A tube is hollow, solid rod is not hollow.
You just lost me with the solid pipe. I guess it was the whole being a pipe thing.Bike4life, which is stronger? A solid 8" pipe weighing 1lb or an 8" tube weighing 1lb both made of steel?
Ok sorry didn’t reply soon as stupid hotel gave me food poisoning. Ok I think u mean a 8” solid round stock of 1lb and a 8” hollow round stock of like 1/3lb. In this case if they were columns or beams, the solid would be stronger but not by much, they would be very close. The reason is that the OD is where the most force is and as u approach the center, the force becomes 0. Take a piece of foam with nails on the top and bottom. When bent, the nails bend inward (compression) on the top and the bottom the nails bend outward (tension). But at the very center longitudinallyBike4life, which is stronger? A solid 8" pipe weighing 1lb or an 8" tube weighing 1lb both made of steel?
Yeah I know that with the distance. No duh Sherlock but I didn’t include it as it’s a constant. Like when building a table or a bridge it’s a set distance u can’t exactly make it shorter unless u use columns, which are sometimes impractical and ugly.You say the bending strength of a solid shape and give it a formula. A 2x6 is not 6"tall nor is it 2" wide. 5.5^3x1.5=249 and none of this works because not all "solid shape" materials share the same structural values. What works for wood won't work for steel, and the bending point (deflection) will change depending on the camber, and the distance spanned. If you place 249 lbs on a 2x6 spanning 2' it won't budge. Span it 20' and you might find a moment. If your giving out life hacks, please include all the facts.
At least your thinking though. When I was your age all I was thinking about was how I was gonna be able to have enough money for a bag of weed, gas for my car, and a good plan to get into my girls pants over the weekend.
Whatt... yeah there is more like tpi, and other stuff but that’s noise. For our purposes the minor diameter is what matters most. The other stuff has little affect and would be more complex mathNobody is going 1/2 the speed of light. You will have issues with measuring it due to the time difference.
There is a lot more to a bolt than the minor diameter of its thread. Go back to school kid.
Yeah before when u said 8” it was confusing as a solid tube of 8” is stronger than a hollow tube of 8”, as therefore the solid would weigh more, so how could they both be 1lb. Good u rephrased it. Drilling out the center of a solid will make it weaker, this is intuitive. As u could crush it easy by stepping on it or bending it.Most people w/o thinking about it will say a solid rod weighing 1lb is stronger than a tube weighing 1lb, both steel. Actually the tube is stronger. Remember both have the same amount of steel in them by weight.
At least your thinking though. When I was your age all I was thinking about was how I was gonna be able to have enough money for a bag of weed, gas for my car, and a good plan to get into my girls pants over the weekend.
Whatt... yeah there is more like tpi, and other stuff but that’s noise. For our purposes the minor diameter is what matters most. The other stuff has little affect and would be more complex math