title: Research on torsional friction behavior and fluid load support of PVA/HA composite hydrogel.
abstract: Hydrogels have been extensively studied for use as synthetic articular cartilage. This study aimed to investigate (1) the torsional friction contact state and the transformation mechanism of PVA/HA composite hydrogel against CoCrMo femoral head and (2) effects of load and torsional angle on torsional friction behavior. The finite element method was used to study fluid load support of PVA/HA composite hydrogel. Results show fluid loss increases gradually of PVA/HA composite hydrogel with torsional friction time, leading to fluid load support decreases. The contact state changes from full slip state to stick-slip mixed state. As the load increases, friction coefficient and adhesion zone increase gradually. As the torsional angle increases, friction coefficient and slip trend of the contact interface increase, resulting in the increase of the slip zone and the reduction of the adhesion zone. Fluid loss increases of PVA/HA composite hydrogel as the load and the torsional angle increase, which causes the decrease of fluid load support and the increase of friction coefficient.
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China. Electronic address: cumtck@cumt.edu.cn.
authors.forename: Kai
authors.initials: K
authors.lastname: Chen
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Dekun
authors.initials: D
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Xuehui
authors.initials: X
authors.lastname: Yang
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Xiaotong
authors.initials: X
authors.lastname: Cui
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Xin
authors.initials: X
authors.lastname: Zhang
authors.affiliation: School of Materials Science and Engineering, China University of Mining and Technology, Xuzhou 221116, China.
authors.forename: Qingliang
authors.initials: Q
authors.lastname: Wang
mesh_terms: D002358:Cartilage, Articular; D005269:Femur; D020342:Finite Element Analysis; D017276:Friction; D006622:Hip Prosthesis; D006801:Humans; D006820:Hyaluronic Acid; D020100:Hydrogels / Q000737:chemistry*; D008422:Materials Testing; D011142:Polyvinyl Alcohol
chemical_list: D020100:Hydrogels; D011142:Polyvinyl Alcohol; D006820:Hyaluronic Acid
keywords: Finite element method; Fluid load support; PVA/HA composite hydrogel; Torsional friction