| 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)
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| Source Publication | INTERNATIONAL JOURNAL OF FATIGUE
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| 2019 | |
| Volume | 118Pages:139-149 |
| ISSN | 0142-1123 |
| Abstract | 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. |
| Keyword | Thermal fatigue Variable amplitude Surface microcrack Collective evolution Compacted graphite iron |
| DOI | 10.1016/j.ijfatigue.2018.09.005 |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:000449245700014 |
| WOS Keyword | HIGH-POWER LASER ; NUMERICAL-SIMULATION ; FRACTAL ANALYSIS ; CRACK GROWTH ; PROPERTY ; STEEL |
| WOS Research Area | Engineering, Mechanical ; Materials Science, Multidisciplinary |
| WOS Subject | Engineering ; Materials Science |
| Funding Organization | National Natural Science Foundation of China [11272316, 11502269, 11672304, 11272317] ; Chinese Academy of Sciences [yz201636] |
| Classification | 一类 |
| Ranking | 1 |
| Contributor | Yu, G ; He, XL |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/78474 |
| Collection | 先进制造工艺力学实验室 |
| Affiliation | 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 |
| Recommended Citation 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.Rp_Au:Yu, G, He, XL |
| 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. |
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| Jp2019052.pdf（2100KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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