Naiyi Li

Bio: Naiyi Li is an academic researcher from Ford Motor Company. The author has contributed to research in topics: Fatigue limit & Tire balance. The author has an hindex of 3, co-authored 4 publications receiving 27 citations.

Wheel Impact Performance with Consideration of Material Inhomogeneity and a Simplified Approach for Modeling

Abstract: The focus of this research deals with wheel impact testing. The test procedure SAE J175 is used to access the wheel impact performance, which involves a striker dropped freely onto the rim flange of the wheel. The wheel is mounted at a 13° incline and a tubeless tire inflated to 200 kPa is assembled with the wheel. Numerical implementation of wheel impact testing is essential to shorten design time, enhance wheel mechanical performance, and lower development cost. A numerical model of an aluminum wheel with its tire was developed. Impact simulations were conducted to investigate the stress and strain performance during wheel impacting. Material inhomogeneity of the wheel was taken into consideration by assigning different stress/strain properties to the hub, spoke, and rim regions of the wheel based on observations acquired from tensile test specimens extracted from the corresponding areas. Numerical predictions illustrate that the tire model is capable of transmitting impact loads like the actua...

Shape optimisation by design of experiments and finite element methods—an application of steel wheels

Abstract: The requirements made on industry, and particularly on development departments, are increasing constantly due to demands to reduce costs and development times and the introduction of new quality guidelines (Toutenburg and Gossl, Versuchsplanung in der industrie; moderne methoden und softwarelosungen. Proceedings des workshops versuchsplanung in der industrie der boehringer mannheim GmbH und SAS-Institute, Tutzing 30./31.10.1995. Prentice Hall Verlag, Munchen, 1996). In particular, several loops are usually required within the development process during the development of new parts to obtain an optimal part shape. This process is extensively influenced by the experience and know-how of the developer or design engineer. A method that enables a specific and structured approach to part shape optimisation is presented in this paper. Design of experiments and the finite element method are interlinked in this method.

Numerical simulation of dynamic side impact test for an aluminium alloy wheel

Abstract: A great number of wheel test are requited in designing and manufacturing of wheels to meet the safety requirements. The impact performance of wheel is a major concern of a new design. The test procedure has to comply with international standards, which establishes minimum mechanical requirements, evaluates axial curb and impact collision characteristics of wheels. Numerical implementation of impact test is essential to shorten the design time, enhance the mechanical performance and lower development cost. This study deals with the simulation of impact test for a cast aluminium alloy wheel by using 3‐D explicit finite element methods. A numerical model of the wheel with its tire and striker were developed taking account of the nonlinearity material properties, large deformation and contact. Simulation was conducted to investigate the stress and displacement distributions during wheel impact test. The analyses results are presented as a function of time. The maximum value of the displacement and stress on the wheel and tire are shown. As a result, the use of explicit finite element method to predict the performance of new products design is replacing the use of physical test.