Dynamic contact stress and frictional heat analysis of femoral head-on-acetabular cup interface based on calculation and simulation methods. Issue 10 (17th November 2021)

• Record Type: Journal Article
• Authors: Fang, Xingxing; Li, Dahan; Xin, Yucheng; Wang, Songquan; Guo, Yongbo; Hu, Ningning; Zhang, Dekun
• Is Part Of: Industrial lubrication and tribology. Volume 73:Issue 10(2021)
• Page Start: 1302
• Page End: 1309
• Publication Date: 2021-11-17
• Subjects: Biomaterials -- Contact temperature -- Contact stress -- Acetabular cup -- Thermodynamic analysis -- Tribology -- Hip joint prostheses -- Dynamic contact stress -- Frictional heat; Lubrication and lubricants -- Periodicals; Tribology -- Periodicals; 621.89
• DOI: 10.1108/ILT-07-2021-0261
• Languages: English
• ISSNs: 0036-8792

Abstract

Abstract : Purpose: The purpose of this paper is to systematically study the dynamic contact stress, frictional heat and temperature field of femoral head-on-acetabular cup contact pairs in a gait cycle. Design/methodology/approach: In this paper, four common femoral head-on-acetabular cup contact pairs are used as the research objects, mathematical calculations and finite element simulations are adopted. The contact model of hip joint head and acetabular cup was established by finite element simulation to analyze the stress and temperature distribution of the contact interface. Findings: The results show that the contact stress of the head-on-cup interface is inversely proportional to the contact area; high contact stress directly leads to greater frictional heat. However, hip joints with metal-on-polyethylene or ceramic-on-polyethylene paired interfaces have lower frictional heat and show a significant temperature rise in one gait cycle, which may be related to the material properties of the acetabular cup. Originality/value: Previous studies about calculating the interface frictional heat always ignore the dynamic change process in the contact load and the contact area. This study considered the dynamic changes of the contact stress and area of the femoral head-on-acetabular cup interface, and four common contact pairs were systematically analyzed.