An Integrated System for Dynamic Stress and Fatigue Life Prediction of Vehicle Components

1995 ◽  
Author(s):  
Hong Jae Yim ◽  
Sang Beom Lee ◽  
Jakyum Koo ◽  
Sungkuk Jang
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Dynamic Stress ◽  
Integrated System ◽  
Fatigue Life Prediction ◽  
Vehicle Components

Computational Fatigue Life Prediction of Welded and Non-welded Ground Vehicle Components

1987 ◽  
Author(s):  
R.I. Stephens ◽  
B. Dopker ◽  
E.J. Haug ◽  
W.K. Baek ◽  
L.P. Johnson ◽  
...  
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Ground Vehicle ◽  
Vehicle Components

Vehicle Dynamic Analysis and Fatigue Prediction

2012 ◽  
Vol 157-158 ◽  
pp. 1025-1030
Author(s):  
Jia Shiun Chen ◽  
Hsiu Ying Hwang
Keyword(s):  
Fatigue Life ◽  
Dynamic Simulation ◽  
Life Prediction ◽  
Traditional Approach ◽  
Fatigue Life Prediction ◽  
Dynamic Simulations ◽  
Production Development ◽  
Dynamic Forces ◽  
Vehicle Components ◽  
Body Dynamic

This research was to predict the life of vehicle components on an uneven random road. Flexible-body dynamic simulation was used for dynamic simulation and stress recovery. Based on the stress obtained from dynamic simulation, a fatigue life prediction was implemented. This process combined dynamic simulations and finite element analyses (FEA), including the interaction between dynamic forces and structure deformation. Comparing with traditional approach, dynamic and FEA calculation performed in sequence and separately, the proposed process could obtain more accurate structure stresses and better fatigue life prediction. With that, the production development time and cost could be significantly reduced.

Integrated Computational Durability Analysis

1993 ◽  
Vol 115 (4) ◽  
pp. 492-499 ◽  
Author(s):  
W. K. Baek ◽  
R. I. Stephens ◽  
B. Dopker
Keyword(s):  
Finite Element ◽  
Fatigue Life ◽  
Life Prediction ◽  
Dynamic Stress ◽  
Local Strain ◽  
Fatigue Life Prediction ◽  
Dynamic Loads ◽  
Finite Element Stress Analysis ◽  
Multibody Dynamic ◽  
Crack Initiation Life

A computer aided analysis method is described for durability assessment in the early design stages using multibody dynamic analysis, finite element stress analysis, and fatigue life prediction methods. From multibody dynamic analysis of a mechanical system, dynamic loads of a mechanical component were calculated. Finite element stress analysis with substructuring techniques produced accurate stress fields for the component. From the dynamic loads and the stress field of the component, a dynamic stress history at the critical location was produced using the superposition principle. Using Neuber’s rule, a local strain time history was produced from the dynamic stress history. The local strain based fatigue life prediction method was then used to predict “crack initiation” life of the critical component. The predicted fatigue crack initiation life was verified by experimental durability tests. This methodology can be combined with identification of weak links and optimization techniques such that the design optimization for an entire mechanical system based upon durability is possible during the early product development stage.

scholarly journals Literature Overall of Fatigue Analysis Approaches of Vehicle Components Made of Rubber

2020 ◽  
Vol 5 (2) ◽  
pp. 130-140
Author(s):  
Veronika Tomposné Szüle
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Fatigue Behavior ◽  
High Viscosity ◽  
Fatigue Life Prediction ◽  
Elastic Behavior ◽  
Fatigue Properties ◽  
Temperature Changes ◽  
Influence Of Temperature ◽  
Vehicle Components

Generally, the most frequently used structural materials are metals which have high strength and stiffness. However, there are many cases when other important properties come to the front, as well as high deformation capacity with elastic behavior, high viscosity namely good damping effect. Due to its above mentioned properties, rubber is widely used in vehicle and automotive industry. Vehicle components made of rubber usually exhibit large deformations. Cyclic finite deformations generate temperature in hyperelastic materials. Furthermore it is necessary to take into consideration the effects of ambient temperature. The mechanical properties of rubber depend on temperature and temperature changes can accelerate chemical alteration processes which lead to the material deterioration and fatigue processes. Research on fatigue behavior and fatigue properties of rubber has a great significance for predicting fatigue life and improving durability of rubber products. There are several studies on the fatigue behavior of rubber-based materials, but there is less research in the fatigue life prediction considering the influence of temperature and temperature changes. First purpose of this paper is summarizing the influence of temperature and temperature changes on the fatigue behavior of rubber. The second purpose of this study is to provide an overview of the state of the art on the fatigue life prediction of rubber with primary focus on the different methods available for prediction of fatigue life under the influence of temperature and temperature changes.

Dynamic Stress Analysis Method and Its Application for Urethane Wheels Using the Computer Model

2006 ◽  
Vol 321-323 ◽  
pp. 1601-1604
Author(s):  
Kab Jin Jun ◽  
Ji Won Yoon ◽  
Tae Won Park ◽  
Joong Kyung Park
Keyword(s):  
Fatigue Life ◽  
Life Prediction ◽  
Dynamic Stress ◽  
Fatigue Life Prediction ◽  
Design Stage ◽  
Analysis Method ◽  
Early Design Stage ◽  
Multibody Dynamic ◽  
Dynamic Stress Analysis ◽  
Damage Rule

An Over Head Transportation (OHT) vehicle is used to transport large loads in a factory more efficiently. To maximize productivity, the speed and load requirement for the OHT vehicle is continually increasing. This may create a repetitive dynamic load and thus cause fatigue failure in related components. In this paper, a computer aided engineering (CAE) method is proposed for fatigue life prediction in the early design stage using multibody dynamic analysis and the linear damage rule. The process of predicting the fatigue life using the proposed computer models in this paper may be applied to structures of various mechanical systems.

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