大连理工大学学报Issue(4)：373-379,7.DOI:10.7511/dllgxb201504006
考虑临界变形量变化的结合面法向接触刚度计算模型
Calculation model for normal contact stiffness of joint surfaces considering critical deformation change
摘要
Abstract
Considering the critical deformation change of asperities contact,a calculation model for normal contact stiffness of joint surfaces is presented.The topographic characteristics of joint surfaces are described based on fractal geometry,and the fractal parameters D and G of fractal function are derived from measurement data of surface topography.According to the elastic-plastic deformation contact theory,the contact deformation characteristics of asperities are analyzed,and the critical deformation estimation model is presented,which expresses critical deformation as the function of fractal parameters and contact deformation of asperities,and the contact stiffness calculation model of single asperity is brought forward considering critical deformation change.The asperity statistical distribution function of rough surface is built based on the fractal theory.Additionally,combining the contact stiffness calculation model of single asperity and the asperity statistical distribution function, the calculation model for normal contact stiffness of joint surfaces is built.Finally,the comparison between calculated results and experimental data verifies the rationality of the proposed model.关键词
结合面/法向接触刚度/分形几何/临界变形量/微凸体分布函数Key words
joint surfaces/normal contact stiffness/fractal geometry/critical deformation/asperity statistical distribution function分类
机械制造引用本文复制引用
党会鸿,孙清超,马跃,黄信..考虑临界变形量变化的结合面法向接触刚度计算模型[J].大连理工大学学报,2015,(4):373-379,7.基金项目
国家自然科学基金资助项目(51475077) （51475077）
辽宁省科技创新重大专项资助项目(201301002) （201301002）
