Contact phenomena. I: stresses, deflections and contact by Engineering Sciences Data Unit

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Additional resources for Contact phenomena. I: stresses, deflections and contact dimensions for normally-loaded unlubricated elastic components

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29) When the contact is circular, the non-dimensionalised direct stresses are given by ESDU Copyright material. For current status contact ESDU. 0 = sin γ . 33) 1 - . 46). 45) are based on work from Derivation A3. 36) ( fz )p = 0 . 39) p = ( q yz ) = 0 . 2 Stresses at ends of contact ellipse ESDU Copyright material. For current status contact ESDU. At the ends of the major semi-axis, where x = ± a and y = 0 , the principal stresses are obtainable from  1 – 2σ a +Λ ( fx )a = β  ----------------- 1 – ------- log e a-------------2 Λ 2 a–Λ 1 – β  and , ( fy ) = – ( fx ) a a ( f z ) = ( q xy ) = ( q yz ) = ( q zx ) = 0 .

J. Clifton – Executive Engineer, Head of Mechanisms.

For current status contact ESDU.  1011 5+1010 10−3 2+1010 This graph gives data for steel-on-steel contacts. To obtain stresses for other materials, multiply by ksteel 1/2 value of fz 1010 max 5+109 kother Data are valid for alike materials only. 10−2  2+109 109 Radius, R21 (m) 5+108 10−1 45 2+108 Non-conforming contacts ! 1 −2 −10 max 108 5+107 ! −1 −1 −10 10 ! Maximum compressive (N/m2) stress, fz Conforming contacts 2+107 107 2 10 5+10 6 2+106 −102 −10 106 -3 10−3 -2 10−2 -1 10−1 10 10 Radius, R11 (m) 101 2 3 2 10 1010 104 105 106 107 Load per unit length, P/L (N/m) FIGURE 8 LONG RECTANGULAR CONTACTS (CYLINDER AND EITHER CYLINDER, OR PLATE, OR GROOVE) 108 78035   78035 APPENDIX A EQUATIONS FOR CONTACT GEOMETRY AND STRESSES A1.

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