Collective evolution of surface microcrack for compacted graphite iron under thermal fatigue with variable amplitude
文献类型：期刊论文
| 作者 | 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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| 刊名 | INTERNATIONAL JOURNAL OF FATIGUE
 |
| 出版日期 | 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 |
| 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. |
入库方式： OAI收割
来源：力学研究所
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