全校师生：
我校定于2019年6月5日举办研究生灵犀学术殿堂——刘宇澄教授报告会，现将有关事项通知如下：
1.报告会简介
报告人：刘宇澄 教授
时 间：2019年6月5日（星期三） 上午09：00
地 点：友谊校区航空楼A706
报告题目：Experimental Analysis and Computational Modeling of Electroplasticity of Nonferromagnetic Ductile Metals.（非铁磁韧性金属电塑性的实验分析与计算模型。）
内容简介：A multi-physics Internal State Variable (ISV) theory that couples the thermo-elasto-visco-plastic-damage model of Bammann with electricity-related electromagnetic phenomena was formulated with internally consistent kinematics, thermodynamics, and kinetics. An innovative methodology to experimentally distinguish the ElectroPlastic (EP) effect from the thermal expansion was developed and applied to experimentally validate the proposed theoretical electro-mechanical model. Three series of quasi-static uniaxial tension experiments with titanium, copper, and zinc were conducted and a quadratic dependence of the EP stress drop on the electric current density was observed. This study experimentally confirmed the existence of EP as an electron-dislocation interaction phenomenon. The significance of the non-EP effects in the electro-mechanical coupling problems was estimated. The experimental procedure limitations were thoroughly discussed as well as the sensitivity and uncertainty, associated with each of the model parameters. Conclusions and suggestions for future work supplement the study. This piloting work on electro-mechanical coupling opened new horizons for modeling and experimental observation of the electroplastic effect..
（将Bammann的热弹塑性损伤模型与电磁现象耦合的多物理内部状态变量（ISV）理论通过内部一致的运动学、热力学和动力学来制定。开发了一种创新的方法来区分电塑性（EP）效应和热膨胀，并应用于实验验证所提出的理论模型。进行了三系列钛、铜和锌的准静态单轴拉伸实验，并观察到EP应力下降对电流密度的二次依赖性。该研究通过实验证实了EP作为电子-位错相互作用现象的存在。估计了非EP效应在机电耦合问题中的重要性。详细讨论了实验程序的局限性以及与每个模型参数相关的灵敏度和不确定性。结论和对未来工作的建议是对该研究的补充。这项关于机电耦合的试验工作为电塑性效应的建模和实验观察开辟了新的视野。）
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党委学生工作部
航空学院
2019年5月21日
报告人简介
Dr. Yucheng Liu is the Jack Hatcher Chair Professor in the Department of Mechanical Engineering (ME) at Mississippi State University (MSU) and he currently serves as Graduate Coordinator in that department. Prior to joining MSU in 2014, Dr. Liu was the Assistant Professor of the ME Department at the University of Louisiana at Lafayette (UL Lafayette). Dr. Liu received his PhD degree from the University of Louisville in 2005 and Bachelor’s Degree from the Hefei University of Technology in 1997, both in Mechanical Engineering. Dr. Liu’s research has historically focused on the areas of multiscale material modeling and simulation, high strain rate performance of materials, vehicle systems design and analysis, and hydropower and wave energy technology. His current research interests and activities center on gaining a better understanding of the process-structure-property-performance relations of structural materials through advanced multiscale theoretical framework and integrated computational and experimental methods. To date, Dr. Liu has published about 200 peer reviewed publications, including more than 100 peer reviewed journal articles. He has been the PI and co-PI for over 40 research projects funded by NSF, DOD, DOE, NASA, FAA, Louisiana Board of Regents, and industry with the total amount of $8.2M. Dr. Liu has served as a panelist or a reviewer for several NSF, DOD, NASA, and DOE programs. Dr. Liu is a Professional Engineer registered in Ohio State and holds active membership in ASME, SAE, AAAS, and ASEE. Dr. Liu received the Junior Faculty Researcher of the Year of the College of Engineering at UL Lafayette in 2013, the Outstanding Senior Faculty Research Award from the ME Department in 2016, and MSU Faculty Research Award in 2018. He was elected ASME Fellow in 2017, named to the Jack Hatcher Chair in Engineering Entrepreneurship in 2018, and promoted to Full Professor in 2019.
（刘宇澄博士是密西西比州立大学（MSU）机械工程系（ME）的Jack Hatcher讲座教授，目前担任该部门的研究生协调员。在2014年加入密西西比州立大学之前，刘博士是路易斯安那大学拉斐特分校（UL Lafayette）ME部门的助理教授。刘博士于2005年获得路易斯维尔大学博士学位，1997年获得合肥工业大学学士学位。刘博士的研究历来侧重于多尺度材料建模和模拟、材料的高应变率性能、车辆系统设计和分析以及水电和波浪能技术。他目前的研究兴趣和研究活动集中在通过先进的多尺度理论框架、集成的计算和实验方法更好地理解结构材料的过程-结构-性能。迄今为止，刘博士已发表了大约200篇同行评审的出版物，其中包括100多篇同行评审期刊文章。他曾担任NSF、DOD、DOE、NASA、FAA、路易斯安那州董事会和行业资助的40多个研究项目的PI和合作PI，总金额为820万美元。刘博士曾担任多个NSF、DOD、NASA和DOE项目的小组成员或评审员。刘博士是在俄亥俄州注册的专业工程师，拥有ASME、SAE、AAAS和ASEE的活跃会员资格。刘博士于2013年获得UL Lafayette工程学院年度初级学院研究员，2016年获得ME部门杰出高级教师研究奖，以及2018年获得MSU教师研究奖。他于2017年当选为ASME研究员，于2018年入选Jack Hatcher工程创业教席，并于2019年晋升为正教授。）
