应机械结构强度与振动国家重点实验室的邀请,哈尔滨工业大学周广春教授和德国Fraunhofer Institute of Germany的Vladimir A Kolupaev博士来e世博
访问并做学术报告。
时 间:2019年10月10号(星期四)9:30-12:00
地 点:e世博
教一楼第三会议室
报告1:
题目:材料强度研究瓶颈与突破
报告摘要:
1. 材料强度研究瓶颈与释解。简介对材料强度研究瓶颈问题与质疑,简介近年创立的“结构受力状态理论”,即突破材料强度研究瓶颈问题的理论基础。
2. 介绍解释材料强度尺寸效应的方法,及其据此发现的实质材料强度与强度公式。
实质强度与强度公式可能颠覆了数百年来关于材料强度的两个定论:“材料强度具有尺寸效应是其固有属性”、“不存在一个适合各种材料、各种破坏形式的强度理论,即不存在强度定律”。期待通过进一步的验证,实质强度能更新目前材料强度的测定方法与指标,强度公式能取代或推演出各种强度理论和材料强度准则,更期待实质强度与强度公式在工程中取得成效。
报告人简介:
周广春,男,教授,1958年4月出生,黑龙江哈尔滨市人,哈尔滨工业大学土木工程学院力学与能源工程结构学科主任。1982和1987分获哈尔滨建筑工程学院(今哈尔滨工业大学)力学学士学位、结构力学硕士学位;2002年获英国普利茅斯大学结构工程博士学位;近十年致力于探索、挑战、颠覆、开创性研究目标,突破了结构分析、材料强度等研究瓶颈,开创了“结构受力状态分析理论”和“结构人工智能分析理论与应用”、发现了“实质材料强度”并建立了“强度公式(或强度定律)”、初创了“宏观结构量子力学”。在国内外已发表研究论文50余篇,出版教材3部。
报告2:
题目:VERSATILE STRENGTH CRITERION: APPLICATION ON CONCRETE
报告摘要:
We propose a universal, generally applicable yield criterion that describes a single convex surface in principal stress space encompassing extreme yield figures as convexity limits. The novel criterion is derived phenomenological exploiting geometrical properties of yield surfaces in principal stress space. It is systematically compared with known yield criteria using different forms of visualization.
Using a I1-substitution the criterion is applicable to materials with pressure-sensitive behavior and contains well-known strength criteria. Introducing appropriate parameter restrictions, it can be applied for the modeling of ductile and brittle material behavior.
The implementation of the present criterion eliminates the necessity of choosing a specific yield criterion for a particular material. The proposed criterion allows for excellent approximation of experimental data. It is applied to measured data of concrete and provides better accuracy than existing criteria from literature.
报告人简介:
Dr. Vladimir A. Kolupaev is now working in Fraunhofer Institute of Germany. He completed his post-doctor research at Xi’an Jiaotong University in 2012, obtained the doctor degree of mechanical engineering at Martin Luther University in 2006. His research focuses on the mechanics of polymers, he has excellent skills in mechanical experiments and good experiences in visualization of results.