MIE442 PS 6 solns 2015 - MACHINEDESIGN An...

Info icon This preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
MACHINE DESIGN - An Integrated Approach PROBLEM 6.19 6-19-1 Statement lleterminc the sizc of the clevis pin shown in Figu"e P6-E needed to withsttnd an epplied repcatcd fonceof 0 to 13{XXX) lb for infinite life. Also determinc the rcquired outside radius of the clevls end to not feil in cfthcr tcarrut or bcarlng if the clevis flenges art each 2.5 in thiclc Use a sefety factor of 3. Assume .Sr, = 140 kgi for the pin and .9u, = 80 ksi for the clevis. kip:= to3.lb| Unite: Given: frsi:= 103-psi Minimum force Prnir:= Q.lbf Maximum force P4or:= l30.Hp Flangethickness t := 2.5.in Factor of safety against fatigue failure Ny:= 3 Material strengtlr Pin Sutp;= l4}ftsi Clevis 56r:= $}.ftsi Assumptions: The partsare machined. Use 90% reliability and room temperature' Solufon: See Figure Gl9 and Mathcad file P0619. l. Calculate the altematingand mean componsnts of the forces on the clevis and link. Pmax- Pmin Ps:= D.- Im.- Strpss in Pin 2. The pin is in double shear and there is no stress-conceirtration. The alternating and meanloadsat one section on the pin are lPa ra= i.T . ^prn The cross-section area ofthe pin is The alternating and meanshear stresses and von Mises stresses are 2 Pmat! P-in 2 Pa= 65kip Pm = 65 kiP t6(d1 := 2-Apin{d) d*(4:= r15."*(a lPn t^ = Z'T t nptn ) Apil,4:= Y (l) (2) (3) (4) Pm 3. 4. cfd.:=h dldS:=,'F'""@l Pin Strenglh 5. Calculate the unmodified endurance limit. S'"0:= 0.5-56O S'"p= Tokti 6. Calculate the endurance limit modification factorr for a nonrotating rormd pin rr.b,xlll+,4. S\Qgt, Load c6a,-$ > 0'+ (ib"S" [email protected]? 6 size Acs(d),[email protected] *n.^Wr* Cri"/.$:= O.me'[ i1-o'0" P 0619.mcd n-l I 4 W4^^,
Image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
MACHINE DESIGN - An Integrated Approach Surface A:= 2.70 Tonperature Reliability Csurf 1= "rcmp.- Crefiab:= 0.897 7. Calculate the modified enduranc€ limit. b:= -0.265 (machined) csurf = o'729 (R:eOw FIGURE 6-19 &19-2 ^(Y)' I Se+ -- 3L ot{' F:l Tearout lenglh (6) Nf= Sep(O'sutp dfidySu1o+ dn(O.Seld) Clevis Tearout (Sec Figure Gl9) 10. Let the outside radius of the clevis be R. Then the teamut area is I l. The altematingand mean shear sEesses and von Mises Srp{rl) := C toat C su"($.
Image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern