Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude
文献类型：期刊论文
| 作者 | Pan SN(潘斯宁); Chen R(陈茹) |
| 刊名 | ENGINEERING FAILURE ANALYSIS
 |
| 出版日期 | 2019-08-01 |
| 卷号 | 102页码:284-292 |
| 关键词 | Crack Thermal fatigue Variable amplitude Evolution prediction Compacted graphite iron |
| ISSN号 | 1350-6307 |
| DOI | 10.1016/j.engfailanal.2019.04.043 |
| 通讯作者 | Pan, Sining(supereve122@163.com) |
| 英文摘要 | With the development of engine and environmental protection, thermal cracking has become one of the main failure modes of components and materials working under complex thermal conditions. The fatigue microcrack and evolution prediction model of compacted graphite iron under thermal fatigue with variable amplitude is studied in this paper, which is induced by pulsed laser. According to the different length, microcracks shorter than 0.1 mm and longer than 0.3 mm are defined as "secondary microcrack" and "main microcrack", respectively. Results show that, the secondary microcrack caused by the superimposed high-cycle thermal loading shows different behavior of initiation and propagation with the main microcrack. The propagation of secondary microcrack usually limits in a eutectic cell, because that the energy provided in the high-cycle stage is not enough to break across the eutectic boundary. However, the main microcrack can propagate across the eutectic boundary because of enough energy provided in the low-cycle stage. With consideration of both plastic strain energy density and elastic strain energy density, a modified Paris-type model is proposed based on fractal theory. The threshold Delta W-th is introduced to evaluate the damage contribution of elastic strain energy density. The proposed model is helpful for lifetime prediction of components and materials working under thermal fatigue with variable amplitude. |
| 分类号 | 二类 |
| WOS关键词 | THERMOMECHANICAL FATIGUE ; LASER ; PROPERTY ; DAMAGE |
| 资助项目 | Doctor's Scientific Research Foundation of Hezhou University[HZUBS201806] ; Hezhou Foundation Research and Development of Science and Technology[201707007] ; Hezhou Foundation Research and Development of Science and Technology[201808011] ; Teaching Reform Project for Higher Education Undergraduate Course of Guangxi Education Department[2015JGA360] |
| WOS研究方向 | Engineering ; Materials Science |
| 语种 | 英语 |
| WOS记录号 | WOS:000467804800024 |
| 资助机构 | Doctor's Scientific Research Foundation of Hezhou University ; Hezhou Foundation Research and Development of Science and Technology ; Teaching Reform Project for Higher Education Undergraduate Course of Guangxi Education Department |
| 其他责任者 | Pan, Sining |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/80693]  |
| 专题 | 力学研究所_先进制造工艺力学重点实验室 |
| 推荐引用方式 GB/T 7714 | Pan SN,Chen R. Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude[J]. ENGINEERING FAILURE ANALYSIS,2019,102:284-292. |
| APA | 潘斯宁,&陈茹.(2019).Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude.ENGINEERING FAILURE ANALYSIS,102,284-292. |
| MLA | 潘斯宁,et al."Fatigue crack and evolution prediction of compacted graphite iron under thermal loading with variable amplitude".ENGINEERING FAILURE ANALYSIS 102(2019):284-292. |
入库方式： OAI收割
来源：力学研究所
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