Abstract
Objective: The fatigue strength of a new type of vertical retort under the cyclic load of heat engine was studied, especially the residual fatigue life of the pot body after the crack appeared and the factors affecting the fatigue crack propagation of the germicidal pot. Methods: The mechanical characteristics of retort under sterilization and three kinds of cyclic loads were analyzed by Workbench, the design fatigue life of the retort under three alternating stresses was studied based on the S-N curve. The effect of the initial crack size, pressure and temperature on the stress strength factor and residual fatigue life of the crack retort were studied based on fracture mechanics. Results: The design fatigue life of this type of vertical retort was calculated to be 5×105 times, which meet the design requirements, and has a certain safety margin. Based on the fracture mechanics analysis, the crack size life curve of the sterilization retort was obtained, and the residual life of the sterilization retort with defects was predicted, which had certain innovation. Conclusion: Attention should be paid to the occurrence and propagation of cracks in the pot during use. The strength analysis and life prediction analysis of crack defects in the sterilization retort can be carried out according to the method proposed in this paper and experiment.
Publication Date
4-25-2023
First Page
85
Last Page
90
DOI
10.13652/j.spjx.1003.5788.2022.90255
Recommended Citation
Jin-peng, LIU; Li-mei, ZHANG; and Zhi-gang, HUANG
(2023)
"Full-life fatigue analysis of vertical retort based on fracture mechanics,"
Food and Machinery: Vol. 39:
Iss.
1, Article 14.
DOI: 10.13652/j.spjx.1003.5788.2022.90255
Available at:
https://www.ifoodmm.cn/journal/vol39/iss1/14
References
[1] 轩福贞, 朱明亮, 王国彪. 结构疲劳百年研究的回顾与展望[J]. 机械工程学报, 2021, 57（6）: 26-51.
[2] 张杰, 郝明涛, 江保全, 等. 具有典型结构压力容器的疲劳分析设计[J]. 石油和化工设备, 2021, 24（2）: 5-10, 21.
[3] 张振华, 史建新, 李小龙, 等. 增压锅炉冷态启动过程中耦合应力及疲劳分析[J]. 哈尔滨工程大学学报, 2021, 42（7）: 997-1 002.
[4] NEWMAN J C, RAJU I S. An empirical stress-intensity factor equation for the surface crack[J]. Engineering Fracture Mechanics, 1976, 15（1/2）: 185-192.
[5] 谢阳, 龙伟, 赵波, 等. 压力容器疲劳加载下埋藏裂纹扩展规律的研究[J]. 四川大学学报（自然科学版）, 2021, 58（2）: 149-154.
[6] SUSMIKANTI M, HIMAWAN R, HARTINI E, et al. Analysis of 3d semi-elliptical crack on reactor pressure vessel wall with load stress and crack ratio[J]. Journal Teknologi Reaktor Nuklir Tri Dasa Mega, 2019, 21（1）: 33-38.
[7] 杨玉强, 李张治, 李德雨, 等. 基于ANSYS含体积型缺陷波纹管疲劳寿命研究[J]. 压力容器, 2020, 37（11）: 33-38, 64, 69.
[8] WU E, ZHAO Y, ZHAO B, et al. Fatigue life prediction and verification of high-pressure hydrogen storage vessel[J]. International Journal of Hydrogen Energy, 2021, 46（59）: 30 412-30 422.
[9] LIU K T, HUANG M, LIN J J, et al. The effects of thermal stress on the crack propagation in AP1000 reactor pressure vessel[J]. Theoretical and Applied Fracture Mechanics, 2020, 110: 102798.
[10] 李荆礼, 张丽梅, 吴丹, 等. 有裂纹立式杀菌锅的力学特性与可靠性研究[J]. 食品与机械, 2021, 37（6）: 109-113, 161.
[11] AINSWORTH R A, ZERBST U. Review on fracture and crack propagation in weldments: A fracture mechanics perspective[J]. Engineering Fracture Mechanics, 2014, 132（2）: 200-276.
[12] 邱海飞, 韩斌斌. 模具用弓形架结构拓扑优化及疲劳分析[J]. 食品与机械, 2019, 35（3）: 99-103.
[13] PARIS P. A critical analysis of crack propagation laws[J]. Journal of Basic Engineering, 1963, 85（4）: 528-533.
[14] 赵少汴. 抗疲劳设计手册[M]. 北京: 机械工业出版社, 2015: 266.