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    Belleville Stresses

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    seamesb
    This document provides information about the geometry, material properties, and fatigue life testing results of a Belleville spring. It includes dimensions such as outer diameter, inner diameter, thickness, and dish height. Stress-deflection curves from fatigue tests at various load levels are presented, along with controlling stress points and estimated fatigue life in number of cycles based on spring material and stress range.

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    Attribution Non-Commercial (BY-NC)
    Download as XLS, PDF, TXT or read online from Scribd

    Belleville Stresses

    Uploaded by

    seamesb
    52 views1 page
    This document provides information about the geometry, material properties, and fatigue life testing results of a Belleville spring. It includes dimensions such as outer diameter, inner diameter, thickness, and dish height. Stress-deflection curves from fatigue tests at various load levels are presented, along with controlling stress points and estimated fatigue life in number of cycles based on spring material and stress range.

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    This document provides information about the geometry, material properties, and fatigue life testing results of a Belleville spring. It includes dimensions such as outer diameter, inner diameter, thickness, and dish height. Stress-deflection curves from fatigue tests at various load levels are presented, along with controlling stress points and estimated fatigue life in number of cycles based on spring material and stress range.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
    52 views1 page

    Belleville Stresses

    Uploaded by

    seamesb
    This document provides information about the geometry, material properties, and fatigue life testing results of a Belleville spring. It includes dimensions such as outer diameter, inner diameter, thickness, and dish height. Stress-deflection curves from fatigue tests at various load levels are presented, along with controlling stress points and estimated fatigue life in number of cycles based on spring material and stress range.

    Copyright:

    Attribution Non-Commercial (BY-NC)
    Download as XLS, PDF, TXT or read online from Scribd
    Download as xls, pdf, or txt
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    Belleville Spring Fatigue Life

    OD (De) 4.92 in E 30,000,000 psi


    ID (Di) 2.01 in Poisson's Ratio (mu) 0.3
    Disc Thickness (t) 0.1575 in Factor [4E/(1-mu^2)] 131,868,132 psi
    Dish Height (h0) 0.1772 in
    Total Free Height(L0) 0.3347 in K1 0.756
    Dia Ratio (Delta) 2.45 K2 1.317
    Height / thick 1.1 K3 1.544
    Thickness Group Group 2 Multiplying Stack
    Factor
    Deflection (s) Load sigma 0 sigma I sigma II sigma III sigma IV Deflection Load
    % in lbs psi psi psi psi psi 9 7
    25% 0.0443 2,282 (47,994) (142,782) 12,458 67,525 4,103 0.399 15,977
    50% 0.0886 3,677 (95,988) (266,947) 43,535 124,817 (2,026) 0.797 25,740
    75% 0.1329 4,480 (143,982) (372,494) 93,229 171,876 (18,388) 1.196 31,360
    100% 0.1772 4,987 (191,976) (459,423) 161,540 208,704 (44,983) 1.595 34,909
    Usually Neg (Compressive) Usually Positive (Tensile)

    19% 0.0342 1,853 (37,097) (111,999) 7,996 53,092 4,069 0.308 12,969 With Wear
    43% 0.0759 3,351 (82,238) (233,279) 32,729 109,450 776 0.683 23,457 Open
    Differences: 0.0417 1498 24,733 56,358 0.37

    35% 0.0620 2,930 (67,191) (194,682) 22,655 91,669 2,879 0.558 20,512 No Wear
    0.250

    Controlling Stress Point for Fatigue Analysis (II or III)


    6,000 250,000

    1.4
    Force (lbs)

    Point III 5,000


    200,000

    Stress (psi)
    Point II or Point III 4,000
    150,000
    1.0
    3,000

    100,000
    h0/t

    2,000

    0.6 50,000
    1,000
    Point II

    - -
    0.0000 0.0500 0.1000 0.1500 0.2000
    0.2
    1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 Deflection (in)
    Force Stress II Stress III
    Delta

    Group 2 Fatigue Life

    175,000
    N=100,000 Cycles

    150,000
    N=500,000 Cycles

    125,000
    Maximum Stress (psi)

    N>=2,000,000
    100,000 Cycles

    75,000

    50,000

    25,000

    -
    - 25,000 50,000 75,000 100,000 125,000 150,000 175,000
    Minimum Stress (psi)

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