英国Strathclyde大学机械与航空系陈浩峰教授到我院做学术报告
应宁波大学机械工程与力学学院邀请，英国Strathclyde大学机械与航空系陈浩峰教授于2019年1月7日星期一来我院做学术报告，报告题目“Ratchet and Fatigue Analysis of Structures under Generalised Thermo-Mechanical Loading”。
陈浩峰教授向学院师生介绍了其研究团队所建立的用于材料及结构设计和完整性评估的新型数值方法及相应规范和软件。陈浩峰教授在材料及结构完整性评估数值方法，高温金属结构的蠕变疲劳，高温复合材料的安全评估和寿命预测，含裂纹／焊接结构的完整性，以及在极限安定分析，高温结构棘轮破坏分析等方面做出了开创性的研究成果。
陈浩峰教授的报告吸引了很多学院的师生前来参加，报告厅里座无虚席，观众对他的介绍反应热烈，不时有深入的讨论和问题。这次报告也吸引了学校之外的许多听众，反映了大家对陈教授的研究工作的高度关注。
Ratchet and Fatigue Analysis of Structures under Generalised Thermo-Mechanical Loading
Invited by the School of Mechanical Engineering and Mechanics of Ningbo University, Prof. Haofeng Chen from Departments of Mechanical and Aerospace Engineering, University of Strathclyde, presented a talk entitled " Ratchet and Fatigue Analysis of Structures under Generalised Thermo-Mechanical Loading" to a broad audience of researchers and graduate students on Jan. 7th, 2019.
Prof. Chen clarified the concept of ratcheting that distinguishes the material ratcheting and structural ratcheting, and fatigue including high cycle fatigue (HCF) and low cycle fatigue (LCF) were discussed for structures subjected to cyclic loading condition. He addressed that in terms of ratcheting, different concepts of material ratcheting and structural ratcheting should be clarified. For the ratchet analysis of structures, both the bisection method and generalized method were presented using the Linear Matching Method (LMM) Direct Steady Cycle Analysis (DSCA) procedure. The LMM DSCA method and its software tool were further presented for the low cycle fatigue assessment of structures, with a comprehensive case study of a pressurized shell in the nuclear power plant, considering both the temperature dependent R-O model and the EPP model. The Reverse Plasticity Domain Method (RPDM) based on the LMM DSCA approach combining with shakedown and ratchet limit analysis was proposed to design cyclic load levels for LCF experiments with predefined fatigue life. Finally the effects of creep on ratcheting and fatigue were discussed and the LMM extended DSCA presented for the creep fatigue analysis of structures, with a detailed case study of Mental Matrix Composites (MMCs).
