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Shakedown，ratcheting and low‑cycle fatigue behavior analysis of pressure‑bearing structures with pit defects
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Jialin LI, Xiaoxiao WANG, Haofeng CHEN
Pressure Vessel Technology | 2026, 43(1) : 43 - 55
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Pressure Vessel Technology | 2026, 43(1): 43-55
• Designs & Analyses •
Shakedown，ratcheting and low‑cycle fatigue behavior analysis of pressure‑bearing structures with pit defects
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Jialin LI, Xiaoxiao WANG, Haofeng CHEN
Affiliations
  • School of Mechanical and Power Engineering，East China University of Science and Technology，Shanghai 200237，China
Published: 2026-01-30 doi: 10.3969/j.issn.1001-4837.2026.01.006
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Addressing the critical issue that defects such as pits and cracks significantly reduce the load‑bearing capacity of pressure vessels and lead to safety accidents under harsh operating conditions involving high temperature，high pressure，and corrosive media，this study employs the linear matching method（LMM） to systematically analyze the influence mechanism of geometric characteristics of pitting defects on the fatigue behavior of high‑temperature pressure‑bearing structures.The results indicate that local thinned pits significantly reduce the reverse plastic limit，with the axial local thinned pit having the most significant impact，while the limit load of elliptical pits is largely unaffected by pit size.Under high‑temperature environments，the axial local thinned pit increases the total strain range by 53.8%，whereas the circumferential local thinned pit increases it by only 18.1%.The total strain range of elliptical pits is significantly influenced by pit size，increasing with the short axis（axial dimension） and decreasing with the long axis（circumferential dimension）.This study provides a theoretical reference for extending equipment service life and improving production efficiency.

pressure vessel  /  pit defect  /  linear matching method（LMM）  /  fatigue life
李佳琳, 王骁晓, 陈浩峰. 含凹坑缺陷承压结构的安定、棘轮及低周疲劳行为分析. 压力容器, 2026 , 43 (1) : 43 -55 . DOI: 10.3969/j.issn.1001-4837.2026.01.006
Jialin LI, Xiaoxiao WANG, Haofeng CHEN. Shakedown，ratcheting and low‑cycle fatigue behavior analysis of pressure‑bearing structures with pit defects[J]. Pressure Vessel Technology, 2026 , 43 (1) : 43 -55 . DOI: 10.3969/j.issn.1001-4837.2026.01.006
Appendix
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Year 2026 volume 43 Issue 1
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Article Info
doi: 10.3969/j.issn.1001-4837.2026.01.006
  • Receive Date：2025-07-22
  • Online Date：2026-10-23
  • Published：2026-01-30
Article Data
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  • Received：2025-07-22
  • Revised：2025-11-06
Affiliations
    School of Mechanical and Power Engineering，East China University of Science and Technology，Shanghai 200237，China
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https://castjournals.cast.org.cn/joweb/ylrq/EN/10.3969/j.issn.1001-4837.2026.01.006
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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