ZHANG Yali

Associate Professor

Email: zhangyali@swjtu.edu.cn

Office: Room 314, Tribology Research Institute Building, Jiuli Campus

Links: https://faculty.swjtu.edu.cn/zhangyali/zh_CN/index.htm

BIO

Education

PhD, Xi'an Jiaotong University, Mechanical Design and Theory (2013)

B.S., Chongqing University, Mechanical Design and Theory (2007)

Employment

Academic Appointments

Associate Professor, Mechanical Engineering, Southwest Jiaotong University, China (2021-present)

Lecturer, Mechanical Engineering, Southwest Jiaotong University, China (2015-2020)

Research Interests

Biomechanics of Artificial Joint

The biomechanical environment after artificial joint replacement is an important standard to guide the design of the prosthesis, surgical installation, and revision of the prosthesis. Finite element analysis combined with musculoskeletal multi-body dynamics simulation is an effective method for biomechanical research. By establishing a multi-body dynamic model of bone and muscle including bones, muscles, ligaments and cartilage tissues, the biomechanical environment after the replacement of the main joints of the human body is studied, and the motion mode of the prosthesis and the precise boundary conditions for finite element research are obtained. Using the above analysis methods, the team has achieved excellent results in the research of hip and knee joint replacement and revision, temporomandibular joint and cervical joint replacement, and porous material properties.

Biotribology of Artificial Joint

For a long time, wear has been the bottleneck of the service performance and life of artificial joint prostheses. Aseptic loosening caused by wear debris is an important reason for the failure of artificial joints. In addition, the design trend of artificial joints has evolved from anatomical shapes to musculoskeletal mechanical functions. However, the requirements for joint kinematics and wear are contradictory. The collaborative optimization of musculoskeletal mechanical functions and tribological performance is still a world problem. The team used the above-mentioned bone-muscular multi-body dynamics analysis method, combined with tribological optimization design, focused on the key mechanism and core mechanism of the evolution of the artificial joint's in-vivo service behavior, and explored the regulation mechanism of the near-natural motion function and the life of the prosthesis.

Optimized design of personalized artificial joints

In recent years, researchers have found that the failure of the sliding surface and the fixed surface of the artificial joint is not an isolated event. Poor design of the sliding surface will affect the contact mechanics of the fixed surface and cause the fixed surface to loosen. In addition, the stability of the fixed surface will also affect the running effect of the sliding surface. Therefore, after artificial joint replacement, as long as one of the sliding surface and the fixed surface has a design and use defect, it is easy to cause the failure process to accelerate under the long-term mutual influence, and eventually cause the replacement to fail. It can be seen that independent sliding surface or fixed surface design improvement can no longer meet the current requirements, and the design trend of artificial joints should develop from the stage of independently solving the sliding surface wear problem and the fixed surface stability problem to the research of the sliding surface and the fixed surface coupling design.

SELECTED PUBLICATIONS

Principal Publications of the Last Five Years

Zhang, YL*, X. Zhang, Z. Jin, Deterministic investigation of the contact behavior of nominally curved rough surfaces. Industrial Lubrication and Tribology, 2020, 72(6):743-748.

Cui, W.#, Y. Bian#, H. Zeng, X. Zhang, Zhang,YL *, X. Weng, S. Xin, Z. Jin, Structural and tribological characteristics of ultra-low-wear polyethylene as artificial joint materials. Journal of the Mechanical Behavior of Biomedical Materials, 2020,104: 103629.

Zhang, X., Zhang YL*, Z. Jin, A semi-analytical approach to the elastic loading behaviour of rough surfaces. Friction, 2019: 1-12.

Zhang XG, Zhang YL, Numerical investigation of sliding friction behaviour and mechanism of engineering surfaces[J]. Industrial Lubrication and Tribology, 2019, 71 (2): 205-211.

Zhang XG, Zhang YL, Wang JM, Sheng CX, Li ZX. Prediction of sliding friction coefficient based on a novel hybrid molecular-mechanical model[J]. Journal of nanoscience and nanotechnology, 2018, 18(8): 5551-5557.

Zhang YL, Zhang XG, Wu TH, Xie YB and Peng ZX.  Effects of surface texturing on the tribological behavior of piston rings under lubricated conditions[J]. Industrial Lubrication and Tribology, 2016,68(2): 158-169.

Zhang YL, Zhang XG and Matsoukas G. Numerical study of surface texturing for improving tribological properties of ultra-high molecular weight polyethylene[J]. Biosurface and Biotriology, 2015,1(4): 270-277.

RESEARCH

Current Research

In-vivo behavior and control mechanism of high-function, long-life artificial joint interfaces

Multi-modes fretting-corrosion mechanism of modular taper interfaces for artificial joints

NQI technology research, integration and application of carbon-based nanomaterials such as graphene

Study on the wear mechanism induced by the in vivo biomechanical environment of artificial cervical disc

Research on Synergistic Lubrication and Failure Mechanism of Artificial Joints in Complex Service Environment

TEACHING

Primary Teaching areas

Mechanical Engineering

Current Courses

Fundmentals of Mechanical Manufacturing Technology

Mechanical Accuracy Design and Verification Foundation

Manufacturing Technology A

Fundamentals of Materials Formation