Quote:
Originally Posted by jaros44sr
Thanks for the advice, but if I could see how one is made I could reverse engineer for strength
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It's laser cut from most likely 1018 steel and the "hoops" bent up.
The problem with this design is that in a seat belt application all the force will be put right on the bent part of the hoops which looks to have a material thickness of around (1/8") X 1/4", and also, that area is further weakened due to work hardening when it was bent.
Tensile strength of 1018 steel is around 60000 PSI, so each one of those bent corners has a tensile strength of 1875 LBS.
If two of those corner fail, so will the seat belt. A car accident could generate 50G, so your 200LB body could weigh over 10000 LBS.
I could go on, but I'm sure you can see where I'm going with this.
Don't use these for seat belts unless you have a death wish.