Stodal Analysis Of Mono Goal Leaf Spring

1942 Words 8 Pages
CHAPTER- 5
ANALYSIS OF STEEL LEAF SPRING
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The aim of this analysis is to study the multi-leaf steel leaf spring under loading conditions and verify those results within the allowable limits. ANSYS software is used to analyze the stresses and strains by performing static analysis for the given leaf spring specifications and modal analysis is performed to determine the natural frequencies and mode shapes to asses the behavior of the leaf spring with various parametric combinations.
After prepared the model of the leaf spring by specifications it has to be subjected to analysis in ANSYS Workbench. Analysis involves meshing, giving boundary conditions and loads. However for modal analysis
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FIG.15Total deformation of Mono Composite Leaf Spring
The fig: 16 shows the von-mises stress at different positions of the leaf spring and it varies from 0.0097MPa to 40.66MPa FIG.16 Von-Mises Stress Plot of E-Glass/Epoxy Composite Leaf Spring
6.1.4 Modal Analysis
Modal analysis is performed to determine the natural frequencies and mode shapes of the leaf spring.
After the post processing, from solution options, new anaysis is selected as modal. The analysis can be performed by Block Lancos method or Subspace method. The subspace method is selected. In the next step select the no. of modes to extract and expand are taken as 5. From the modal analysis results, it is found that the first six natural frequencies of E-Glass / epoxy mono composite leaf spring are 127.56Hz, 182.88 Hz, 328.05 Hz, 360.46 Hz, 613.62 Hz and 673.33 Hz
The fig.17 shows the mode shape at a natural frequency of 127.56Hz FIG.17 Total Deformation Plot for 1st Natural Frequency

The fig.18 shows the mode shape at a natural frequency of 182.88 Hz FIG.18 Total Deformation Plot for 2nd Natural Frequency
The fig.19 shows the mode shape at a natural frequency of 328.05
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After the model is created, select the analysis as modal analysis. The subspace method is selected. In the next step select the no. of modes to extract and expand as 6. Then the problem is solved. From the modal analysis results, it is found that the first five natural frequencies are 278.41Hz, 290.55 Hz, 514.11 Hz, 820.95 Hz, 939.77 Hz and 1285.2 Hz

The fig.35 shows the mode shape at a natural frequency of 278.41Hz Fig.35. Total Deformation Plot for 1st Natural Frequency

The fig.36 shows the mode shape at a natural frequency of 290.55 Hz Fig.36 Total Deformation Plot for 2ndnatural Frequency
The fig.37 shows the mode shape at a natural frequency of 514.11 Hz Fig.37 Total Deformation Plot for 3rd Natural Frequency
The fig.38 shows the mode shape at a natural frequency of 820.95 Hz Fig.38 Total Deformation Plot for 4th Natural Frequency
The fig.39 shows the mode shape at a natural frequency of 939.77 Hz Fig.39 Total Deformation Plot for 5th Natural Frequency
The fig.40 shows the mode shape at a natural frequency of 1285.2 Hz Fig.40 Total Deformation Plot for 6th Natural

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