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LOAD & sTRESS CALCULATIONS

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Simplified Procedure for Approximate Load Calculations
Simplified Procedure for Approximate Load Calculations
Dynamic loading of disc springs occurs when the load continuously changes from preload to final load.
Disc Spring Stress Calculations
Disc Spring Stress Calculations
For evaluation of compressive stress, use formula S1. It compute the compressive stress at the upper inner diameter. This compressive stress may be as high as 400,000 psi for certain bolted applications.

For dynamic applications, it is necessary to consider the tensile stresses at the points marked S2 and S3. The stresses at these points depend on the ratio of diameters () and the spring characteristic (C) as well as the deflection (f). This stress should not exceed 200,000 psi at .75h deflection. 

Table 1 Intermediate Point Values
Intermediate Point Values
click to enlarge
Table 2 Constant M, C1 and C2
Constant M, C1 and C2
click to enlarge

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  • Home
  • Spring Selection
    • Precision Belleville Springs >
      • .236 to .394
      • .472 to .492
      • .551 to .591
      • .630 to .709
      • .787 to .886
      • .906 to .984
      • 1.100
      • 1.240 to 1.340
      • 1.400 to 1.770
      • 1.970
      • 2.200 to 2.360
      • 2.480 to 2.800
      • 3.150 to 3.540
      • 3.940 to 4.410
      • 4.920
      • 5.510 to 7.090
      • 7.870
      • 8.860 to 9.840
    • AI Springs >
      • AI .187 to .950
      • AI 1.000 to 1.750
      • AI 2.000 to 2.500
    • SP Belleville Springs >
      • SP .197 to .945
      • SP 1.142 to 3.031
    • CONTACT Disc Springs >
      • CONTACT Narrow
      • CONTACT Regular
      • CONTACT Wide
    • K Disc Springs >
      • Metric for K
      • Inch for K
    • FL Disc Springs >
      • Metric for FL
      • Inch for FL
  • Special Springs
  • Spring Design
    • Tolerances >
      • for Thickness
      • Overall Height
      • Hardness Range
      • OD + ID Guide Clearance
      • OD + ID Tolerance
      • Load Tolerance
    • Load Calculations >
      • Nomenclature
      • Load in Lbs
      • True Radius Factor
      • Corner Radius Factor
      • True Cone Height Factor
      • Flattening at Edge Factor
      • Precise Load Computing
    • About >
      • Contact Us
      • News Releases >
        • Fan Disc Second Patent
        • JPL Selects Fan Disc
        • Fan Disc Wins Patent
    • Load and Stress Calculations
    • Dynamic Loading
    • Materials Properties
    • Tightening Torque Values
    • Typical Disc Spring Apps
  • Site Map