Accounting for microstructure sensitivity and plasticity in life prediction of heavily loaded contacts under rolling contact fatigue
01 Mar 2020-Fatigue & Fracture of Engineering Materials & Structures (John Wiley & Sons, Ltd)-Vol. 43, Iss: 3, pp 539-549
About: This article is published in Fatigue & Fracture of Engineering Materials & Structures.The article was published on 2020-03-01. It has received 8 citations till now.
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TL;DR: In this paper , the impact of induction hardening residual stresses in rolling contact fatigue lifetime is investigated experimentally and numerically using the Dang Van multiaxial criterion, and various residual stress fields are simulated using the finite element method and are mapped into a classical mono-contact finite element model.
10 citations
TL;DR: In this article , a quasi-static model of deep groove ball bearings is developed under the combined angular misalignments and external loads, and the model also considers the weakening effects of the rib of the raceway on the contact force.
Abstract: Abstract Due to the uncontrollable factors in the installation process, the angular misalignments of the inner and outer races may exist in deep groove ball bearings. In order to analyze the performances of bearings with misalignments, a quasi-static model of deep groove ball bearings is developed under the combined angular misalignments and external loads. In this model, considering the different cases of the combined angular misalignments, the time-invariant or time-varying abnormal preload caused by the misalignment is calculated. The proposed model also considers the weakening effects of the rib of the raceway on the contact force, which makes the proposed model more practical than the traditional model. Based on the proposed model, the contact characteristics of the bearing are analyzed. The results show that the misalignment angle and the radial load greatly influence the contact characteristics, and the rotational speed significantly changes the friction force.
4 citations
TL;DR: In this paper , a dynamic model of cylindrical roller bearing (CRB) was developed to improve the endurance and reliability under complex operating conditions, and the model incorporates roller-raceway contact model to optimize roller profile and is further verified with published data.
Abstract:
To improve the endurance and reliability of cylindrical roller bearings under complex operating conditions, a dynamic model of cylindrical roller bearing (CRB) is developed. The model incorporates roller-raceway contact model to optimize roller profile and is further verified with published data. Systematic parametric analyses are conducted to investigate the influence of flange angle, roller-end sphere radius and roller profile on load distribution, roller tilt, roller skew and contact performance. The results suggest that high flange-roller contact location and contact stiffness can effectively extend fatigue life of the bearing, while low flange-roller contact location can reduce the heat generation. In addition, roller profile has negligible effect on load distribution, but an optimized roller profile can improve the anti-tilt capacity. The developed model provides a tool for the internal design and frictional loss optimization of CRB under combined loads.
1 citations
TL;DR: Wang et al. as mentioned in this paper proposed a rolling bearing life prediction method based on deep learning and voice interaction technology, and the experimental results showed that the designed prediction method can effectively improve the life prediction rate.
Abstract: Rolling bearing life is an important index to measure the performance of rolling bearing. Therefore, a rolling bearing life prediction method based on deep learning and voice interaction technology is proposed. Bearing vibration signals are extracted from time domain and frequency domain, and PRA data dimension reduction algorithm is used. On the basis of in-depth learning algorithm and voice interaction technology, support vector machine is introduced to generate prediction probability density function, and the residence time of bearing running state is calculated. The degradation state of the bearing is deduced by using voice interaction technology, and the life expectancy of the bearing is calculated to realize the life prediction of the bearing. The experimental results show that when the vibration intensity reaches 12 mm/s, the rolling bearing has been removed. When the vibration intensity reaches 11 mm/s, the rolling bearing life test is regarded as the end of rolling bearing life. The error data of the experimental group was less than that of the control group, and the improvement rate was 19.5%. It is further proved that the designed prediction method can effectively improve the life prediction rate.
1 citations
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418 citations
TL;DR: In this paper, the problem of the calibration of the Dang Van multiaxial fatigue criterion is addressed based on uniao-ial fatigue tests performed with different stress ratios, and a different fatigue failure locus made of two straight line segments is proposed and typical three-dimensional rolling contact stress histories are analyzed using the traditional and proposed methods.
107 citations
TL;DR: In this article, specific numerical methods for the computational analysis of damage induced in rail by repeated rolling are presented, and the calculations of mechanical stabilized states (shakedown, ratchetting) of rail-like structures subjected to moving contact loads are performed using the stationary methods.
81 citations
TL;DR: In this article, the problem of estimating the material fatigue properties for assessing real mechanical components was addressed, and some practical rules were proposed to estimate the fully reversed plain fatigue limit, Δσ 0, using the material tensile stress.
Abstract: This paper addresses the problem of estimating the material fatigue properties for assessing real mechanical components. Initially, some practical rules are proposed to estimate the fully reversed plain fatigue limit, Δσ 0 , using the material tensile stress. These rules are obtained by subdividing materials into five different groups: carbon steels, low-alloy steels, high-alloy steels, aluminium alloys and cast irons. Subsequently, using a large database of fatigue data found in the literature, it is demonstrated that the fully reversed torsional plain fatigue limit can be directly estimated from the fully reversed uniaxial plain fatigue limit by simply using Von Mises' formula. Finally, some empirical equations are proposed to estimate El Haddad's short crack constant, a 0 . These equations are based on the assumption that this material property can be derived from the plain fatigue limit determined at a given load ratio, R. Since the a 0 values depend on the load ratio, so a 0 versus Δσ 0 relationships can directly account for the R influence. The aim of this paper is to provide engineers engaged in assessing real structural components with empirical rules to estimate the material fatigue properties. All these pieces of information are needed to apply the most modern methods suitable for assessing components weakened by any kind of geometrical feature and subjected to any kind of fatigue loading.
74 citations
TL;DR: In this paper, the authors evaluated the life prediction accuracies of the Lundberg-Palmgren and loannides-Harris methods by comparing lives calculated according to these methods and to those actually experienced in 62 different applications.
Abstract: Ball and roller bearings are designed to meet endurance requirements basically determined according to the Standard fatigue life calculation method This method is based on the Lundberg-Palmgren fatigue life theory as modified by reliability, material, and lubrication factors As application load and speed requirements have increased, the Lundberg-Palmgren method has resulted in bearings of increased size, adding unnecessarily to the size and weight of mechanisms This is a critical design situation for weight and size-sensitive components such as aircraft gas turbine engines and helicopter power transmissions The bearing life prediction method developed by loannides and Harris recognizes the existence of a fatigue limit stress If the stresses an operating bearing experiences do not exceed the limit stress, the bearing can achieve infinite life In any case, the method tends to predict longer lives than the Lundberg-Palmgren method This paper evaluates the life prediction accuracies of the Lundberg-Palmgren and loannides-Harris methods by comparing lives calculated according to these methods and to those actually experienced in 62 different applications As a result of the investigation, the loannides-Harris method is shown to more accurately predict bearing fatigue endurance
73 citations