中国机械工程2024，Vol.35Issue(8)：1381-1389,1396,10.DOI:10.3969/j.issn.1004-132X.2024.08.006
弹塑性接触冲击永久变形与滑移长度的解析求解
Analytical Solution of Permanent Deformations and Sliding Lengths during the Elasto-plastic Oblique Contact-impacts
摘要
Abstract
For the design and applications of mechanical systems,the elasto-plastic contact impact phenomenon among the multi-body surfaces was one of the key mechanics problems,which contained complex physical and mechanics properties.There still were many controversies and mysteries regard-ing the analysis and characterization of key parameters such as contact force.For the elasto-plastic ob-lique contact-impact events,the calculated formulas of instantaneous contact forces and contact de-formations were established based on the Brake indentation model,and the elasto-plastic contact im-pact process from the contact deformations was described systematically in detail.The internal rela-tionship among impact duration,permanent deformation and sliding length was analyzed analytically based on the generalized momentum theorem,and the permanent deformations and sliding lengths ex-pressed in the integral form were obtained respectively,and then,combined with testing data for the motions of the impact objects before and after contact impact reported in literatures,the analytical so-lution was obtained.The deformation region of the impacted object after the contact impact was meas-ured,and the comparative analysis was also performed.The experimental and numerical results show that the calculated results of the permanent deformations and sliding lengths solved by using the ap-proach developed by the generalized momentum theorem are found to be in good agreement with the experimental data.And this approach yields more accurate results compared to the direct integration of mathematical equations using the Brake indentation model.关键词
弹塑性/倾斜冲击/冲击持时/永久变形/滑移长度Key words
elasto-plastic/oblique impact/impact duration/permanent deformation/sliding length分类
数理科学引用本文复制引用
王尧,管恩广,张青雷..弹塑性接触冲击永久变形与滑移长度的解析求解[J].中国机械工程,2024,35(8):1381-1389,1396,10.基金项目
国家自然科学基金(52105267,51875332) （52105267,51875332）
上海市(临港)产业转型升级发展专项资金(T-220217001) （临港）
