摘要
针对实际接触过程中微凸体材料硬度随微凸体弹塑性变形而变化的情况,基于结合面三维接触分形建模理论,综合考虑微凸体的弹性接触、弹塑性接触与全塑性接触三种变形模式,建立考虑硬度变化的结合面接触热导三维分形模型,随后与相关文献模型进行了对比。该模型的仿真结果表明:分形粗糙度参数越小,或者分形维数越大,结合面接触热导越大;接触热导随结合面接触率和法向载荷的增大而增大;考虑硬度变化的接触热导大于忽略硬度变化的情况。
In view of the fact that the hardness of the asperity material changes with the elastoplastic deformation of the asperity,based on the three-dimensional contact fractal modeling theory of the joint surface,considering the three deformation modes of the elastic contact,elastoplastic contact and full plastic contact of the asperity,a three-dimensional fractal model of the thermal contact conductance of the joint surface considering the change of hardness is established,and then compared with the relevant literature models.The simulation results of the model in this paper show that the smaller the fractal roughness parameter or the larger the fractal dimension,the greater the thermal contact conductance of the joint surface;the thermal contact conductance increases with the increase of contact rate and normal load.The thermal contact conductance considering the change of hardness is greater than that ignoring the change of hardness.
作者
范伟杰
张学良
张其宗
FAN Wei-jie;ZHANG Xue-liang;ZHANG Qi-zong(School of Mechanical Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China)
出处
《太原科技大学学报》
2025年第6期554-559,共6页
Journal of Taiyuan University of Science and Technology
基金
国家自然科学基金(51275328)
山西省自然科学基金(202203021221151)。
关键词
结合面
分形理论
硬度变化
接触热导
joint surface
fractal theory
hardness change
thermal contact conductance
