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  1. ThereAre4Lights

    strain-life method fatigue properties for A286 fasteners

    Thanks everyone! I'll keep digging!
  2. ThereAre4Lights

    strain-life method fatigue properties for A286 fasteners

    Thanks for the information Wil. Focusing on tension at the moment but I suppose combined tension-shear is where I'm heading towards for some locations. I am interested in finding theoretical methods for estimation of life,not necessarily actual testing methods since I'm working on something new...
  3. ThereAre4Lights

    strain-life method fatigue properties for A286 fasteners

    Hello, I have been looking into the fatigue life and strength of bolts and have come across NAS6704, who's spec states that it is made of A286 UNS 66286 material. I've looked into finding cycles to failures using a developed S-N curve and also looked into the strain-life approach per guidance...
  4. ThereAre4Lights

    MS24677/NAS1352 Properties?

    Thanks all, I'll be looking at the resources posted.
  5. ThereAre4Lights

    MS24677/NAS1352 Properties?

    I am looking for Young's Modulus and coefficient of thermal expansion data for a number of fasteners, for example, MS24677/NAS1352. The spec sheets for these specify minimum tensile strength (psi) and also the specific strength of each bolt per size (lbs). However, under material it simply...
  6. ThereAre4Lights

    Torque/Preload Calculation for tension vs shear joint Questions

    Thanks rb1957, SparWeb--> reading more into this and definitely combing through Mil-Hdbk-60 now. I was wondering if there was a rule of thumb for pre-load as a % of yield for a tension joint vs a shear joint but that doesn't seem to exist. General guidelines suggest a set pre-load independent of...
  7. ThereAre4Lights

    Torque/Preload Calculation for tension vs shear joint Questions

    I am calculating the required installation torque/pre-load for a series of fasteners. I am using the basic formula of: T=KFd where K is the nut factor, F is the bolt preload, and d is the bolt nominal diameter. Using the Machinery's Handbook 30th edition as a reference I calculate the preload...
  8. ThereAre4Lights

    Purpose of Petrolatum compound in Cleaning Procedure?

    Hello Will, I am working toward USA requirements but the CASA reqs provided additional detailed information - I figured I'd gather the AC 43.13-1B, SAE ARP1870A, and the CASA documents to make sure I covered my basis and didn't miss anything. The SAE document also specifies a wire-brush for...
  9. ThereAre4Lights

    Purpose of Petrolatum compound in Cleaning Procedure?

    Thank you John, I'll read more on that. Wil, yes that is correct, my mistake.
  10. ThereAre4Lights

    Purpose of Petrolatum compound in Cleaning Procedure?

    I looking at bonding and grounding of aircraft components. This process includes surface cleaning to ensure good conductivity between contacting parts. My main sources are AC 21-99 and SAE ARP1870A. The two have directions on cleaning of aluminum surfaces and I am trying to reconcile them and...
  11. ThereAre4Lights

    NAS1351 Minimum Strength Note Question

    Thank you again! Great info.
  12. ThereAre4Lights

    NAS1351 Minimum Strength Note Question

    Thank you Wil! This makes sense. It didn't occur to me that 'lined through' referred to the crossed out data. Your insight is much appreciated!
  13. ThereAre4Lights

    NAS1351 Minimum Strength Note Question

    Hello, the spec for this fastener lists "Minimum Breaking Strength" in pounds and has a note saying: "MINIMUM BREAKING STRENGTH VALUES ARE BASED ON 180 KSI HEAT TREATMENT. LINED THROUGH STRENGTH VALUES WERE BASED ON 170 KSI" Perhaps I am not familiar with the term, but what does 'lined through...

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