学术讲座:SOLID VISCOELASTICITY IN CONTACT MECHANICS AND ELASTOHYDRODYNAMIC LUBRICATION

发布者:邓士豪发布时间:2022-11-11浏览次数:10

报告题目:SOLID VISCOELASTICITY IN CONTACT MECHANICS AND ELASTOHYDRODYNAMIC LUBRICATION

时间20221213日(周二)下午3:00-4:30

腾讯会议902-500-3931,密码:470901

主持人王静教授

主讲人中文简介C.H. Venner荷兰特文特大学获博士学位,在以色列魏茨曼学院从事博士后工作。目前任荷兰特文特大学一级教授,工学技术学院流体动力工程系主任, SKF工程研发中心高级咨询专家, ASME Journal of Tribology 副主编(1998-2006两届),ImechE part J. Journal of Engineering Tribology编委(2002-今),国际轴承会议-轴承世界(德国汉诺威)科学委员会成员。特文特大学教授认命委员会成员、代尔夫特技术大学终身教职和教授认命委员会委员。

C.H. Venner教授是薄膜流动和弹流润滑领域的国际知名专家在流体动力学及相关领域如薄膜流动(滚动轴承、齿轮等的润滑)、计算流体力学,工程和物理、航空动力学、航空声学的多尺度/多重网格/计算方法等方面有25年的研究经验所构建的算法应用范围从分子间的相互作用到润滑问题、复合材料和非均质材料的结构力学问题、声学问题、形貌优化、固液界面设计、代数多重网格法、多重网格图像区分法、高雷诺数的计算流体力学研究、航空动力学及空气流动的多重网格方法。在国际期刊和会议论文集中发表学术论文200余篇出版专著《Multilevel Methods in Lubrication》。。

报告内容摘要:

Lubricated concentrated contacts are common in engineering applications, mostly between "hard" materials (steel) as in rolling bearings, cam-followers, and gears, but also between a hard and a soft part as in the case of a steel and an elastomeric seal. In recent decades, soft materials are increasingly used in mechanical engineering, in aviation industry, and in various processes in physics, and biomechanics, due to advantages such as light weight, good recyclability, and controllable design-performance capability. For “hard” materials, the deformation of the contacting elements is predominantly elastic. The understanding of the physical mechanisms governing the lubrication film formation and the associated pressure generation has reached a very high level of predictability. However, soft materials exhibit viscoelastic behavior in contacts, and, in spite of the excellent work that has been done regarding the elastomeric seal contacts, the current understanding of the effect of solid viscoelasticity on the lubrication of soft contacts, particularly for point contacts, is less advanced than the understanding of the purely elastic contacts. This limits the design and performance optimization of the related tribological contacts andsystems. In this presentation fundamental aspects of the modeling and efficient numerical simulation of viscoelastic point contact problems are introduced.

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