Papers by Keyword: Nonlinear Contact

Abstract: The mechanics model about submarine pipelines during installation is based on the theory of geometrical nonlinear great distortion. The U.L method is adopted as solving problem about the contact between submarine pipeline and seabed, the results obtained by this method are equally accurate and less computational work is need when solving pipeline’s non-linear great distortion. According to select different original parameter during laying pipeline, the bend distortion to submarine pipeline is calculated and the effect of bend distortion to submarine pipeline is analyzed.

Abstract: Based on analysis on steel-concrete interface of a hybrid self-anchored suspension bridge, the shear distribution of shear studs under load and influence of contact friction on steel-concrete interface are studied in this paper. The results show the existence of friction reduces the stress of shear studs, but not affects the performance of box girder and shear studs under load, and the vertical stress of shear studs in steel-concrete joint is increasing with the space of neutral axis.

Abstract: By using ANSYS software, the finite element model of the foundation for wind turbine generator system is built. On the basis of concrete elastoplastic constitutive, the non-linear contact between the foundation stub, a steel part, and foundation concrete is introduced, the internal mechanical characteristics and law of the foundation which is under the influence of wind with unfixed direction are researched on. The interaction state is attained. The numerical analysis considering the contact status and material nonlinearity is more reasonable and the research results offer scientific basis for the domestic autonomous designing and optimizing.

Abstract: The three-dimensional finite element numerical model of foundation for wind power generator unit is created by use of ANSYS. The elastic-plastic constitutive is introduced and the nonlinear contact is set up between the foundation stub and concrete. Impact of step height on deformation of foundation is researched, the deformation characteristic and law of concrete foundation is discussed and It’s more rational to consider the contact status and material nonlinearity. The research results offer scientific basis for design and optimization on foundations of wind power generator system.

Abstract: This paper puts forward the method of establishing the accurate 3D model of involute gear and imports the model to MSC.Patran to mesh the grid. The stress distribution is simulated by applying the MSC.Marc to solve the nonlinear contact problem. It is a quick and accurate method to analyze the gear contact strength.

Abstract: The three-dimensional finite element numerical model of wind power generator unit is created by using ANSYS. The elastic-plastic constitutive is introduced and the nonlinear contact is set up between the foundation stub and concrete. The different reinforcement arrangement’s impact on structure is researched, the strength characteristic and law of reinforcement concrete is discussed and a more rational scheme is raised. It’s more rational to consider the contact status and material nonlinearity. The research results offer scientific basis for design and optimization on foundations of wind turbines.

Abstract: In order to determine the loads acting on the cutterhead of a compound shield, this paper aims at the large-scale and fully coupled system of the excavation face. Firstly, a new model is proposed to calculate the loads acting on a single cutter, in which the earth pressure of the chamber is taken into consideration. Then, by transforming the large-scale nonlinear contact problem into a smaller one, we set up the governing equations only including the penetration depth of cutters in the approach of the sub-structure condensation, to calculate the loads acting on the cutterhead. Finally, the relationship between the penetration per revolution and the total thrust and total torque acting on the cutters of the cutterhead of a compound shield is investigated.

Abstract: ANSYS finite element software was utilized to simulate contact non-linear finite element analysis of chain connector for enhancing the structure strength and working life and productivity and manufacture craftwork of the existed ladder-type chain connector. Static and dynamic experiments were carried on several samples to test the broken positions of the chain connectors. The simulation results show that the main part of stress concentration is in teeth roots; experimental results also show that the teeth roots are the fragile parts in the chain connector. So experimental results conform to the results of simulation, it is reasonable for the simulation of contact non-linear finite element analysis of chain connector by ANSYS software. Then a structure of cambered surface tooth is promoted to enhance the strength and life of teeth parts, and petal-type clamps structure is adopted, that can carry out volume-producing to improve the productivity and processing precision.

Abstract: A special specimen was created cutting a rectangular notched area from the surrounding of the upper left corner of a wide body aircraft door. Then a fatigue traction load was applied in order to induce an MSD crack initiation and propagation. An innovative DBEM (Dual Boundary Element Method) modelling approach was devised, capable of explicitly modelling the different test article layers with their rivet connections even in a 2d approach. The rivets that are close to the propagating crack are coupled with the corresponding holes by non linear contact conditions, and the accuracy improvements are assessed in comparison with a previous linear analysis, in which traction and displacements continuity conditions on the hole-rivet interface had been imposed. The importance of such influence on the simulation precision need to be assessed due to the strong impact that a non linear analysis produces on computational times. For such a complex problem (three different panels, made of different materials, each one with a variable thickness and connected by numerous rivets), experimental crack propagation data were available for the numerical-experimental comparison. With such non linear approach, a significant improvement on the growth rate correlation is obtained, that justify the increased computational effort.