Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components

Shanghai, China

Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components

Shanghai, China

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Zheng S.,University of Shanghai for Science and Technology | Zheng S.,Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components | Deng X.,University of Shanghai for Science and Technology | Feng J.,University of Shanghai for Science and Technology | Feng J.,Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components
Qiche Gongcheng/Automotive Engineering | Year: 2016

Software ADAMS is applied to a vehicle parameter analysis, indicating that rear axle load is the main factor affecting the lateral force at rear wheel center. Based on this, a finite element analysis on rear axle with torsion beam suspension is conducted with software Hyper Works, revealing the linear relationship between lateral force amplitude at wheel center and the stress amplitude at the critical position of cross member. Then through the analysis on fatigue test cases of torsion beam rear axle of several passenger cars, the mathematical relationship between rear axle load and the loading force for the fatigue test of torsion beam rear axle is established, and a general test specification for the lateral force of torsion beam rear axle is formulated. Finally the feasibility of new test specification is verified by an analysis, comparing with old test specification. © 2016, SAE-China. All right reserved.


Yu J.,University of Shanghai for Science and Technology | Zheng S.,University of Shanghai for Science and Technology | Zheng S.,Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components | Liang G.,University of Shanghai for Science and Technology | And 2 more authors.
Journal of Testing and Evaluation | Year: 2016

This study aims to develop a program-loading spectrum for the accelerated durability test of automotive components, with the lower control arm of a suspension as an example. Spectrum development is divided into three parts, namely, load spectrum acquisition, spectrum preprocessing, and program-loading spectrum development. Based on the strengthening property of structural low-amplitude loads under constant and random loadings, a program-loading spectrum-development method considering the strengthening effect of low-amplitude loads (SLAL) below the fatigue limit is proposed. Meanwhile, an equivalent strengthening methodology is considered during spectrum development. The number of loading cycles is decreased, and the bench test time is notably reduced by adjusting strengthening loads to the most effective level. The bench test proved that the influence of SLAL during spectrum development can simulate actual load conditions more effectively and precisely. Thus, this method can accurately predict fatigue failure from the durability test and can efficiently reduce durability test time. Copyright © 2014 by ASTM.


Zheng S.,University of Shanghai for Science and Technology | Zheng S.,Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components | Deng X.,University of Shanghai for Science and Technology | Feng J.,University of Shanghai for Science and Technology | And 3 more authors.
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2016

How to select the appropriate target spectrum for iterative test is a key point to vehicle indoor road simulation testing, The conventional selecting method is to select the median fatigue damage spectrum as the target spectrum. Therefore, the method of selecting the minimum standard deviation spectrum as the target spectrum is introduced in this paper based on the load spectrum measured in proving ground. To verify the validness of this methodology, analyses and comparison between the two methods are conducted from numerical statistical analysis, rain-flow cycle damage distribution, shock response spectrum and fatigue damage spectrum. The results indicate that the minimum standard deviation spectrum is better than the median fatigue damage spectrum. Finally, the result of vehicle indoor road simulation test shows the methodology is right. © 2016, Journal of Mechanical Strength. All right reserved.


Zheng S.,University of Shanghai for Science and Technology | Zheng S.,Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components | Deng X.,University of Shanghai for Science and Technology | Feng J.,University of Shanghai for Science and Technology | And 2 more authors.
Jixie Qiangdu/Journal of Mechanical Strength | Year: 2015

Based on the torsion beam rear axle, the parameters of entire vehicle are analyzed by ADAMS. The result show that the rear axle load is the most significant factor for vertical force amplitude at wheel center. The relationship between vertical force amplitude and displacement amplitude at wheel center are analyzed by Hyper Works. The result show that that the rear axle load is the most significant factor for displacement amplitude at wheel center. By summarizing the existed fatigue test examples for torsion beam rear axle, the relationship is established mathematically between rear axle load and the displacement of torsion beam rear axle. According to the above analysis, the general fatigue test specification for torsion beam rear axles is established. The effectiveness of the new test specification is verified by comparing with old test specification. © 2015, Journal of Mechanical Strength. All right reserved.

Loading Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components collaborators
Loading Machinery Industry Key Laboratory for Mechanical Strength and Reliability Evaluation of Auto Chassis Components collaborators