Finite Element Analysis Report

DN1650 4-flange Dismantling Joint

Purpose of the report:

Analyze the usage of the product before the finite element test:

1. During the use of the pipeline, the pipeline compensation joint is connected to the valve and the pipeline by using double-ended studs. Therefore, it is necessary to analyze the force of the force transmission joint after the complete installation. We regard the flange bolts as complete fixed point,

2. According to the way it is used, the axial stress of the pipe is affected by many factors, such as the medium flow rate, flow state, and the flatness of the pipe wall, etc., so here we do not do stress analysis on the dynamic load of the force transmission joint; To sum up: We need to do static load analysis of the internal radial uniform force of 1.1MPa on the force transmission joint after the flange is fixed, and obtain the stress, deformation and safety factor results of the force transmission joint under the condition of external force.

Finite element analysis accessories:

Figure 1: Material mechanical property parameter table of material GGG50 (QT500-7)

English translation of figure 1

Figure 2: Fixture position during finite element analysis

Figure 2: Load position during finite element analysis

Figure 3: Meshing during finite element analysis

Figure 4: Stress distribution during finite element analysis (maximum stress and minimum stress)

Figure 5: Deformation during finite element analysis (maximum and minimum deformation)

Figure 6: Factors of Safety (Maximum and Minimum Factors of Safety) in Finite Element Analysis

Finite element analysis conclusion:

1、Comprehensive analysis of the data analysis of stress and safety factor in Figure 4 and Figure 6 shows that within the tolerance range of the material QT500-7 yield strength, the minimum safety factor is 6.3, which meets the minimum allowable stress in its use, so the strength is completely Meet the requirements of its working conditions;

2、Comprehensive analysis of the maximum deformation in Figure 5 is 0.12mm. The maximum deformation of this item is the joint between the flange tube and the telescopic tube. Since only the connecting flange is regarded as a fixed point in the analysis, according to the working conditions and product structure, The reinforcement ring is also interspersed with studs, and the actual situation is that when the bolt strength is sufficient, the deformation here will be controlled structurally, so the elastic deformation within the yield strength of the material meets its product use function;

In summary: The design model of the DN1650 4-flange Dismantling Joint is qualified.

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