNATIONAL JOURNAL OF FATIGUE
	2019
卷号	118 页码:139-149
关键词	Thermal fatigue Variable amplitude Surface microcrack Collective evolution Compacted graphite iron
ISSN号	0142-1123
DOI	10.1016/j.ijfatigue.2018.09.005
英文摘要	With the growing demand of good performance and high reliability of the heated components, the cracking failure caused by the complex thermal loading of variable amplitude has become a crucial problem. The collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude is studied in this paper, which is induced by pulsed laser. The thermal microcrack is analyzed with statistic method and fractal method systematically. The result shows that, the secondary microcrack is the primary crack pattern, and the number of main microcrack is the least. As the test goes on, the fractal dimension increases following the Hill's function. Furthermore, the effect of maximum temperature T-max and superimposed number N-HCP on the crack evolution is investigated. T-max in the heating stage mainly affects the number of main microcrack. With the increase of plastic strain amplitude, the fractal dimension increases exponentially, and gradually tends to be the critical fractal dimension D-o of 1.395. The superimposed number N-HCP in the high-cycle stage mainly affects the number of secondary microcrack. The fractal dimension increases exponentially with the increase of N-HCP, and tends to be the critical fractal dimension D-o of 1.404. The analysis of the collective behavior of surface microcrack is helpful for evaluating the damage degree and predicting the lifetime, which can be applied to other materials working under thermal loading of variable amplitude.
分类号	一类
WOS关键词	HIGH-POWER LASER ; NUMERICAL-SIMULATION ; FRACTAL ANALYSIS ; CRACK GROWTH ; PROPERTY ; STEEL
WOS研究方向	Engineering, Mechanical ; Materials Science, Multidisciplinary
语种	英语
WOS记录号	WOS:000449245700014
资助机构	National Natural Science Foundation of China [11272316, 11502269, 11672304, 11272317] ; Chinese Academy of Sciences [yz201636]
其他责任者	Yu, G ; He, XL
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/78474]
专题	力学研究所_先进制造工艺力学重点实验室
作者单位	1.{Pan, Sining、Yu, Gang、He, Xiuli、Li, Shaoxia、Zhang, Yue、Li, Qingyu} Chinese Acad Sci, Inst Mech, Beijing, Peoples R China 2.{Pan, Sining、Yu, Gang、He, Xiuli、Zhang, Yue、Li, Qingyu} Univ Chinese Acad Sci, Sch Engn Sci, Beijing, Peoples R China 3.{Pan, Sining} Hezhou Univ, Coll Mech & Elect Engn, Hezhou Shi, Guangxi Zhuangz, Peoples R China
推荐引用方式 GB/T 7714	Pan SN,Yu G,He XL,et al. Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude[J]. INTERNATIONAL JOURNAL OF FATIGUE,2019,118:139-149.
APA	潘斯宁,虞钢,何秀丽,李少霞,张越,&李清羽.(2019).Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude.INTERNATIONAL JOURNAL OF FATIGUE,118,139-149.
MLA	潘斯宁,et al."Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude".INTERNATIONAL JOURNAL OF FATIGUE 118(2019):139-149.