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Recent content by jack20

  1. jack20

    Steel Vs Titanium Fasteners - Preload / Clamping Force

    Thank you for your answers, I understand this and it matches my pre load calculations. I am trying to demonstrate why a steel fastener rotates under load and an identical fastener made from titanium at the same torque doesn't. I would be very grateful to hear your theories. The friction...
  2. jack20

    Steel Vs Titanium Fasteners - Preload / Clamping Force

    Hi, I am trying to determine the difference between a steel and titanium fastener of the same diameter and length when torque tightening to a standard value. Obviously the steel fastener is stiffer than the titanium and I believe this means the titanium fastener is likely to have a higher...
  3. jack20

    Calculating Fastener Torque

    The calculation MintJulep explains seems very sensible, I would like to simply bound the possibilities to calculate the maximum and minimum twist possible in degrees, can somebody help to explain how? I have purchased a Roark's stress and strain book but exactly what I should be doing isn't...
  4. jack20

    Calculating Fastener Torque

    Hi, thank you all for the information above. I will explain some more about the reason for this question. The fasteners in question hold a large heavy plate onto the side of a digger arm (farm equipment) if an Allen key has not been used to react the fastener while torquing then after a couple...
  5. jack20

    Calculating Fastener Torque

    Hi, I would like to calculate how much a bolt with a long grip length might twist during torque tightening of the nut to a specific torque value. The hole needs to be interference and it is important that I consider differences between reacting the head of the fastener with a spanner and only...

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