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In order to solve the problem of failure mechanism of fiber reinforced composite with notch, the surface displacement of composite material in tensile test was digitally processed by digital image correlation method. Hashin improved criterion was embedded into ABAQUS / Explicit by subroutine VUMAT. The model of the composite specimen with damage was established, after which the simulation of the tensile...
The numerical simulation on welding process of simple structure in the paper, there are many problems have been handed. for example moving heat, latent heat of phase change and characteristic parameters of materials reduce nonlinear analysis and improve the efficiency by indirect method to calculate constructive field. ANSYS software was applied to analyze temperature field and stress field of welding...
DEFORM-3D software is a powerful simulation tool that uses the Finite Element Method to analyze the three dimensional complex forging process, It provides a virtual testing environment in which engineers can study the influence of geometric parameters, process parameters and other factors on forging process performance. This paper aims at the forging process of automotive starter motor ring gear,...
As a new tunnel structure form, double-arch tunnel is placed on the research stage at home and abroad. Since the stability of surrounding rock and its strain-stress have close relationship with the lining structure function appearance, the reliabilities of the support's design parameters as well as the working procedure, the stress and displacement in the surrounding rock during different working...
Tunnel excavation design is an important content in the civil engineering, many researches are done based on the linear failure criterions by the analytical solution and numerical solution, but seldom researches are done to apply the nonlinear failure criterion in describing the surrounding rock mass after tunnel excavation, although nonlinear failure criterion shows great advantages over the linear...
Based on the experimental results of 12 steel fiber reinforced concrete corbels, the numerical simulation by nonlinear finite element method was adopted to analyze their behaviors and to explore the influence of steel fiber volume ratio, the shear span to depth ratio and the strength of concrete on the shear behaviors, crack and deformation of concrete corbels. The results indicate that the shear...
The impact analysis was done to precise bolt FE model by explicit software LS-DYNA. The bolt simple model was created using anisotropic material and plastic strain damage rule based on anterior calculated results. With same boundary conditions, the stress and strain results of precise and simple model were compared and simple model material parameters were improved based on models difference. The...
This paper deals with modeling and control of offshore pipelay operations from a dynamically positioned surface vessel where a nonlinear dynamic beam formulation in three dimensions capable of undergoing shearing, twist and bending is used to model the pipe. This pipe model is coupled with a nonlinear vessel model that has been adopted as a standard for vessel control design and analysis purposes...
Analyzed the deformation, internal forces and stress of throttle slice of shock absorber by elastic mechanic, the formula of the minimal permission thickness of single design throttle slice was established, and the slice stress coefficient and analytic formula were found through the relation with the deformation. Followed is a practical example for radial, circumferential and combined stress computation...
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