Papers by Keyword: Stress

Abstract: Owing to the problem of week strength, tripping and bad sealing of the hollow sucker rod joints, we designs a new sucker rod joint, which has two kinds of prototypes, including tapered shoulder and round shoulder. The hollow sucker rod’s characteristic is easy disassembling, multiple sealing, and also has a large contact area of the shoulder. By using the method of finite-element analysis, we set up the finite-element model and analyze the contact stress and deformation distribution of two kinds of structure in different friction coefficients. Through the analysis, we find not only the bearing capacity of the circular arc shoulder joint, but also the sealing is also better than the tapered shoulder's joint. And for both kinds of joints, the friction coefficient is an important factor to affect the pretightening force.

Abstract: Through simulation analysis of the blood cell by Abques under the function of the different pressures, the change of the cell’s axial diameter and the importance of the effect of external force and double concave shape on the erythrocyte’s deformability are obtained. It lays the foundation for the research artificial organs lubrication.

Abstract: According to the factual demand of produce, some corporation wants to enlarge the capacity of the idle from 65t to 75t. This paper aims at the changing ladle which the capacity is 75t. It makes research to the iron ladle's promotion process and stress analysis. This paper uses ANSYS-Workbench software to make the finite element analysis of the iron ladle and extracts the largest stress, strain and the location. Then this paper analyses whether the changing ladle can be fit for the intensity demand or not so that it could provide the important theory gist to the corporation

Abstract: Aimming at the main failure modes such as the metal saw blade wearing and tearing too fast and short working life, this paper researched the influence of the vertex angle to the stress and it’s distribution using ANSYS. On the basis of static analysis, taking smaller stress and reasonable distribution as destination, the optimal vertex angle is obtained.

Abstract: Stress and deformation analysis of 950 mill housing was done by means of ANSYS to calculate the maximum stress and deformation. Strength and stiffness of the mill roll were checked to meet requirements. The weakness was revealed of the structure for the mill housing, and it is significant for similar mill housing designs.

Abstract: The characteristics and causes of the formation of adiabatic shear bands (ASB) in 30CrMnMo armor steel plate are analyzed by shooting 93W projectiles. The results show that adiabatic shear bands do not occur in the initial stages of the opening-crater and plugging. Adiabatic shear bands distributed sparsely appear in the stable penetrating phase because of the necessary strain volume. Adiabatic shear bands are formed along main shear stress lines at an angle of about 450 in relation to the penetrating direction. These are approximately consistent with the direction of the plastic deformation slip line. The non-homogenous deformation and centralizing of stress and strain inside the adiabatic shear band causes micro-cracks and micro-bores during cooling of the plate.

Abstract: Widening of existing highway embankments can improve their capacities and ease the high traffic pressures, but it may cause a series of engineering problems including longitudinal pavement cracks, drop off or even local or global instability of embankments especially those on soft soils. How to prevent severe cracks occurring on pavement induced by widening of the existing embankments has been a great concern of geotechnical engineers. A numerical analysis by using a commercial FEM program was conducted to investigate the influence of the thickness of foundation soils on the development of transverse stress in the pavement of the existing and widened embankments. The effect of widening time on the stress was also discussed. The results indicate that compressive stress will be caused in the existing pavement prior to the widening, while considerately lager tensile stress will be induced in the existing pavement after widening. In the view of reducing pavement tensile stress, a most suitable time to begin widening was proposed for engineering practice.

Abstract: In order to study the performance of asphalt pavement with function layer under temperature-load coupling action, the thickness of surface layer, the module of surface layer and was analyzed to abtain their influence on the function layer stress using the finite element method. The results clearly indicated that it is very effective to prevent the reflection crack by increasing the thickness of asphalt surface layer and it is not obvious to reduce the reflection crack through enhancing the module of asphalt surface layer.

Abstract: The deformations and stresses of a concrete face rockfill dam (CFRD) for dam construction and reservoir impoundment were simulated by the element add/remove technique of ABAQUS. And, the sensitivity analysis of main parameters of the Duncan-Chang E-B model was carried out by the method of univariate sensitivity analysis and the critical sensitivity parameters of the deformation and stress on the CFRD were obtained. This research has some guidance and reference for future similar projects design and monitoring.

Abstract: Soft rock roadway is one challenge of roadway support. With plastic state, it has a certain bearing strength, and its large plastic performance must release out in some form. Therefore soft rock roadway is not a single support effective, it must use a joint way. By numerical simulation, this paper analyzes uniform diffusion of bolt mesh support to wall rock stress, which provides a theoretical basis for bolt mesh support of soft rock.