How to use the finite element analysis method to study the internal stress of springs?

The core tip: the spring finite element analysis method, although the country with high spring technology level has been applied, although China has the technical development in this respect, it has not yet formed a practical model. In addition, the optimal design is also introduced in the spring design process. The structure of the spring is relatively simple, and its function is simple, which affects the structure and performance parameters.
The spring finite element analysis method, although the country with high spring technology level has entered the practical application, although China has the technical development in this respect, but it has not yet formed a practical model. In addition, the optimal design is also introduced in the spring design process. The structure of the spring is simple, the function is simple, and the parameter of the structure and performance is less. So the designer has used the analytic method, the graphic method or the graphic analysis method to find the optimal design plan very early, and has made some achievements. With the development of computing technology, a series of analysis and design techniques used to ensure the reliability of the products are designed to ensure the reliability of the designed products. The function of the design is to make the designed products on the basis of predicting and preventing the possible occurrence of the product. To the specified reliability target value is a complement and improvement of the traditional design method.
It is shown that the stress is compared with the existing design method and the finite element method. For the same structure of the spring, under the action of the same load, it can be seen from the diagram that the stress of the high stress spring with less effective ring or larger spiral angle is more different from the two methods. This is because with the increase of helical angle, increase load eccentricity, so that the spring diameter or lateral deformation is larger, so the stress is larger. The existing design calculation method can not be accurately reflected, and the finite element method can accurately reflect it.
Spring design has made some progress in the use of reliability technology, but further improvement requires the development and accumulation of data. With the development of computer technology, various versions of the spring design program have been compiled at home and abroad, which provide the convenient conditions for the hardware spring technicians to develop and innovate. The development of arc clutch spring and drum suspension spring with difficult design is accomplished by using the design program.
With the development of spring application technology, designers have also put forward many new problems that need attention and solution. For example, the influence of material, pressure and shot peening treatment on fatigue and relaxation properties is difficult to calculate accurately in design, and it is determined by experimental data. If the number of coils is calculated according to the current design formula, the stiffness of the spring is smaller than the design stiffness, and the effective number of coils should be reduced to meet the design requirements. At present, the design trend of mass production products takes the maximum working shear stress and fatigue life requirements as an example.

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