Pulling hooks apart for a school project

Discussion in 'Fishing Chit Chat' started by InDeepShip, Oct 29, 2018.

  1. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    I'm going to have to do a final project for one of the material science classes and I was thinking about looking at the material that hooks are made out of. I'm planning on getting a bunch of big supercows sized hooks and pulling on them till they break. Ill then go in and look at the metallurgy of the hook and examine its grains. If you guys have any recommendations for hooks you would like for me to try or want to send me some hooks that you guys would like to see what the max breaking strength is ill be sure to send you the data and the info from the reports and whatnot.
     
  2. RideHPD

    RideHPD Enthusiastic Idiot Rookie

    Location:
    Del Mar/Marina Del Rey, CA
    Name:
    Eric Marin
    Boat:
    10' Model T
    • Messages:
      (1,174)
    • Likes Received:
      (849)
    How were you planning on fixturing them in the load frame?
     
  3. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    I was planning on milling out some bar stock to fit each hook and then having the eyes attached with either a pin or by cable. Most likely the pin method because of less %error in elongation due to stretching
     
    backfisher likes this.
  4. RideHPD

    RideHPD Enthusiastic Idiot Rookie

    Location:
    Del Mar/Marina Del Rey, CA
    Name:
    Eric Marin
    Boat:
    10' Model T
    • Messages:
      (1,174)
    • Likes Received:
      (849)
    Cable still might produce a better result, the hook eye ID is small enough that a pin support may flex appreciably under loads great enough to actually break a hook. The SS hooks will likely bend out before they can break, carbon steel bait hooks designed to rust out will likely undergo brittle fracture. Better have good enclosed shields in case your fixturing doesn't hold the hook elements after failure. I'd probably start with some smaller hooks first and work up for safety reasons.

    If this is a mechanics of materials class then you might consider applying the load to the hook point vs the bend to simulate the point getting stuck in jawbone. That's a real scenario and it changes the mode of failure from predominately tension to predominately flexure. Likely to still see hooks bend instead of break, so you wouldn't get a fracture surface to analyze, but it would be cool for a project.
     
    Cubeye and CartridgeCalls like this.
  5. stephen campbell

    stephen campbell aka "Soup"

    Location:
    oro valley az
    Name:
    Stephen Campbell
    Boat:
    S/V Bluechablis Valiant 40
    • Messages:
      (287)
    • Likes Received:
      (446)
    If Ya go that far I have some 10/0 Norway produced 7691 Mustads to compare with the current Mustad oriental produced hooks. Since they are considered by many the mainstay of tuna fishing any method of test would be of interest. Post or PM me where to send
     
  6. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    thanks for the info the cable route will be a lot easier because I won't need to Mill something out.
    I was planning on doing the bend because that's where it will sit. Also, there is Saftey glass around the testing Machine
     
    Last edited: Oct 30, 2018
  7. RideHPD

    RideHPD Enthusiastic Idiot Rookie

    Location:
    Del Mar/Marina Del Rey, CA
    Name:
    Eric Marin
    Boat:
    10' Model T
    • Messages:
      (1,174)
    • Likes Received:
      (849)
    Yea fixing the point would be a pain in the ass, if even possible. I'd try tying some braid or something around the hook bend to whatever it's interfacing to to ensure it doesn't become ballistic after fracture. Never hurts to be more safe. I know there have been plenty of times I broke something in an Instron that I thought couldn't possibly shift where I was proven wrong.
     
  8. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    Yea we have some dents in the wall of the lab from the same thing. I was going to attach some braid with ducktape or just take off the point of the hook because sharp hook + High Velocity never really go together. Do you think 80lb braid would be enough or should I step up to like 130lb or something?
     
  9. RideHPD

    RideHPD Enthusiastic Idiot Rookie

    Location:
    Del Mar/Marina Del Rey, CA
    Name:
    Eric Marin
    Boat:
    10' Model T
    • Messages:
      (1,174)
    • Likes Received:
      (849)
    80 should be fine as long it's not carrying the primary load. Cable around the bend and then 80 lashed around the two should keep it together.
     
  10. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    Yea that's my plan. I was going to have it slack until the facture.
     
  11. RideHPD

    RideHPD Enthusiastic Idiot Rookie

    Location:
    Del Mar/Marina Del Rey, CA
    Name:
    Eric Marin
    Boat:
    10' Model T
    • Messages:
      (1,174)
    • Likes Received:
      (849)
    Sounds good, looking forward to seeing the results.
     
  12. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    Results should be up before the end of December if not earlier.
     
  13. stephen campbell

    stephen campbell aka "Soup"

    Location:
    oro valley az
    Name:
    Stephen Campbell
    Boat:
    S/V Bluechablis Valiant 40
    • Messages:
      (287)
    • Likes Received:
      (446)
    hook testing..JPG

    Since you travel in this circle you may have seen this work.
     
  14. InDeepShip

    InDeepShip Ah ship

    Location:
    Ventura/Vallejo
    Name:
    Adam
    Boat:
    In my Dream's
    • Messages:
      (663)
    • Likes Received:
      (280)
    Started some of the testing today. The hook I'm using is the VMC 8705 13/0 it looks like a killer yummy hook
    It straightened out at about 500lb but didn't shatter
     

Share This Page