Search results

Fatigue Life of Taper Roller Bearings in Drive Rear Axle Main Gear Reducer Yongqi Zhang 1, a,Qingchang Tan 1,b, Jiangang Li 1,c, Kuo Zhang 1,d 1College of Mechanical Science and Engineering,Jilin University, Changchun China a110063927@qq.com, btanqc@jlu.edu.cn, c330481236@qq.com, dZhangkuo1104@163.com Keywords: Finite element, Taper Rolling Bearing, Stress ,Fatigue Life Abstract.
Taper roller bearings are important parts of drive rear axle main gear reducers, and their work property affect behavior of the reducers.The roller bearings are obtained under applied load and inertia force that affects both meshing contact of the gears and raceways of the bearings.
Introduction The lives of taper roller bearings bearings are one of the main factors which decides behavior of the drive rear axle main gear reducers .therefore increasing the fatigue lives of taper roller bearings, ensuring the normal operation of bearings running, predicting before failure in the work have an important economic value[1][2].
From the table, the contact stress produced by the pre-tightening is small; the stress caused by radial load is larger than one produced by axial load; the inertial force affects evidently the contact stresses between the roller with inner and outside raceways.
A study of sliding between rollers and races in a roller bearing with a numerical model for mechanical event simulations.

Rubber processing analyzer and Thermogravimetric Analyze the difference between the properties of dry rubber and vulcanized rubber produced by Micro-cut Tapping with Gas-stimulation.
It was indicated that control sample spresent higher molecular weight and mechanical properties.
Plasticity retention index (PRI) of micro-cutting samples was higher than that of control, which was an evident to better properties such as anti-oxidation and anti-aging.
Figure 5 shows that the loss modulus of the rubber material by Micro-cut Tapping with Gas-stimulation is smaller than control, and it has good heat aging properties.
Micro-cut Tapping with Gas-stimulation technique affected the flow properties of natural rubber molecules.

They investigated the influence of carbon nanotubes (CNT) on the mechanical properties of stabilized soil.
The obtained results indicated that a very small content of CNT improved the mechanical properties of a soil chemically stabilized with cement.
Table 4 summarizes these factors along with their values.
Dehkhodarajabi, Effect of graphene oxide nanosheets on the geotechnical properties of cemented silty soil, Archives of Civil and Mechanical Engineering 16(4) (2016) 695-701
Gun’ko, Small but strong: a review of the mechanical properties of carbon nanotube–polymer composites, Carbon 44(9) (2006) 1624-1652

If dissolution of metals takes the essential role in the stress corrosion cracking concerned, cracking susceptibility is expected to be significantly affected by dielectric constant of water.
The cracking has been caused by sensitization in welding heat affected zones due to Cr depletion along grain boundaries [1].
To solve the SCC problem, a great number of studies about SCC mechanism on stainless steels in high temperature water have been done from the points of view of material, mechanical, and environment [2].
However, there have been no studies about SCC mechanism focusing on physical property of water.
Sakaihara: Key Engineering Materials, Vol.261-263(2004), 1031-1036 [4] Release on the IAPWS Industrial Formulation 1997 for the Thermodynamic Properties of Water and Steam, IAPWS (The International Association for the properties of Water and Steam), (1997)

The microstructure and phase composition of powder, as well as the microstructures, morphologies, optical properties, densities and mechanical properties of synthetic ceramics were investigated.
Nano-ceramic materials exhibit many processing and property advantages over conventional coarse grained alternatives such as the improved mechanical properties [9].
The physical properties of synthetic nano-ceramics have been analyzed, and their mechanical properties, specifically toughness, have been probed with nanoindentation [19].
The nano-mechanical properties of ceramic samples were tested by nanoindentation.
Mechanical properties.

The research object was to use analytical models to develop a quantitative understanding of the affections in different situations on the dispersion properties.
Among all the factors, the interface failure was dominant.
As we all know, ultrasonic method was an effective approach for detecting the disbond defects, Ultrasonic waves interacted with the interfaces in a complicated way on the propagation path, and the propagation properties could be changed by the interfaces.
Results and discussion In this paper, the steel/ adhesive layer/insulation structure was took as the object which was usually used in the rocket, the influence of all factors on the dispersion properties of adhesive bonding structures was computed which included interface failure, cohesive strength failure, mixed failure and other elements.
Thus the evolution regularity was strongly depended on the properties and plying manner, different materials and structures had different rules.

Parametric uncertainties of induction motors affect the control performance.
The main uncertainties are caused by slowly time-varying factors, which are thermal variations and load torque disturbances, in general.
The accuracy of the rotor resistance affects the orientation of current vectors with flux vectors.
It may reduce the torque and affect the output performance, or generate an incorrect flux level.
For verifying the stability of the observer and the estimator with the passivity theorem, passive properties of each block should be analyzed.

Tunnel mechanics mainly depend on joints properties in layered and jointed rock mass, and most of the present methods adopted in numerical analysis are distinct element method.
An orthogonal design of uniaxial compression tests was simulated on eighteen groups of jointed rock specimens having different geometric and mechanical properties using RFPA2D (Rock Failure Process Analysis) code in [5].
In order to study on the effect of joints on tunnel mechanics, three factors including dip and thickness of joints and lateral pressure coefficient are considered in the finite element model.
Combining to the Gaixiaba tunnel, considering the jointed properties such as dip angles, distances and lateral pressure coefficient, the finite element models are made.
Numerical investigation on the sensitivity of jointed rock mass strength to various factors.

These mortars, due to their esthetical properties, can satisfy not only traditional properties but also decorative aspects for fair-faced masonry finishes.
The increase in solar reflectivity is one of the most important factors that help in reducing the heat flow into buildings [13].
Factors affecting solid waste recycling in Egypt.
Enhanced physical, mechanical and microstructural properties of lightweight vermiculite cement composites modified with nano metakaolin.
Thermo-physical, mechanical and microstructural properties of cementless lightweight mortar.

The performance of concrete is of paramount importance for the structural longevity, relying on numerous factors [7].
Luhar, Effect of wastewater on properties of concrete, J.
Zhutovsky, The effect of external curing methods on the development of mechanical and durability-related properties of normal-strength concrete, Constr.
Wu, Factors affecting the effectiveness of internal curing: A review, Constr.
Xi, Influence of wastewater content on mechanical properties, microstructure, and durability of concrete, Build. 12 (2022) 1343